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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2019	Apr. 30, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	THRM
Entity Registrant Name	GENTHERM INC
Entity Central Index Key	0000903129
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		33,675,021

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 38,769	$ 39,620
Restricted cash	2,500
Accounts receivable, less allowance of $1,068 and $851, respectively	175,044	166,858
Inventory:
Raw materials	66,316	61,679
Work in process	4,830	5,939
Finished goods	40,979	44,917
Inventory, net	112,125	112,535
Derivative financial instruments	857	92
Prepaid expenses and other assets	55,577	54,271
Assets held for sale	17,009	69,699
Total current assets	401,881	443,075
Property and equipment, net	168,371	171,380
Goodwill	54,721	55,311
Other intangible assets, net	53,188	56,385
Operating lease right-of-use assets	14,058
Deferred financing costs	575	647
Deferred income tax assets	61,032	64,024
Other non-current assets	9,220	12,225
Total assets	763,046	803,047
Current Liabilities:
Accounts payable	91,286	93,113
Accrued liabilities	60,907	65,808
Current lease liabilities	4,203
Current maturities of long-term debt	2,949	3,413
Liabilities held for sale	7,009	13,062
Total current liabilities	166,354	175,396
Pension benefit obligation	6,755	7,211
Non-current lease liabilities	9,307
Long-term debt, less current maturities	97,604	136,477
Deferred income tax liabilities	1,649	1,177
Other non-current liabilities	2,890	3,087
Total liabilities	284,559	323,348
Common Stock:
No par value; 55,000,000 shares authorized, 33,653,179 and 33,856,629 issued and outstanding at March 31, 2019 and December 31, 2018, respectively	134,486	140,300
Paid-in capital	14,513	14,934
Accumulated other comprehensive loss	(43,152)	(39,500)
Accumulated earnings	372,640	363,965
Total shareholders’ equity	478,487	479,699
Total liabilities and shareholders’ equity	$ 763,046	$ 803,047

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,068	$ 851
Common Stock, par value
Common Stock, shares authorized	55,000,000	55,000,000
Common Stock, shares issued	33,653,179	33,856,629
Common Stock, shares outstanding	33,653,179	33,856,629

Consolidated Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Product revenues	$ 257,921	$ 264,586
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Cost of sales	$ 182,614	$ 183,344
Gross margin	75,307	81,242
Operating expenses:
Net research and development expenses	18,897	23,304
Selling, general and administrative expenses	32,613	36,424
Acquisition transaction expenses	38
Restructuring expenses	1,914	865
Total operating expenses	53,462	60,593
Operating income	21,845	20,649
Interest expense	(1,368)	(1,180)
Foreign currency gain (loss)	203	(4,578)
Gain on sale of business	4,970
Impairment loss	(10,484)
Other income	143	1,111
Earnings before income tax	15,309	16,002
Income tax expense	6,895	3,036
Net income	$ 8,414	$ 12,966
Basic earnings per share	$ 0.25	$ 0.35
Diluted earnings per share	$ 0.25	$ 0.35
Weighted average number of shares – basic	33,573,411	36,766,411
Weighted average number of shares – diluted	33,733,335	36,873,407

Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 8,414	$ 12,966
Other comprehensive (loss) income, gross of tax:
Foreign currency translation adjustments (loss) gain	(4,074)	11,741
Unrealized gain on foreign currency derivative securities	766	2,112
Unrealized loss on commodity derivative securities		(218)
Other comprehensive (loss) income, gross of tax	(3,308)	13,635
Other comprehensive (loss) income, related tax effect:
Cumulative effect of accounting change due to ASU 2018-02		(40)
Foreign currency translation adjustments (loss) gain	(177)	(76)
Unrealized gain on foreign currency derivative securities	(167)	(567)
Unrealized loss on commodity derivative securities		(59)
Other comprehensive (loss) income, related tax effect	(344)	(742)
Other comprehensive (loss) income, net of tax	(3,652)	12,893
Comprehensive income	$ 4,762	$ 25,859

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Activities:
Net income	$ 8,414	$ 12,966
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,052	12,892
Deferred income taxes	1,749	(707)
Stock compensation	1,968	2,202
Defined benefit plan (income) expense	(617)	298
Provision of doubtful accounts	229	41
Loss on sale of property and equipment	178	85
Operating lease expense	1,333
Impairment loss	10,484
Gain on sale of business	(4,970)
Changes in assets and liabilities:
Accounts receivable	(8,293)	(9,691)
Inventory	(229)	1,903
Prepaid expenses and other assets	(5,553)	(4,881)
Accounts payable	(2,079)	1,290
Accrued liabilities	(6,785)	(10,808)
Net cash provided by operating activities	6,881	5,590
Investing Activities:
Proceeds from the sale of property and equipment	28
Proceeds from sale of a business	47,500
Final payment for acquisition of subsidiary, net of cash acquired		(15)
Purchases of property and equipment	(5,150)	(8,378)
Net cash provided by (used in) investing activities	42,378	(8,393)
Financing Activities:
Borrowing of debt	10,428
Repayments of debt	(49,627)	(35,492)
Cash paid for the cancellation of restricted stock	(376)	(659)
Proceeds from the exercise of Common Stock options	214	751
Repurchase of Common Stock	(8,040)
Net cash used in financing activities	(47,401)	(35,400)
Foreign currency effect	(209)	5,513
Net increase (decrease) in cash, cash equivalents and restricted cash	1,649	(32,690)
Cash, cash equivalents and restricted cash at beginning of period	39,620	103,172
Cash, cash equivalents and restricted cash at end of period	41,269	70,482
Supplemental disclosure of cash flow information:
Cash paid for taxes	3,466	6,870
Cash paid for interest	1,252	981
Supplemental disclosure of non-cash transactions:
Common Stock issued to Board of Directors and employees	$ 1,581	$ 1,362

Consolidated Condensed Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Earnings
Beginning Balance at Dec. 31, 2017	$ 553,874	$ 265,048	$ 15,625	$ (20,444)	$ 293,645
Beginning Balance (in shares) at Dec. 31, 2017		36,761,000
Cumulative effect of accounting change due to adoption of ASU \| ASU 2014-09	(3,264)				(3,264)
Cumulative effect of accounting change due to adoption of ASU \| ASU 2016-16	31,645				31,645
Cumulative effect of accounting change due to adoption of ASU \| ASU 2018-02				(40)	40
Exercise of Common Stock options for cash	751	$ 1,061	(310)
Exercise of Common Stock options for cash (in shares)		57,000
Cancellation of restricted stock	(659)	$ (659)
Cancelation of restricted stock (in shares)		(24,000)
Restricted stock and stock option compensation	2,202	$ 1,362	840
Currency translation, net	11,665			11,665
Foreign currency hedge, net	1,545			1,545
Commodity hedge, net	(277)			(277)
Net income	12,966				12,966
Ending Balance at Mar. 31, 2018	610,448	$ 266,812	16,155	(7,551)	335,032
Ending Balance (in shares) at Mar. 31, 2018		36,794,000
Beginning Balance at Dec. 31, 2018	$ 479,699	$ 140,300	14,934	(39,500)	363,965
Beginning Balance (in shares) at Dec. 31, 2018	33,856,629	33,857,000
Cumulative effect of accounting change due to adoption of ASU \| ASU 2016-02	$ 261				261
Stock repurchase	(8,040)	$ (8,040)
Stock repurchase (in shares)		(200,000)
Exercise of Common Stock options for cash	214	$ 1,021	(807)
Exercise of Common Stock options for cash (in shares)		13,000
Cancellation of restricted stock	(376)	$ (376)
Cancelation of restricted stock (in shares)		(17,000)
Stock option compensation	386		386
Common Stock issued to Board of Directors and employees	1,581	$ 1,581
Currency translation, net	(4,251)			(4,251)
Foreign currency hedge, net	599			599
Net income	8,414				8,414
Ending Balance at Mar. 31, 2019	$ 478,487	$ 134,486	$ 14,513	$ (43,152)	$ 372,640
Ending Balance (in shares) at Mar. 31, 2019	33,653,179	33,653,000

The Company and Subsequent Events

3 Months Ended

Mar. 31, 2019

Company And Subsequent Events [Abstract]

The Company and Subsequent Events

Note 1 – The Company and Subsequent Events

Gentherm Incorporated is a global technology and industry leader in the design, development, and manufacturing of innovative thermal management technologies. Unless the context otherwise requires, the terms “Gentherm”, “Company”, “we”, “us” and “our” used herein refer to Gentherm Incorporated and its consolidated subsidiaries. Our products provide solutions for automotive passenger climate comfort and convenience, battery thermal management and cell connecting systems, as well as patient temperature management within the health care industry. Our automotive products can be found on the vehicles of nearly all major automotive manufacturers operating in North America, Europe and Asia. We operate in locations aligned with our major customers’ product strategies to provide locally enhanced design, integration and production capabilities and to identify future thermal technology product opportunities in both automotive and other markets. We concentrate our research on the development of new technologies and new applications from existing technologies to create product and market opportunities for a wide array of thermal management solutions.

Sale of Cincinnati Sub-Zero Industrial Chamber Business (CSZ-IC)

On February 1, 2019, as part of the Company’s Fit-for-Growth initiative to eliminate investments in non-core businesses, we completed the sale of the Cincinnati Sub-Zero industrial chamber business (“CSZ-IC”) and former Cincinnati Sub-Zero headquarters facility to Weiss Technik North America, Inc. for total cash proceeds of $47,500, including $2,500 of the cash proceeds were placed into an escrow account for a period of up to one year as partial security for the Company’s obligations under the sale agreement. In connection with the sale, Gentherm entered into an operating lease agreement for a portion of the office and manufacturing building space purchased by Weiss Technik North America, Inc. The Company recognized a $4,970 pre-tax gain on the sale of CSZ-IC during the three-month period ended March 31, 2019.

Fit-for-Growth

Gentherm recognized $395 and $0 of one-time employee termination costs in restructuring expenses pertaining to Fit-for-Growth during the three-month periods ended March 31, 2019 and 2018, respectively. Gentherm recognized $4 and $0 of contract termination costs in restructuring expenses pertaining to Fit-for-Growth during the respective three-month periods ended March 31, 2019 and 2018, respectively.

