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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2017	Apr. 28, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
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 Common Stock, Shares Outstanding		36,748,599

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 133,907	$ 177,187
Accounts receivable, less allowance of $1,344 and $1,391, respectively	185,279	170,084
Inventory:
Raw materials	59,425	60,525
Work in process	17,070	13,261
Finished goods	31,960	31,288
Inventory, net	108,455	105,074
Derivative financial instruments	1,594	18
Prepaid expenses and other assets	43,868	36,390
Total current assets	473,103	488,753
Property and equipment, net	179,848	172,052
Goodwill	52,031	51,735
Other intangible assets, net	55,219	57,557
Deferred financing costs	1,149	1,221
Deferred income tax assets	35,931	35,299
Other non-current assets	35,397	36,413
Total assets	832,678	843,030
Current Liabilities:
Accounts payable	86,156	84,511
Accrued liabilities	64,896	105,625
Current maturities of long-term debt	2,105	2,092
Derivative financial instruments		1,395
Total current liabilities	153,157	193,623
Pension benefit obligation	7,571	7,419
Other liabilities	5,115	4,092
Long-term debt, less current maturities	161,032	169,433
Deferred income tax liabilities	8,544	8,058
Total liabilities	335,419	382,625
Common Stock:
No par value; 55,000,000 shares authorized, 36,727,501 and 36,534,464 issued and outstanding at March 31, 2017 and December 31, 2016, respectively	263,656	262,251
Paid-in capital	11,176	10,323
Accumulated other comprehensive loss	(61,393)	(69,091)
Accumulated earnings	283,820	256,922
Total shareholders’ equity	497,259	460,405
Total liabilities and shareholders’ equity	$ 832,678	$ 843,030

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,344	$ 1,391
Common Stock, par value
Common Stock, shares authorized	55,000,000	55,000,000
Common Stock, shares issued	36,727,501	36,534,464
Common Stock, shares outstanding	36,727,501	36,534,464

Consolidated Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Product revenues	$ 249,267	$ 215,714
Cost of sales	164,107	147,472
Gross margin	85,160	68,242
Operating expenses:
Net research and development expenses	19,505	15,696
Acquisition transaction expenses		37
Selling, general and administrative expenses	30,806	22,624
Total operating expenses	50,311	38,357
Operating income	34,849	29,885
Interest expense	(1,122)	(677)
Foreign currency loss	(1,329)	(1,835)
Other income	236	365
Earnings before income tax	32,634	27,738
Income tax expense	7,232	15,845
Net income	$ 25,402	$ 11,893
Basic earnings per share	$ 0.69	$ 0.33
Diluted earnings per share	$ 0.69	$ 0.33
Weighted average number of shares – basic	36,619,825	36,356,973
Weighted average number of shares – diluted	36,739,282	36,550,863

Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 25,402	$ 11,893
Other comprehensive income, gross of tax:
Foreign currency translation adjustments gain	5,515	7,910
Unrealized gain on foreign currency derivative securities	2,960	1,293
Unrealized gain on commodity derivative securities	32	296
Other comprehensive income, gross of tax	8,507	9,499
Other comprehensive income, related tax effect:
Foreign currency translation adjustments gain	(3)	1,242
Unrealized gain on foreign currency derivative securities	(795)	(347)
Unrealized gain on commodity derivative securities	(11)	(109)
Other comprehensive income, related tax effect	(809)	786
Other comprehensive income, net of tax	7,698	10,285
Comprehensive income	$ 33,100	$ 22,178

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net income	$ 25,402	$ 11,893
Adjustments to reconcile net income to cash (used in) provided by operating activities:
Depreciation and amortization	10,192	8,164
Deferred income taxes	676	(5,173)
Stock compensation	2,303	1,818
Defined benefit plan (income) expense	(16)	45
Provision of doubtful accounts	(54)	574
Gain on revaluation of financial derivatives		(456)
Loss on sale of property and equipment	103	29
Changes in operating assets and