GPT and CSZ-IC

During 2018, Gentherm launched a program to actively market GPT and CSZ-IC and initiated all other actions required to complete the divestiture plan. Gentherm incurred $839 of consultant costs in restructuring expenses to execute the plan. Lastly, Gentherm recognized $251 of one-time employee termination costs in restructuring expenses related to the divestiture process during the three-month period ended March 31, 2019. See Note 12 to our consolidated condensed financial statements for additional information regarding the assets and liabilities classified as held for sale.

Restructuring Liability

Restructuring liabilities totaling $1,358 and $2,547 as of March 31, 2019 and December 31, 2018, respectively, are classified as accrued liabilities on the consolidated condensed balance sheets. A reconciliation of the beginning and ending restructuring liability is as follows:

	One-Time Employee Termination Benefit Costs			Contract Termination Costs			Consulting Costs			Asset Disposal Costs			Total
Three Months Ended March 31, 2019
Balance, beginning of period	$	2,079		$	389		$	79		$	—		$	2,547
Additions, charged to restructuring expenses		646			4			839			425			1,914
Payments		(1,675	)		(88	)		(915	)		(425	)		(3,103	)
Balance, end of period	$	1,050		$	305		$	3		$	—		$	1,358

Note 1 – The Company and Subsequent Events – Continued

The cumulative amount of restructuring expenses incurred and recognized in the automotive and industrial reporting segments during the three-month period ended March 31, 2019 was $368 and $1,546, respectively.

Subsequent Events

On April 1, 2019, we acquired all of the equity interests of Stihler Electronic GmbH (“Stihler”) in an all-cash transaction for approximately $15,000, net of cash acquired, and an additional cash payment of up to $1,700 contingent upon achievement of future milestones. Based in Stuttgart, Germany, Stihler manufactures high quality patient and blood temperature systems and other medical equipment for the health care industry.

Summary of Significant Accounting Policies and Basis of Presentation

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies and Basis of Presentation

Note 2 – Summary of Significant Accounting Policies and Basis of Presentation

Accounting Principles

Our unaudited consolidated condensed financial statements and accompanying notes have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and note disclosures normally included in the audited annual consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States of America have been condensed or omitted pursuant to those rules and regulations. In the opinion of management, all adjustments, consisting of normal recurring items, considered necessary for a fair presentation of our results of operations, financial position and cash flows have been included. The balance sheet as of December 31, 2018 was derived from audited annual consolidated financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America. Certain reclassifications of prior year’s amounts have been made to conform with the current year’s presentation. Notably, for the three-month period ended March 31, 2018, $2,697 in customer relationship amortization was reclassified from product revenues to selling, general and administrative expenses. Operating results for the three-month period ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019. These consolidated condensed financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2018.

Consolidation

The consolidated condensed financial statements at March 31, 2019 and December 31, 2018 and for the three-month periods ended March 31, 2019 and 2018, reflect the consolidated financial position, the consolidated operating results and the consolidated cash flows of the Company. Investments in affiliates in which Gentherm would not have control, but would have the ability to exercise significant influence over operating and financial policies, would be accounted for under the equity method. All other equity investments are measured at cost, less impairment, with changes in fair value recognized in net income.

Use of Estimates

The presentation of financial statements in conformity with generally accepted accounting principles in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Actual results could differ from those estimates and assumptions.

Note 2 – Summary of Significant Accounting Policies and Basis of Presentation – Continued

Cash, cash equivalents and restricted cash

The Company has cash that is legally restricted as to use or withdrawal. A reconciliation of cash and cash equivalents on the consolidated condensed balance sheets to cash, cash equivalents and restricted cash presented on the consolidated condensed statements of cash flows is as follows:

Year	March 31, 2019		December 31, 2018		March 31, 2018		December 31, 2017
Cash and cash equivalents presented in the consolidated condensed balance sheets	$	38,769	$	39,620	$	70,482	$	103,172
Restricted cash		2,500		—		—		—
Cash, cash equivalents and restricted cash presented in the consolidated condensed statements of cash flows	$	41,269	$	39,620	$	70,482	$	103,172

Leases

The Company determines whether a contractual arrangement is or contains a lease at inception. Leases that are operating in nature are recognized in operating lease right-of-use assets, accrued liabilities and lease liabilities on our consolidated condensed balance sheet. While Gentherm is not currently party to any leases that qualify as financing leases, right-of-use assets and liabilities recognized from financing leases would be presented separately from the right-of-use assets and liabilities recognized from operating leases on our consolidated condensed balance sheet.

Lease liabilities are measured initially at the present value of the sum of the future minimum rental payments at the commencement date of the lease. Lease payments that will vary in the future due changes in facts and circumstances are excluded from the calculation of rental payments, unless those variable payments are based on an index or rate. Rental payments are discounted using an incremental borrowing rate based on the Company’s credit rating, determined on a fully collateralized loan basis from information available at commencement date, and the duration of the lease term (the “reference rate”). Judgement is used to assess the importance of risk factor inputs during the computation of the Company’s credit rating. For significant leases at foreign subsidiaries denominated in U.S. Dollars, a risk premium associated with the borrower subsidiary’s country is added to the reference rate. For significant leases at foreign subsidiaries denominated in a foreign currency, the U.S. Dollar risk free rate with a duration similar to that of the lease term is subtracted from the reference rate and a corresponding foreign currency risk free rate with a duration similar to that of the lease term is added to the reference rate. Judgement is used to determine whether foreign subsidiary leases are significant.

Operating lease right-of-use assets are measured at the amount of the lease liability, adjusted for prepaid or accrued lease payments, lease incentive received, and initial direct costs incurred, as applicable. Periods covered by an option to extend the lease are initially included in the measurement of an operating lease right-of-use asset and lease liability only when it is reasonably certain we will exercise the option. Gentherm’s lease agreements do not contain residual value guarantees or impose restrictions or covenants on the Company.

For all classes of underlying assets, the Company accounts for leases that contain separate lease and nonlease components as containing a single lease component. The Company does not recognize lease right-of-use assets and lease liabilities from leases with an original lease term of 12 months or less and, instead, recognizes rent payments on a straight-line basis over the lease term in the Company’s consolidated condensed statement of income. See Note 10 to our consolidated condensed financial statements for description of the changes made to our accounting policy for leases that resulted from the adoption of a new lease standard.

Impairments of Goodwill and Other Intangible Assets

Whenever events or changes in circumstances indicate that it is more likely than not that a reporting unit’s fair value is less than is carrying amount, the Company then compares the fair value of the reporting unit to the related net book value. If the net book value of a reporting unit exceeds its fair value, an impairment loss is measured and recognized. The fair value of a reporting unit is estimated by analyzing internal inputs (level 3) to calculate forward values and discounting those values to the present value.

Note 2 – Summary of Significant Accounting Policies and Basis of Presentation – Continued

There were no events or changes in circumstances which would indicate goodwill was impaired or potentially impaired during the three-months ended March 31, 2019.

A rolled forward reconciliation of goodwill from December 31, 2018 to March 31, 2019 is as follows:

Three Months Ended March 31, 2019
Balance, beginning of period	$	55,311
Currency impact		(590	)
Balance, end of period	$	54,721

Assets and Liabilities Held for Sale

The Company classifies assets and liabilities (disposal groups) to be sold as held for sale in the period in which all of the following criteria are met: management, having the authority to approve the action, commits to a plan to sell the disposal group; the disposal group is available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such disposal groups; an active program to locate a buyer and other actions required to complete the plan to sell the disposal group have been initiated; the sale of the disposal group is probable, and transfer of the disposal group is expected to qualify as a completed sale within one year, except if events or circumstances beyond the Company’s control extend the period of time required to sell the disposal group beyond one year; the disposal group is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and actions required to complete the plan indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.

The Company initially measures a disposal group that is classified as held for sale at the lower of its carrying value or fair value less any costs to sell. Any loss resulting from this measurement is recognized in the period in which the held for sale criteria are met. Gains are not recognized on the sale of a disposal group until the date of sale. The Company assesses the fair value of a disposal group, less any costs to sell, each reporting period it remains classified as held for sale and reports any subsequent losses as an adjustment to the carrying value of the disposal group.

The Company reports assets and liabilities of the disposal group in the line items assets held for sale and liabilities held for sale in the consolidated condensed balance sheet in the period the disposal group meets the criteria to be classified as held for sale. See Note 12 to our consolidated condensed financial statement for information about the assets and liabilities classified as held for sale.

Earnings Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Earnings per Share

Note 3 – Earnings Per Share

Basic earnings per share are computed by dividing net income by the weighted average number of shares of stock outstanding during the period. The Company’s diluted earnings per share give effect to all potential Common Stock outstanding during a period that do not have an anti-dilutive impact to the calculation. In computing the diluted earnings per share, the treasury stock method is used in determining the number of shares assumed to be issued from the exercise of Common Stock equivalents.

The following summarizes the Common Stock included in the basic and diluted shares, as disclosed on the face of the consolidated condensed statements of income:

	Three Months Ended March 31,
	2019		2018
Weighted average number of shares for calculation of basic EPS		33,573,411		36,766,411
Stock options, restricted stock awards and restricted stock units under equity incentive plans		159,924		106,996
Weighted average number of shares for calculation of diluted EPS		33,733,335		36,873,407

The following table represents Common Stock issuable upon the exercise of certain stock options that have been excluded from the diluted earnings calculation because the effect of their inclusion would be anti-dilutive.

	Three Months Ended March 31,
	2019		2018
Stock options under equity incentive plans		396,500		1,914,150

Segment Reporting

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment Reporting

Note 4 – Segment Reporting

Segment information is used by management for making strategic operating decisions for the Company. Management evaluates the performance of the Company’s segments based primarily on operating income or loss.

The Company’s reportable segments are as follows:

●

Automotive – this segment represents the design, development, manufacturing and sales of automotive climate control seat (CCS) products, seat heaters, steering wheel heaters, automotive cables, battery thermal management (BTM), electronics and other automotive products.

•

Industrial – the combined operating results of GPT, Gentherm Medical and Gentherm’s advanced research and development division. We perform advanced research and development on thermal management systems, including those that utilize new proprietary comfort software algorithms, to enhance the efficiency and functionality of our automotive heating and cooling products. Unlike research and development that relates to a specific product application for a customer, advanced research and development activities affect products and technologies that are not currently generating product revenues. The segment includes government sponsored research projects.

●

Reconciling Items – include corporate selling, general and administrative costs and acquisition transaction costs.

Note 4 – Segment Reporting – Continued

The tables below present segment information about the reported product revenues, depreciation and amortization and operating income (loss) of the Company for three-month period ended March 31, 2019 and 2018. With the exception of goodwill, asset information by segment is not reported since the Company does not manage assets at a segment level. As of March 31, 2019, goodwill assigned to our Automotive and Industrial segments were $36,943 and $17,778, respectively. As of March 31, 2018, goodwill assigned to our Automotive and Industrial segments were $39,666 and $30,773, respectively.

Three Months Ended March 31,	Automotive		Industrial⁽¹⁾			Reconciling Items			Consolidated Total

2019:
Product revenues	$	242,357	$	15,564		$	—		$	257,921
Depreciation and amortization		10,296		290			466			11,052
Operating income (loss)		39,896		(4,514	)		(13,537	)		21,845
2018:
Product revenues⁽¹⁾	$	242,716	$	21,870		$	—		$	264,586
Depreciation and amortization		10,809		1,351			732			12,892
Operating income (loss)		41,282		(6,798	)		(13,835	)		20,649

(1)

Industrial segment includes $3,418 and $10,213 in product revenues, $0 and $625 in depreciation and amortization, and $198 and $600 in operating income from CSZ-IC for the three-month periods ended March 31, 2019 and 2018, respectively. On February 1, 2019, we completed the sale of CSZ-IC.

Automotive and Industrial segment product revenues by product category for the three months ended March 31, 2019 and 2018 are as follows:

	Three Months Ended March 31,
	2019		2018		% Change
Climate Control Seats (CCS)	$	94,354	$	88,218	7.0		%
Seat Heaters		73,920		84,220	(12.2	)	%
Steering Wheel Heaters		16,970		17,557	(3.3	)	%
Automotive Cables		23,749		26,865	(11.6	)	%
Battery Thermal Management (BTM)^(a)		10,745		4,161	158.2		%
Electronics		12,852		15,188	(15.4	)	%
Other Automotive		9,767		6,212	57.2		%
Subtotal Automotive	$	242,357	$	242,421	—		%
Remote Power Generation (GPT)		3,959		4,662	(15.1	)	%
Industrial Chambers		3,418		10,213	(66.5	)	%
Gentherm Medical		8,187		7,290	12.3		%
Subtotal Industrial	$	15,564	$	22,165	(29.8	)	%
Total Company	$	257,921	$	264,586	(2.5	)	%

Battery Thermal Management or BTM product revenues include Gentherm’s automotive grade, low cost, heat resistant fans and blowers used by customer for battery cooling through ventilation and production level shipments of the advanced TED based active cool system.

Note 4 – Segment Reporting – Continued

Total product revenues information by geographic area is as follows (based on shipment destination):

	Three Months Ended March 31,
	2019				2018
United States	$	118,454	46	%	$	120,350	46	%
Germany		23,210	9	%		22,362	8	%
Japan		18,591	7	%		13,573	5	%
China		15,597	6	%		24,204	9	%
South Korea		14,978	6	%		13,822	5	%
Czech Republic		12,142	5	%		11,715	5	%
Canada		10,291	4	%		13,113	5	%
United Kingdom		8,832	3	%		10,845	4	%
Romania		6,922	3	%		6,298	2	%
Other		28,904	11	%		28,304	11	%
Total Non-U.S.		139,467	54	%		144,236	54	%
	$	257,921	100	%	$	264,586	100	%

Debt

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Debt

Note 5 – Debt

Amended Credit Agreement

The Company has an outstanding credit agreement (the “Credit Agreement”) with a consortium of lenders and Bank of America, N.A., as administrative agent. The Credit Agreement provides the Company a revolving credit note (“U.S. Revolving Note”) with a maximum borrowing capacity of $350,000.

All subsidiary borrowers and guarantors participating in the Credit Agreement have entered into a related pledge and security agreement. The security agreement grants a security interest to the lenders in substantially all of the personal property of subsidiaries designated as borrowers to secure their respective obligations under the Credit Agreement, including the stock and membership interests of specified subsidiaries (limited to 66% of the stock in the case of certain non-U.S. subsidiaries). The Credit Agreement restricts the amount of dividend payments the Company can make to shareholders.

The Credit Agreement requires the Company to maintain a minimum Consolidated Interest Coverage Ratio and Consolidated Leverage Ratio. Definitions for these financial ratios are provided in the Credit Agreement.

Under the Credit Agreement, U.S. Dollar denominated loans bear interest at either a base rate (“Base Rate Loans”) or Eurocurrency rate (“Eurocurrency Rate Loans”), plus a margin (“Applicable Rate”). The rate for Base Rate Loans is equal to the highest of the Federal Funds Rate (2.43% at March 31, 2019) plus 0.50%, Bank of America’s prime rate (5.50% at March 31, 2019), or a one-month Eurocurrency rate (0.00% at March 31, 2019) plus 1.00%. The rate for Eurocurrency Rate Loans denominated in U.S. Dollars is equal to the London Interbank Offered Rate (2.49% at March 31, 2019). All loans denominated in a currency other than the U.S. Dollar must be Eurocurrency Rate Loans. Interest is payable at least quarterly.

The Applicable Rate varies based on the Consolidated Leverage Ratio reported by the Company. As long as the Company is not in default of the terms and conditions of the Credit Agreement, the lowest and highest possible Applicable Rate is 1.25% and 2.00%, respectively, for Eurocurrency Rate Loans and 0.25% and 1.00%, respectively, for Base Rate Loans.

The Company also has two fixed interest rate loans with the German Investment Corporation (“DEG”), a subsidiary of KfW Banking Group, a Germany government-owned development bank.

Note 5 – Debt – Continued

DEG China Loan

The first DEG loan, a loan we used to fund capital investments in China (the “DEG China Loan”), is subject to semi-annual principal payments that began March, 2015 and will end September, 2019. Under the terms of the DEG China Loan, the Company must maintain a minimum Debt-to-Equity Ratio, Current Ratio and Debt Service Coverage Ratio, as defined by the DEG China Loan agreement, based on the financial statements of Gentherm’s wholly owned subsidiary, Gentherm Automotive Systems (China) Ltd.

DEG Vietnam Loan

The Company’s second fixed interest rate loan agreement with DEG was used to finance the construction and set up of the Vietnam production facility (“DEG Vietnam Loan”). The DEG Vietnam Loan is subject to semi-annual principal payments that began November, 2017 and will end May, 2023. Under the terms of the DEG Vietnam Loan, the Company must maintain a minimum Equity Ratio and Enhanced Equity Ratio, as defined by the DEG Vietnam Loan agreement, based on the financial statements of Gentherm’s wholly owned subsidiary, Gentherm Vietnam Co. Ltd.

Undrawn borrowing capacity under the U.S. Revolving Note was $261,071 as of March 31, 2019. The following table summarizes the Company’s debt at March 31, 2019 and at December 31, 2018.

	March 31, 2019						December 31, 2018
	Interest Rate			Principal Balance			Principal Balance
Credit Agreement:
U.S. Revolving Note (U.S. Dollar Denominations)		4.00	%	$	81,000		$	122,000
U.S. Revolving Note (Euro Denominations)		1.50	%		7,854			5,727
DEG China Loan		4.25	%		449			913
DEG Vietnam Loan		5.21	%		11,250			11,250
Total debt					100,553			139,890
Current portion					(2,949	)		(3,413	)
Long-term debt, less current maturities				$	97,604		$	136,477

The scheduled principal maturities of our debt as of March 31, 2019 are as follows:

Year	U.S. Revolving Note		DEG China Note		DEG Vietnam Note		Total
Remainder of 2019	$	—	$	449	$	2,500	$	2,949
2020		—		—		2,500		2,500
2021		88,854		—		2,500		91,354
2022		—		—		2,500		2,500
2023		—		—		1,250		1,250
Total	$	88,854	$	449	$	11,250	$	100,553

Principal outstanding under the U.S. Revolving Note will be due and payable in full on March 17, 2021. As of March 31, 2019, we were in compliance, in all material respects, with all terms as outlined in the Credit Agreement, DEG China Loan and DEG Vietnam Loan.

Derivative Financial Instruments

3 Months Ended

Mar. 31, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note 6 – Derivative Financial Instruments

We are exposed to market risk from changes in foreign currency exchange rates, short-term interest rates and price fluctuations of certain material commodities such as copper. Market risks for changes in interest rates relate primarily to our debt obligations under our Credit Agreement. Foreign currency exchange risks are attributable to sales to foreign customers and purchases from foreign suppliers not denominated in a location’s functional currency, foreign plant operations, intercompany indebtedness, intercompany investments and include exposures to the European Euro, Mexican Peso, Canadian Dollar, Hungarian Forint, Macedonian Denar, Ukrainian Hryvnia, Japanese Yen, Chinese Renminbi, Korean Won and Vietnamese Dong.

The Company regularly enters into derivative contracts with the objective of managing its financial and operational exposure arising from these risks by offsetting gains and losses on the underlying exposures with gains and losses on the financial instruments used to hedge them. The maximum length of time over which we hedge our exposure to foreign currency exchange risks is one year. We had foreign currency derivative contracts with a notional value of $24,114 and $33,250 outstanding as of March 31, 2019 and December 31, 2018, respectively.

The maximum length of time over which we hedge our exposure to price fluctuations in material commodities is two years. No commodity swap contracts were outstanding at March 31, 2019 or at December 31, 2018.

We do not enter into derivative financial instruments for speculative or trading purposes. Our hedging relationships are formally documented at the inception of the hedge, and hedges must be highly effective in offsetting changes to future cash flows on hedged transactions both at the inception of a hedge and on an ongoing basis to be designated for hedge accounting treatment. For derivative contracts which can be classified as a cash flow hedge, the effective portion of the change in the fair value of the derivative is recorded to accumulated other comprehensive loss in the consolidated balance sheet. When the underlying hedge transaction is realized, the gain or loss included in accumulated other comprehensive loss is recorded in earnings in the consolidated statement of income on the same line as the gain or loss on the hedged item attributable to the hedged risk. We record the ineffective portion of foreign currency hedging instruments, if any, to foreign currency gain (loss) in the consolidated statements of income. See Note 8 for the amount of unrealized loss associated with foreign currency derivatives reported in accumulated other comprehensive income as of December 31, 2018 that was reclassified into earnings during 2019. Though we continuously monitor the hedging program, derivative positions and hedging strategies, foreign currency forward exchange agreements have not always been designated as hedging instruments for accounting purposes.

The Company uses an income approach to value derivative instruments, analyzing quoted market prices to calculate the forward values and then discounts such forward values to the present value using benchmark rates at commonly quoted intervals for the instrument’s full term.

Information related to the recurring fair value measurement of derivative instruments in our consolidated condensed balance sheet as of March 31, 2019 is as follows:

Asset Derivatives

Liability Derivatives

Net Asset/
(Liabilities)

Hedge

Designation

Fair Value

Hierarchy

Balance Sheet
Location

Fair
Value

Balance Sheet
Location

Fair
Value

Foreign currency derivatives

Cash flow hedge

Level 2

Current assets

857

Current liabilities

—

857

Note 6 – Derivative Financial Instruments – Continued

Information relating to the effect of derivative instruments on our consolidated condensed statements of income is as follows:

	Location	Three Months Ended March 31, 2019			Three Months Ended March 31, 2018
Foreign currency derivatives	Cost of sales	$	240		$	(81	)
	Selling, general and administrative		—			53
	Other comprehensive income		766			2,112
	Foreign currency (loss) gain		(37	)		37
Total foreign currency derivatives		$	969		$	2,121
Commodity derivatives	Cost of sales	$	—		$	145
	Other comprehensive income		—			(218	)
Total commodity derivatives		$$	—		$	(73	)

We did not incur any hedge ineffectiveness during the three-month periods ended March 31, 2019 and 2018.

Fair Value Measurement

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement

Note 7 – Fair Value Measurement

The Company bases fair value on a price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We have adopted a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three broad levels, which are described below:

Level 1: Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.

Level 2: Inputs, other than quoted market prices included in Level 1, that are observable either directly or indirectly for the asset or liability.

Level 3: Unobservable inputs that are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs.

In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible and also considers counterparty credit risk in its assessment of fair value.

Except for derivative instruments (see Note 6), pension liabilities, pension plan assets, a corporate owned life insurance policy and assets held for sale (see Note 12), the Company had no material financial assets and liabilities that are carried at fair value at March 31, 2019 and December 31, 2018. The carrying amounts of financial instruments comprising cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued liabilities approximate their fair values due to the relatively short maturity of such instruments. The Company uses an income valuation technique to measure the fair values of its debt instruments by converting amounts of future cash flows to a single present value amount using rates based on current market expectations (Level 2 inputs).

Note 7 – Fair Value Measurement – Continued

As of March 31, 2019, and December 31, 2018, the carrying values of the Company’s Credit Agreement indebtedness were not materially different than their estimated fair values because the interest rates on variable rate debt approximated rates currently available to the Company (see Note 6). Discount rates used to measure the fair value of the DEG Vietnam Loan and DEG China Loan are based on quoted swap rates. As of March 31, 2019, the carrying values of the DEG Vietnam Loan and DEG China Loan were $11,250 and $449, respectively, as compared to an estimated fair value of $11,325 and $450, respectively. As of December 31, 2018, the carrying value of the DEG Vietnam Loan and DEG China Loan were $11,250 and $913, respectively, as compared to an estimated fair value of $11,100 and $900, respectively.

Certain Company assets are required to be recorded at fair value on a non-recurring basis when events and circumstances indicate that the carrying value may not be recoverable. Management’s estimates used to record impairment expense are inherently uncertain and may change in future periods.

Reclassifications Out of Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Reclassifications Out of Accumulated Other Comprehensive Income (Loss)

Note 8 – Reclassifications Out of Accumulated Other Comprehensive Income (Loss)

Reclassification adjustments and other activities impacting accumulated other comprehensive income (loss) during the three-month period ended March 31, 2019 and 2018 are as follows:

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Foreign Currency Hedge Derivatives				Total
Balance at December 31, 2018	$	(2,339	)	$	(37,157	)	$	(4	)		$	(39,500	)
Other comprehensive income (loss) before reclassifications		—			(4,074	)		717				(3,357	)
Income tax effect of other comprehensive income (loss) before reclassifications		—			(177	)		(156	)			(333	)
Amounts reclassified from accumulated other comprehensive (income) loss into net income		—			—			49		a		49
Income taxes reclassified into net income		—			—			(11	)			(11	)
Net current period other comprehensive income (loss)		—			(4,251	)		599				(3,652	)
Balance at March 31, 2019	$	(2,339	)	$	(41,408	)	$	595			$	(43,152	)

(a)The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

Note 8 – Reclassifications Out of Accumulated Other Comprehensive Income (Loss) – Continued

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Commodity Hedge Derivatives				Foreign Currency Hedge Derivatives				Total
Balance at December 31, 2017	$	(2,366	)	$	(17,555	)	$	277			$	(800	)		$	(20,444	)
Cumulative effect of accounting change due to adoption of ASU 2018-02		(49	)		—			9				—				(40	)
Other comprehensive income (loss) before reclassifications		—			11,750			—				1,854				13,604
Income tax effect of other comprehensive income (loss) before reclassifications		—			(76	)		—				(498	)			(574	)
Amounts reclassified from accumulated other comprehensive (income) loss into net income		—			—			(218	)	a		258		a		40
Income taxes reclassified into net income		—			—			(68	)			(69	)			(137	)
Net current period other comprehensive income (loss)		(49	)		11,674			(277	)			1,545				12,893
Balance at March 31, 2018	$	(2,415	)	$	(5,881	)	$	—			$	745			$	(7,551	)

(a)	The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

We expect all of the existing gains and losses related to foreign currency derivatives reported in accumulated other comprehensive income (loss) as of March 31, 2019 to be reclassified into earnings during the next twelve months. See Note 6 for additional information about derivative financial instruments and the effects from reclassification to net income.

Revenue Recognition

3 Months Ended

Mar. 31, 2019

Revenue Recognition And Deferred Revenue [Abstract]

Unearned Revenue

Note 9 – Revenue Recognition

The aggregate amount of transaction price allocated to material rights that remain unsatisfied as of March 31, 2019 is $1,383. We expect to recognize into revenue, 58% of this balance in the next 9 months, and the remaining 21%, 12%, 5% and 4% in 2020, 2021, 2022 and 2023, respectively.

Unearned revenue by segment was as follows:

	March 31, 2019		December 31, 2018
Automotive	$	1,383	$	1,597
Industrial		—		—
Total	$	1,383	$	1,597

Note 9 – Revenue Recognition – Continued

Changes in unearned revenue were as follows:

Three Months Ended March 31, 2019
Balance, beginning of period	$	1,597
Additions to unearned revenue		227
Reclassified to revenue		(281	)
Reclassified to held for sale		(161	)
Currency impacts		1
Balance, end of period	$	1,383

Revenue allocated to remaining performance obligations represents contracted revenue that has not yet been recognized, which includes unearned revenue and amounts that will be invoiced and recognized as revenue in future periods.

Total costs to obtain a contract that were recognized on the consolidated condensed balance sheets as of March 31, 2019 and December 31, 2018 were immaterial.

New Accounting Pronouncements

3 Months Ended

Mar. 31, 2019

New Accounting Pronouncements And Changes In Accounting Principles [Abstract]

New Accounting Pronouncements

Note 10 – New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Leases

In February 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standard Update (ASU) 2016-02, “Leases (Topic 842).” Topic 842 was subsequently amended by ASU 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU 2018-10, Codification Improvements to Topic 842, Leases; and ASU 2018-11, Targeted Improvements. The update and related amendments require lessees to recognize on their balance sheet a liability to make payments and a right-of-use asset representing its right to use the underlying asset for the lease term. Leases are to be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the statement of income.

The update’s requirement to recognize the rights and obligations resulting from leases as assets and liabilities by lessees increases transparency and comparability of lease transactions between organizations. New lessee disclosure requirements to provide information about the use of significant assumptions and judgements to identify and measure right-of-use assets and lease liabilities enhance the representation of leasing transactions in financial statement note disclosures.

We elected to adopt ASU 2016-02 and related amendments on its effective date, January 1, 2019, and recognized a cumulative-effect adjustment to the opening balance in retained earnings. Financial information has not been updated and disclosure under the new standard have not been provided to dates and periods before January 1, 2019. We elected the package of practical expedients provided in ASU 2016-02, which permits companies not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We elected the use-of-hindsight to determine whether lease terms include periods covered by the lessee’s option to extend or terminate a lease, whether to purchase the underlying asset at the end of the lease agreement, and in assessing impairment of operating lease right-of-use assets. Finally, we elected not to assess whether existing or expired land easements that were not previously accounted for as leases are or contain a lease. Land easements previously accounted for as leases are not eligible for this practical expedient.

ASU 2016-02 did not have an impact on our consolidated condensed statement of income for the three-month period ended March 31, 2019, but had a significant impact on our consolidated condensed balance sheet as of March 31, 2019. Gentherm recognized $17,146 and $16,697 in new operating lease right-of-use assets and lease liabilities, respectively, on our consolidated condensed balance sheet for the right to use lease assets, a difference of $449. Gentherm recognized $261 of this difference as an adjustment to the 2019 opening balance in retained earnings, net of tax effects totaling $114. The remaining $74 difference between operating lease right-of-use assets and lease liabilities for leases that existed as of the adoption date was recognized as a reduction to prepaid and other current assets.

Note 10 – New Accounting Pronouncements – Continued

ASU 2016-02 provides lessees with practical expedients applicable on an ongoing basis, beyond the period of adoption. First, lessees may elect, by class of underlying asset, to not recognize operating lease right-of-use assets and lease liabilities from leases with an original lease term of 12 months or less. For entities that elect this accounting policy for short term leases, lease payments from short term leases are recognized on a straight-line basis over the lease term in the Company’s consolidated condensed statement of income. Second, lessees may elect, by class of underlying assets, to not separate nonlease components that are associated with lease components in a lease agreement and instead to account for them together as a single lease component. The Company elected these ongoing practical expedients during the three-month period March 31, 2019 and applied them to all classes of leased assets.

Derivatives and Hedging

In October 2018, the FASB issued ASU 2018-16, “Derivatives and Hedging (Topic 815): Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes.” ASU 2018-16 adds the OIS Rate based on SOFR to the list of eligible benchmark interest rates that can be used for hedge accounting purposes under Topic 815. SOFR is a volume-weighted median interest rate that is calculated daily based on overnight transactions from the prior day’s trading activity in specified segments of the U.S. Treasury repo market. The designation of the OIS rate based on SOFR as a benchmark interest rate for hedge accounting purposes is in response to ongoing concerns about the sustainability of LIBOR and the Federal Reserve’s intent to have a suitable alternative to USD LIBOR that is more firmly based on actual transactions in a robust market. Prior to this update, the only eligible benchmark interest rates were the interest rates on direct Treasury obligations of the U.S. government (UST), the LIBOR swap rate, the OIS Rate based on the Fed Funds Effective Rate and the Securities Industry and Financial Markets Association (SIFMA) Municipal Swap Rate.

ASU 2018-16 is effective for annual and interim periods beginning after December 15, 2018. Early adoption of the amendments in this update is permitted. The amendments in this update should be adopted on a prospective basis for qualifying new or redesigned hedging relationships entered into on or after the date of adoption. We have adopted ASU 2018-16 and related amendments effective January 1, 2019. Since we did not execute any U.S. benchmark interest rate transactions during the adoption of this update and related amendments, the update and related amendments did not have an impact on the Company’s financial statements for three-month period ended March 31, 2019.

Recently Issued Accounting Pronouncements Not Yet Adopted

Cloud Computing Arrangements That Are Service Contracts

In August 2018, the FASB issued ASU 2018-15, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” ASU 2018-15 provides guidance on when costs incurred to implement a hosting arrangement that is a service contract are and are not capitalized, aligning with the guidance for capitalizing implementation costs incurred to develop or obtain internal-use software. Entities must first determine the project stage of the implementation activity; depending on their nature, costs for implementation activities in the application development stage are capitalized and costs incurred during the preliminary project and post-implementation stages are expensed as the activities are performed. Capitalized implementation costs should be amortized over the term of the hosting arrangement on a straight-line basis and presented in the same line items in the statement of income as the expense for fees for the associated hosting arrangements. Similarly, capitalized implementation costs should be presented in same line item in the balance sheet as prepaid fees for the associated hosting arrangement and cash flows from capitalized implementation costs should be classified in the same manner as cash flows for the fees for the associated hosting arrangement.

ASU 2018-15 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments in this update is permitted, including adoption in any interim period for which financial statements have not yet been issued. ASU 2018-15 permits two methods of adoption: prospectively to costs for activities performed on or after the date the entity first applies the content from the update, or retrospectively to all periods presented. We are currently in the process of determining the impact implementation of ASU 2018-15 will have on the Company’s financial statements and note disclosures.

Note 10 – New Accounting Pronouncements – Continued

Retirement Benefits

In August 2018, the FASB issued ASU 2018-14, “Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans.” The amendments in ASU 2018-14 were developed using the concepts incorporated in the FASB’s Concepts Statement, Conceptual Framework for Financial Reporting – Chapter 8: Notes to Financial Statements, which were finalized in August 2018. The amendments in this update remove the following disclosure requirements, among others, from Subtopic 715-20:

The amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year.

The amount and timing of plan assets expected to be returned to the employer.

The following disclosure requirements were added to Subtopic 715-20:

The weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates.

An explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period.

ASU 2018-14 is effective for annual periods ending after December 15, 2020. Early adoption of the amendments in this update are permitted. Entities should apply the amendments in this update on a retrospective basis to all periods presented. We are currently in the process of determining the impact implementation of ASU 2018-14 will have on the Company’s financial statement note disclosures.

Fair Value Measurement

In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.” The amendments in ASU 2018-13 were developed using the concepts incorporated in the FASBs Concepts Statement, Conceptual Framework for Financial Reporting – Chapter 8: Notes to Financial Statements, which were finalized in August 2018. The amendments in this update remove the following disclosure requirements from Topic 820:

The amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy.

The policy for timing of transfer between levels.

The valuation processes for Level 3 fair value measurements.

The following disclosure requirements were added to Topic 820:

The changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period.

The range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements.

ASU 2018-13 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of disclosures that are removed is permitted, but adoption is delayed for the new additional disclosures until their effective date. The amendments in ASU 2018-13 that provide for new additional disclosure should be applied on a prospective basis, while all other amendments should be applied retrospectively to all periods presented upon their effective date. We are currently in the process of determining the impact implementation of ASU 2018-13 will have on the Company’s financial statement note disclosures.

Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases

Note 11 – Leases

The Company has operating leases for office, manufacturing and research and development facilities, as well as leases for the ground with which certain manufacturing facilities sit atop. We also have operating leases for office equipment and automobiles. Excluding ground leases, our leases have remaining lease terms ranging from 1 year to 8 years and may include options to extend the lease for an additional term equal to the original term of the lease. Ground operating leases have remaining lease terms that range from 30 to 45 years and some which specify that the end of the lease term is at the discretion of the lessee. We do not have lease arrangements with related parties.

Information about Gentherm’s total lease costs for the three months ended March 31, 2019 is as follows:

Three Months Ended March 31, 2019
Lease cost
Operating lease cost	$	1,333
Short-term lease cost		955
Sublease income		(13	)
Total lease cost	$	2,275
Supplemental Cash Flow Information
Gain on sale and leaseback transactions, net	$	207
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,392
Right-of-use lease assets obtained in exchange for lease obligations:
Operating leases	$	2,234
Weighted Average Remaining Lease Term
Operating leases		5.7 years
Weighted Average Discount Rate
Operating leases		5.4	%

A summary of operating leases as of March 31, 2019, under all non-cancellable operating leases with terms exceeding one year is as follows:


2019 (excluding the three-month period ended March 31, 2019)	$	4,100
2020		4,434
2021		2,598
2022		1,626
2023		934
2024 or later		2,726
Total future minimum lease payments		16,418
Less imputed interest		(2,908	)
Total		13,510

Assets and Liabilities Held for Sale

3 Months Ended

Mar. 31, 2019

Discontinued Operations And Disposal Groups [Abstract]

Assets and Liabilities Held for Sale

Note 12 – Assets and Liabilities Held for Sale

During 2018, the Company determined that GPT met the held for sale criteria and recognized $2,190 in impairment loss on assets held for sale. During the three-month period ended March 31, 2019, the Company determined an equity investment met the held for sale criteria and recognized an impairment of $3,486. During the three-month period ended March 31, 2019, the Company recognized and additional $6,998 in impairment losses on assets held for sale. See Note 2 for information about the Company’s held for sale accounting policy, including a description of the criteria necessary for a disposal group to qualify for classification as held for sale. GPT did not meet the criteria to be classified as a discontinued operation.

The assets and liabilities of the disposal group classified as held for sale as of March 31, 2019 are as follows:

Accounts receivable, net	$	2,149
Inventory, net		5,891
Prepaid expenses and other assets		240
Operating lease right-of-use assets		4,143
Investment		1,000
Property and equipment, net		7,291
Other intangible assets, net		993
Deferred income tax assets		4,490
Impairment loss		(9,188	)
Total assets held for sale	$	17,009

Accounts payable	$	536
Accrued liabilities		2,326
Operating lease liabilities		4,147
Total liabilities held for sale	$	7,009

Management’s estimates used to record impairment expense are inherently uncertain and may change in future periods.

Summary of Significant Accounting Policies and Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Accounting Principles

Consolidation

Use of Estimates

Cash, cash equivalents and restricted cash

Year	March 31, 2019		December 31, 2018		March 31, 2018		December 31, 2017
Cash and cash equivalents presented in the consolidated condensed balance sheets	$	38,769	$	39,620	$	70,482	$	103,172
Restricted cash		2,500		—		—		—
Cash, cash equivalents and restricted cash presented in the consolidated condensed statements of cash flows	$	41,269	$	39,620	$	70,482	$	103,172

Leases

Impairments of Goodwill and Other Intangible Assets

Note 2 – Summary of Significant Accounting Policies and Basis of Presentation – Continued

There were no events or changes in circumstances which would indicate goodwill was impaired or potentially impaired during the three-months ended March 31, 2019.

A rolled forward reconciliation of goodwill from December 31, 2018 to March 31, 2019 is as follows:

Three Months Ended March 31, 2019
Balance, beginning of period	$	55,311
Currency impact		(590	)
Balance, end of period	$	54,721

Assets and Liabilities Held for Sale

Recently Adopted Accounting Pronouncements

Leases

Note 10 – New Accounting Pronouncements – Continued

Derivatives and Hedging

Recently Issued Accounting Pronouncements Not Yet Adopted

Cloud Computing Arrangements That Are Service Contracts

Note 10 – New Accounting Pronouncements – Continued

Retirement Benefits

The amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year.

The amount and timing of plan assets expected to be returned to the employer.

The following disclosure requirements were added to Subtopic 715-20:

The weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates.

An explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period.

Fair Value Measurement

The amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy.

The policy for timing of transfer between levels.

The valuation processes for Level 3 fair value measurements.

The following disclosure requirements were added to Topic 820:

The changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period.

The range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements.

The Company and Subsequent Events (Tables)

3 Months Ended

Mar. 31, 2019

Restructuring And Related Activities [Abstract]

Summary of Reconciliation of Restructuring Liability

A reconciliation of the beginning and ending restructuring liability is as follows:

	One-Time Employee Termination Benefit Costs			Contract Termination Costs			Consulting Costs			Asset Disposal Costs			Total
Three Months Ended March 31, 2019
Balance, beginning of period	$	2,079		$	389		$	79		$	—		$	2,547
Additions, charged to restructuring expenses		646			4			839			425			1,914
Payments		(1,675	)		(88	)		(915	)		(425	)		(3,103	)
Balance, end of period	$	1,050		$	305		$	3		$	—		$	1,358

Summary of Significant Accounting Policies and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Reconciliation of Cash and Cash Equivalents and Restricted Cash

. A reconciliation of cash and cash equivalents on the consolidated condensed balance sheets to cash, cash equivalents and restricted cash presented on the consolidated condensed statements of cash flows is as follows:

Year	March 31, 2019		December 31, 2018		March 31, 2018		December 31, 2017
Cash and cash equivalents presented in the consolidated condensed balance sheets	$	38,769	$	39,620	$	70,482	$	103,172
Restricted cash		2,500		—		—		—
Cash, cash equivalents and restricted cash presented in the consolidated condensed statements of cash flows	$	41,269	$	39,620	$	70,482	$	103,172

Schedule of Reconciliation of Goodwill

A rolled forward reconciliation of goodwill from December 31, 2018 to March 31, 2019 is as follows:

Three Months Ended March 31, 2019
Balance, beginning of period	$	55,311
Currency impact		(590	)
Balance, end of period	$	54,721

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Basic and Diluted Shares of Consolidated Condensed Statements of Income

The following summarizes the Common Stock included in the basic and diluted shares, as disclosed on the face of the consolidated condensed statements of income:

	Three Months Ended March 31,
	2019		2018
Weighted average number of shares for calculation of basic EPS		33,573,411		36,766,411
Stock options, restricted stock awards and restricted stock units under equity incentive plans		159,924		106,996
Weighted average number of shares for calculation of diluted EPS		33,733,335		36,873,407

Common Stock Issuable upon Exercise of Certain Stock Options

	Three Months Ended March 31,
	2019		2018
Stock options under equity incentive plans		396,500		1,914,150

Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss)

Note 4 – Segment Reporting – Continued

Three Months Ended March 31,	Automotive		Industrial⁽¹⁾			Reconciling Items			Consolidated Total

2019:
Product revenues	$	242,357	$	15,564		$	—		$	257,921
Depreciation and amortization		10,296		290			466			11,052
Operating income (loss)		39,896		(4,514	)		(13,537	)		21,845
2018:
Product revenues⁽¹⁾	$	242,716	$	21,870		$	—		$	264,586
Depreciation and amortization		10,809		1,351			732			12,892
Operating income (loss)		41,282		(6,798	)		(13,835	)		20,649

(1)

Segment Information About Reported Segment Product Revenues by Product Category

Automotive and Industrial segment product revenues by product category for the three months ended March 31, 2019 and 2018 are as follows:

	Three Months Ended March 31,
	2019		2018		% Change
Climate Control Seats (CCS)	$	94,354	$	88,218	7.0		%
Seat Heaters		73,920		84,220	(12.2	)	%
Steering Wheel Heaters		16,970		17,557	(3.3	)	%
Automotive Cables		23,749		26,865	(11.6	)	%
Battery Thermal Management (BTM)^(a)		10,745		4,161	158.2		%
Electronics		12,852		15,188	(15.4	)	%
Other Automotive		9,767		6,212	57.2		%
Subtotal Automotive	$	242,357	$	242,421	—		%
Remote Power Generation (GPT)		3,959		4,662	(15.1	)	%
Industrial Chambers		3,418		10,213	(66.5	)	%
Gentherm Medical		8,187		7,290	12.3		%
Subtotal Industrial	$	15,564	$	22,165	(29.8	)	%
Total Company	$	257,921	$	264,586	(2.5	)	%

Product Revenues Information by Geographic Area

Note 4 – Segment Reporting – Continued

Total product revenues information by geographic area is as follows (based on shipment destination):

	Three Months Ended March 31,
	2019				2018
United States	$	118,454	46	%	$	120,350	46	%
Germany		23,210	9	%		22,362	8	%
Japan		18,591	7	%		13,573	5	%
China		15,597	6	%		24,204	9	%
South Korea		14,978	6	%		13,822	5	%
Czech Republic		12,142	5	%		11,715	5	%
Canada		10,291	4	%		13,113	5	%
United Kingdom		8,832	3	%		10,845	4	%
Romania		6,922	3	%		6,298	2	%
Other		28,904	11	%		28,304	11	%
Total Non-U.S.		139,467	54	%		144,236	54	%
	$	257,921	100	%	$	264,586	100	%

Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Summary of Company's Debt

The following table summarizes the Company’s debt at March 31, 2019 and at December 31, 2018.

	March 31, 2019						December 31, 2018
	Interest Rate			Principal Balance			Principal Balance
Credit Agreement:
U.S. Revolving Note (U.S. Dollar Denominations)		4.00	%	$	81,000		$	122,000
U.S. Revolving Note (Euro Denominations)		1.50	%		7,854			5,727
DEG China Loan		4.25	%		449			913
DEG Vietnam Loan		5.21	%		11,250			11,250
Total debt					100,553			139,890
Current portion					(2,949	)		(3,413	)
Long-term debt, less current maturities				$	97,604		$	136,477

Principal Maturities of Debt

The scheduled principal maturities of our debt as of March 31, 2019 are as follows:

Year	U.S. Revolving Note		DEG China Note		DEG Vietnam Note		Total
Remainder of 2019	$	—	$	449	$	2,500	$	2,949
2020		—		—		2,500		2,500
2021		88,854		—		2,500		91,354
2022		—		—		2,500		2,500
2023		—		—		1,250		1,250
Total	$	88,854	$	449	$	11,250	$	100,553

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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+ Details

Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Information related to the recurring fair value measurement of derivative instruments in our consolidated condensed balance sheet as of March 31, 2019 is as follows:

Asset Derivatives

Liability Derivatives

Net Asset/
(Liabilities)

Hedge

Designation

Fair Value

Hierarchy

Balance Sheet
Location

Fair
Value

Balance Sheet
Location

Fair
Value

Foreign currency derivatives

Cash flow hedge

Level 2

Current assets

857

Current liabilities

—

857

Information relating to the effect of derivative instruments on our consolidated condensed statements of income is as follows:

	Location	Three Months Ended March 31, 2019			Three Months Ended March 31, 2018
Foreign currency derivatives	Cost of sales	$	240		$	(81	)
	Selling, general and administrative		—			53
	Other comprehensive income		766			2,112
	Foreign currency (loss) gain		(37	)		37
Total foreign currency derivatives		$	969		$	2,121
Commodity derivatives	Cost of sales	$	—		$	145
	Other comprehensive income		—			(218	)
Total commodity derivatives		$$	—		$	(73	)

Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Schedule of Reclassification Adjustments and Other Activities Impacting Accumulated Other Comprehensive Income (Loss)

Reclassification adjustments and other activities impacting accumulated other comprehensive income (loss) during the three-month period ended March 31, 2019 and 2018 are as follows:

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Foreign Currency Hedge Derivatives				Total
Balance at December 31, 2018	$	(2,339	)	$	(37,157	)	$	(4	)		$	(39,500	)
Other comprehensive income (loss) before reclassifications		—			(4,074	)		717				(3,357	)
Income tax effect of other comprehensive income (loss) before reclassifications		—			(177	)		(156	)			(333	)
Amounts reclassified from accumulated other comprehensive (income) loss into net income		—			—			49		a		49
Income taxes reclassified into net income		—			—			(11	)			(11	)
Net current period other comprehensive income (loss)		—			(4,251	)		599				(3,652	)
Balance at March 31, 2019	$	(2,339	)	$	(41,408	)	$	595			$	(43,152	)

(a)The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Commodity Hedge Derivatives				Foreign Currency Hedge Derivatives				Total
Balance at December 31, 2017	$	(2,366	)	$	(17,555	)	$	277			$	(800	)		$	(20,444	)
Cumulative effect of accounting change due to adoption of ASU 2018-02		(49	)		—			9				—				(40	)
Other comprehensive income (loss) before reclassifications		—			11,750			—				1,854				13,604
Income tax effect of other comprehensive income (loss) before reclassifications		—			(76	)		—				(498	)			(574	)
Amounts reclassified from accumulated other comprehensive (income) loss into net income		—			—			(218	)	a		258		a		40
Income taxes reclassified into net income		—			—			(68	)			(69	)			(137	)
Net current period other comprehensive income (loss)		(49	)		11,674			(277	)			1,545				12,893
Balance at March 31, 2018	$	(2,415	)	$	(5,881	)	$	—			$	745			$	(7,551	)

(a)	The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2019

Revenue Recognition And Deferred Revenue [Abstract]

Schedule of Unearned Revenue by Segment Table Text Block

Unearned revenue by segment was as follows:

	March 31, 2019		December 31, 2018
Automotive	$	1,383	$	1,597
Industrial		—		—
Total	$	1,383	$	1,597

Schedule of Changes in Unearned Revenue

Note 9 – Revenue Recognition – Continued

Changes in unearned revenue were as follows:

Three Months Ended March 31, 2019
Balance, beginning of period	$	1,597
Additions to unearned revenue		227
Reclassified to revenue		(281	)
Reclassified to held for sale		(161	)
Currency impacts		1
Balance, end of period	$	1,383

Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Summary of Total Lease Costs

Information about Gentherm’s total lease costs for the three months ended March 31, 2019 is as follows:

Three Months Ended March 31, 2019
Lease cost
Operating lease cost	$	1,333
Short-term lease cost		955
Sublease income		(13	)
Total lease cost	$	2,275
Supplemental Cash Flow Information
Gain on sale and leaseback transactions, net	$	207
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,392
Right-of-use lease assets obtained in exchange for lease obligations:
Operating leases	$	2,234
Weighted Average Remaining Lease Term
Operating leases		5.7 years
Weighted Average Discount Rate
Operating leases		5.4	%

Summary of Operating Leases Under all Non-Cancellable Operating Leases

A summary of operating leases as of March 31, 2019, under all non-cancellable operating leases with terms exceeding one year is as follows:


2019 (excluding the three-month period ended March 31, 2019)	$	4,100
2020		4,434
2021		2,598
2022		1,626
2023		934
2024 or later		2,726
Total future minimum lease payments		16,418
Less imputed interest		(2,908	)
Total		13,510

Assets and Liabilities Held for Sale (Tables)

3 Months Ended

Mar. 31, 2019

Discontinued Operations And Disposal Groups [Abstract]

Summary of Assets and Liabilities of Disposal Group Classified as Held for Sale

The assets and liabilities of the disposal group classified as held for sale as of March 31, 2019 are as follows:

Accounts receivable, net	$	2,149
Inventory, net		5,891
Prepaid expenses and other assets		240
Operating lease right-of-use assets		4,143
Investment		1,000
Property and equipment, net		7,291
Other intangible assets, net		993
Deferred income tax assets		4,490
Impairment loss		(9,188	)
Total assets held for sale	$	17,009

Accounts payable	$	536
Accrued liabilities		2,326
Operating lease liabilities		4,147
Total liabilities held for sale	$	7,009

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

+ References

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+ Details

The Company and Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended		12 Months Ended
	Apr. 01, 2019	Feb. 01, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Company And Subsequent Events [Line Items]
Pre-tax gain on sale of business			$ 4,970
Restructuring expenses			1,914	$ 865
Restructuring liabilities			$ 1,358		$ 2,547
Business acquisition, date of acquisition agreement			Apr. 01, 2019
Subsequent Event
Company And Subsequent Events [Line Items]
Payments to acquire businesses gross	$ 15,000
Business combination future contingent consideration milestone payment	$ 1,700
Automotive Segments
Company And Subsequent Events [Line Items]
Restructuring expenses			$ 368
Industrial Segments
Company And Subsequent Events [Line Items]
Restructuring expenses			1,546
One-Time Employee Termination Benefit Costs
Company And Subsequent Events [Line Items]
Restructuring expenses			646
Restructuring liabilities			1,050		2,079
Contract Termination Costs
Company And Subsequent Events [Line Items]
Restructuring expenses			4
Restructuring liabilities			305		389
Fit-for-Growth \| One-Time Employee Termination Benefit Costs
Company And Subsequent Events [Line Items]
Restructuring expenses			395	0
Fit-for-Growth \| Contract Termination Costs
Company And Subsequent Events [Line Items]
Restructuring expenses			4	$ 0
GPT and CSZ-IC \| One-Time Employee Termination Benefit Costs
Company And Subsequent Events [Line Items]
Restructuring expenses			251
GPT and CSZ-IC \| Consultant Costs
Company And Subsequent Events [Line Items]
Restructuring expenses					$ 839
CSZ-IC
Company And Subsequent Events [Line Items]
Total cash proceeds		$ 47,500
Escrow deposit		$ 2,500
Pre-tax gain on sale of business			$ 4,970

The Company and Subsequent Events - Summary of Reconciliation of Beginning and Ending Restructuring Liability (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	$ 2,547
Additions, charged to restructuring expenses	1,914	$ 865
Payments	(3,103)
Balance, end of period	1,358
One-Time Employee Termination Benefit Costs
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	2,079
Additions, charged to restructuring expenses	646
Payments	(1,675)
Balance, end of period	1,050
Contract Termination Costs
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	389
Additions, charged to restructuring expenses	4
Payments	(88)
Balance, end of period	305
Consulting Costs
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period	79
Additions, charged to restructuring expenses	839
Payments	(915)
Balance, end of period	3
Asset Disposal Costs
Restructuring Cost And Reserve [Line Items]
Additions, charged to restructuring expenses	425
Payments	$ (425)

Summary of Significant Accounting Policies and Basis of Presentation (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basis Of Presentation And Accounting Policies [Line Items]
Operating lease, right of use asset	$ 14,058,000
Operating lease, liabilities	13,510,000
Operating Lease Term of 12 Months or Less
Basis Of Presentation And Accounting Policies [Line Items]
Operating lease, right of use asset	0
Operating lease, liabilities	$ 0
Maximum
Basis Of Presentation And Accounting Policies [Line Items]
Operating lease, term of contract	12 months
Customer Relationship
Basis Of Presentation And Accounting Policies [Line Items]
Amortization of intangible assets		$ 2,697,000

Reconciliation of Cash and Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Cash and cash equivalents presented in the consolidated condensed balance sheets	$ 38,769	$ 39,620	$ 70,482	$ 103,172
Restricted cash	2,500
Cash, cash equivalents and restricted cash presented in the consolidated condensed statements of cash flows	$ 41,269	$ 39,620	$ 70,482	$ 103,172

Summary of Reconciliation of Goodwill (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill Roll Forward
Balance, beginning of period	$ 55,311
Currency impact	(590)
Balance, end of period	$ 54,721

Earnings Per Share (Detail) - shares	3 Months Ended
Earnings Per Share (Detail) - shares	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average number of shares for calculation of basic EPS	33,573,411	36,766,411
Stock options, restricted stock awards and restricted stock units under equity incentive plans	159,924	106,996
Weighted average number of shares for calculation of diluted EPS	33,733,335	36,873,407
Stock options under equity incentive plans
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock that have been excluded from the diluted shares calculation	396,500	1,914,150

Segment Reporting - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Segment Reporting Information [Line Items]
Goodwill	$ 54,721	$ 55,311
Automotive Segments
Segment Reporting Information [Line Items]
Goodwill	36,943		$ 39,666
Industrial Segments
Segment Reporting Information [Line Items]
Goodwill	$ 17,778		$ 30,773

Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 257,921	$ 264,586
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 11,052	$ 12,892
Operating income (loss)	21,845	20,649
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	242,357	242,421
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	15,564	22,165
Operating Segments \| Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	$ 242,357	$ 242,716
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 10,296	$ 10,809
Operating income (loss)	39,896	41,282
Operating Segments \| Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	$ 15,564	$ 21,870
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 290	$ 1,351
Operating income (loss)	$ (4,514)	$ (6,798)
Reconciling Items
Segment Reporting Information [Line Items]
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 466	$ 732
Operating income (loss)	$ (13,537)	$ (13,835)

Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 257,921	$ 264,586
Depreciation and amortization	11,052	12,892
Operating income (loss)	21,845	20,649
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	15,564	22,165
Industrial Segments \| CSZ-IC
Segment Reporting Information [Line Items]
Product revenues	3,418	10,213
Depreciation and amortization	0	625
Operating income (loss)	$ 198	$ 600

Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 257,921	$ 264,586
Percentage change	(2.50%)
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	$ 242,357	242,421
Automotive Segments \| Climate Control Seat (CCS)
Segment Reporting Information [Line Items]
Product revenues	$ 94,354	88,218
Percentage change	7.00%
Automotive Segments \| Seat Heaters
Segment Reporting Information [Line Items]
Product revenues	$ 73,920	84,220
Percentage change	(12.20%)
Automotive Segments \| Steering Wheel Heaters
Segment Reporting Information [Line Items]
Product revenues	$ 16,970	17,557
Percentage change	(3.30%)
Automotive Segments \| Automotive Cables
Segment Reporting Information [Line Items]
Product revenues	$ 23,749	26,865
Percentage change	(11.60%)
Automotive Segments \| Battery Thermal Management (BTM)
Segment Reporting Information [Line Items]
Product revenues	$ 10,745	4,161
Percentage change	158.20%
Automotive Segments \| Electronics
Segment Reporting Information [Line Items]
Product revenues	$ 12,852	15,188
Percentage change	(15.40%)
Automotive Segments \| Other Automotive
Segment Reporting Information [Line Items]
Product revenues	$ 9,767	6,212
Percentage change	57.20%
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	$ 15,564	22,165
Percentage change	(29.80%)
Industrial Segments \| Remote Power Generation
Segment Reporting Information [Line Items]
Product revenues	$ 3,959	4,662
Percentage change	(15.10%)
Industrial Segments \| Industrial Chambers
Segment Reporting Information [Line Items]
Product revenues	$ 3,418	10,213
Percentage change	(66.50%)
Industrial Segments \| Gentherm Medical
Segment Reporting Information [Line Items]
Product revenues	$ 8,187	$ 7,290
Percentage change	12.30%

Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended
Segment Reporting (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 257,921	$ 264,586
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember
Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Product revenues	$ 118,454	$ 120,350
United States \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	46.00%	46.00%
Germany
Segment Reporting Information [Line Items]
Product revenues	$ 23,210	$ 22,362
Germany \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	9.00%	8.00%
Japan
Segment Reporting Information [Line Items]
Product revenues	$ 18,591	$ 13,573
Japan \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	7.00%	5.00%
China
Segment Reporting Information [Line Items]
Product revenues	$ 15,597	$ 24,204
China \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	6.00%	9.00%
South Korea
Segment Reporting Information [Line Items]
Product revenues	$ 14,978	$ 13,822
South Korea \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	6.00%	5.00%
Czech Republic
Segment Reporting Information [Line Items]
Product revenues	$ 12,142	$ 11,715
Czech Republic \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	5.00%	5.00%
Canada
Segment Reporting Information [Line Items]
Product revenues	$ 10,291	$ 13,113
Canada \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	4.00%	5.00%
United Kingdom
Segment Reporting Information [Line Items]
Product revenues	$ 8,832	$ 10,845
United Kingdom \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	3.00%	4.00%
Romania
Segment Reporting Information [Line Items]
Product revenues	$ 6,922	$ 6,298
Romania \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	3.00%	2.00%
Other
Segment Reporting Information [Line Items]
Product revenues	$ 28,904	$ 28,304
Other \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	11.00%	11.00%
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 139,467	$ 144,236
Non U.S. \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	54.00%	54.00%

Debt - Additional Information (Detail)	3 Months Ended
Debt - Additional Information (Detail)	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Maximum percentage of stock of non US subsidiaries pledge to secure obligation	66.00%
Federal Funds Rate \| Minimum
Debt Instrument [Line Items]
Interest rate	0.50%
Federal Funds Rate \| Maximum
Debt Instrument [Line Items]
Interest rate	2.43%
London Interbank Offered Rate
Debt Instrument [Line Items]
Interest rate	2.49%
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Undrawn borrowing capacity	$ 261,071,000
Debt maturity date	Mar. 17, 2021
United State Bank Of America Credit Facility
Debt Instrument [Line Items]
Interest rate	5.50%
Euro Currency Rate Loans \| Minimum
Debt Instrument [Line Items]
Interest rate	0.00%
Euro Currency Rate Loans \| Minimum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	1.25%
Euro Currency Rate Loans \| Maximum
Debt Instrument [Line Items]
Interest rate	1.00%
Euro Currency Rate Loans \| Maximum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	2.00%
Base Rate Loans \| Minimum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	0.25%
Base Rate Loans \| Maximum \| Credit Agreement
Debt Instrument [Line Items]
Interest rate	1.00%
DEG Loan
Debt Instrument [Line Items]
Semi-annual principal payments earliest date	2015-03
Semi-annual principal payments latest date	2019-09
DEG Vietnam Loan
Debt Instrument [Line Items]
Semi-annual principal payments earliest date	2017-11
Semi-annual principal payments latest date	2023-05
Revolving Credit Facility \| Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 350,000,000

Summary of Company's Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 100,553	$ 139,890
Current portion	(2,949)	(3,413)
Long-term debt, less current maturities	$ 97,604	136,477
U.S. Revolving Note (U.S. Dollar Denominations)
Debt Instrument [Line Items]
Interest Rate	4.00%
Total debt	$ 81,000	122,000
U.S. Revolving Note (Euro Denominations)
Debt Instrument [Line Items]
Interest Rate	1.50%
Total debt	$ 7,854	5,727
DEG China Loan
Debt Instrument [Line Items]
Interest Rate	4.25%
Total debt	$ 449	913
DEG Vietnam Loan
Debt Instrument [Line Items]
Interest Rate	5.21%
Total debt	$ 11,250	$ 11,250

Principal Maturities of Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt maturing in remainder of 2019	$ 2,949
Debt maturing in 2020	2,500
Debt maturing in 2021	91,354
Debt maturing in 2022	2,500
Debt maturing in 2023	1,250
Total debt	100,553	$ 139,890
US and Euro Denominated Revolving Note
Debt Instrument [Line Items]
Debt maturing in 2021	88,854
Total debt	88,854
DEG China Loan
Debt Instrument [Line Items]
Debt maturing in remainder of 2019	449
Total debt	449	913
DEG Vietnam Loan
Debt Instrument [Line Items]
Debt maturing in remainder of 2019	2,500
Debt maturing in 2020	2,500
Debt maturing in 2021	2,500
Debt maturing in 2022	2,500
Debt maturing in 2023	1,250
Total debt	$ 11,250	$ 11,250

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Derivative [Line Items]
Maximum length of time to hedge exposure to foreign currency exchange risk	1 year
Maximum length of time to hedge exposure to price fluctuations in material commodities	2 years
Foreign Currency Derivatives
Derivative [Line Items]
Notional Value	$ 24,114,000		$ 33,250,000
Commodity Derivatives
Derivative [Line Items]
Notional Value	0		$ 0
Interest Rate Swap
Derivative [Line Items]
Hedge Ineffectiveness Incurred	$ 0	$ 0

Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Condensed Balance Sheet (Detail) - Fair Value, Inputs, Level 2 - Foreign Currency Derivatives - Designated as Hedging Instrument $ in Thousands	Mar. 31, 2019 USD ($)
Derivatives Fair Value [Line Items]
Net Asset/ (Liabilities)	$ 857
Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 857

Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of Income (Detail) - USD ($) $ in Thousands		3 Months Ended
	Mar. 31, 2018	Mar. 31, 2019
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 2,121	$ 969
Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(73)
Other comprehensive income \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	2,112	766
Other comprehensive income \| Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(218)
Cost of sales \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(81)	240
Cost of sales \| Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	145
Selling, general and administrative expense \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	53
Foreign currency (loss) gain \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 37	$ (37)

Fair Value Measurement - Additional Information (Detail) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial assets, fair value	$ 0	$ 0
Financial liabilities, fair value	0	0
Carrying value	100,553,000	139,890,000
DEG Vietnam Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	11,250,000	11,250,000
Fair value	11,325,000	11,100,000
DEG China Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	449,000	913,000
Fair value	$ 450,000	$ 900,000

Schedule of Reclassification Adjustments and Other Activities Impacting Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Accumulated Other Comprehensive Income Loss [Line Items]

Beginning Balance

$ (39,500)

$ (20,444)

Cumulative effect of accounting change due to adoption of ASU 2018-02

(40)

Other comprehensive income (loss) before reclassifications

(3,357)

13,604

Income tax effect of other comprehensive income (loss) before reclassifications

(333)

(574)

Amounts reclassified from accumulated other comprehensive (income) loss into net income

Income taxes reclassified into net income

(11)

(137)

Other comprehensive (loss) income, net of tax

(3,652)

12,893

Ending Balance

(43,152)

(7,551)

Defined Benefit Pension Plans

Accumulated Other Comprehensive Income Loss [Line Items]

Beginning Balance

(2,339)

(2,366)

Cumulative effect of accounting change due to adoption of ASU 2018-02

(49)

Other comprehensive (loss) income, net of tax

(49)

Ending Balance

(2,339)

(2,415)

Foreign Currency Translation Adjustments

Accumulated Other Comprehensive Income Loss [Line Items]

Beginning Balance

(37,157)

(17,555)

Other comprehensive income (loss) before reclassifications

(4,074)

11,750

Income tax effect of other comprehensive income (loss) before reclassifications

(177)

(76)

Other comprehensive (loss) income, net of tax

(4,251)

11,674

Ending Balance

(41,408)

(5,881)

Foreign Currency Hedge Derivatives

Accumulated Other Comprehensive Income Loss [Line Items]

Beginning Balance

(4)

(800)

Other comprehensive income (loss) before reclassifications

717

1,854

Income tax effect of other comprehensive income (loss) before reclassifications

(156)

(498)

Amounts reclassified from accumulated other comprehensive (income) loss into net income

^[1]

258

Income taxes reclassified into net income

(11)

(69)

Other comprehensive (loss) income, net of tax

599

1,545

Ending Balance

$ 595

745

Commodity Hedge Derivatives

Accumulated Other Comprehensive Income Loss [Line Items]

Beginning Balance

277

Cumulative effect of accounting change due to adoption of ASU 2018-02

Amounts reclassified from accumulated other comprehensive (income) loss into net income

^[1]

(218)

Income taxes reclassified into net income

(68)

Other comprehensive (loss) income, net of tax

$ (277)

[1]	The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

Revenue Recognition - Additional Information (Details 1)	Mar. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-04-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year

Revenue Recognition - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Revenue Recognition And Deferred Revenue [Abstract]
Aggregate amount of transaction price allocated to material rights that remain unsatisfied	$ 1,383
Revenue expected to be recognized in next 9 months	58.00%
Revenue expected to be recognized in 2020	21.00%
Revenue expected to be recognized in 2021	12.00%
Revenue expected to be recognized in 2022	5.00%
Revenue expected to be recognized in 2023	4.00%

Unearned Revenue By Segment (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Unearned revenue	$ 1,383	$ 1,597
Automotive Segments
Deferred Revenue Arrangement [Line Items]
Unearned revenue	$ 1,383	$ 1,597

Changes in Unearned Revenue (Detail) $ in Thousands	3 Months Ended
Changes in Unearned Revenue (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Revenue Recognition And Deferred Revenue [Abstract]
Beginning balance	$ 1,597
Additions to unearned revenue	227
Reclassified to revenue	(281)
Reclassified to held for sale	(161)
Currency impacts	1
Ending balance	$ 1,383

New Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use assets	$ 14,058
Lease liabilities	$ 13,510
ASU 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use assets		$ 17,146
Lease liabilities		16,697
Right-of-use assets and lease liabilities difference		449
Right-of-use assets and lease liabilities difference, net of tax effects		114
ASU 2016-02 \| Retained Earnings
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use assets and lease liabilities difference		261
ASU 2016-02 \| Prepaid and Other Current Assets
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use assets and lease liabilities difference		$ (74)

Leases - Additional Information (Detail)	3 Months Ended
Leases - Additional Information (Detail)	Mar. 31, 2019
Lessee Lease Description [Line Items]
Operating lease, description	The Company has operating leases for office, manufacturing and research and development facilities, as well as leases for the ground with which certain manufacturing facilities sit atop. We also have operating leases for office equipment and automobiles.
Operating lease, existence of option to extend	true
Operating lease, options to extend	Excluding ground leases, our leases have remaining lease terms ranging from 1 year to 8 years and may include options to extend the lease for an additional term equal to the original term of the lease.
Minimum
Lessee Lease Description [Line Items]
Operating lease, term of contract	1 year
Minimum \| Ground
Lessee Lease Description [Line Items]
Operating lease, term of contract	30 years
Maximum
Lessee Lease Description [Line Items]
Operating lease, term of contract	8 years
Maximum \| Ground
Lessee Lease Description [Line Items]
Operating lease, term of contract	45 years

Leases - Summary of Total Lease Costs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lease cost
Operating lease cost	$ 1,333
Short-term lease cost	955
Sublease income	(13)
Total lease cost	2,275
Gain on sale and leaseback transactions, net	207
Operating cash flows from operating leases	1,392
Operating leases	$ 2,234
Operating leases	5 years 8 months 12 days
Operating leases	5.40%

Leases - Summary of Operating Leases Under all Non-Cancellable Operating Leases (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019 (excluding the three-month period ended March 31, 2019)	$ 4,100
2020	4,434
2021	2,598
2022	1,626
2023	934
2024 or later	2,726
Total future minimum lease payments	16,418
Less imputed interest	(2,908)
Total	$ 13,510

Assets and Liabilities Held for Sale - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment loss recognized on assets held for sale	$ 9,188
GPT
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment loss recognized on assets held for sale		$ 2,190
Impairment loss on equity investment	3,486
Impairment losses on asset held for sale	$ 6,998

Assets and Liabilities Held for Sale - Summary of Assets and Liabilities of Disposal Group Classified as Held for Sale (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Discontinued Operations And Disposal Groups [Abstract]
Accounts receivable, net	$ 2,149
Inventory, net	5,891
Prepaid expenses and other assets	240
Operating lease right-of-use assets	4,143
Investment	1,000
Property and equipment, net	7,291
Other intangible assets, net	993
Deferred income tax assets	4,490
Impairment loss	(9,188)
Total assets held for sale	17,009	$ 69,699
Accounts payable	536
Accrued liabilities	2,326
Operating lease liabilities	4,147
Total liabilities held for sale	$ 7,009	$ 13,062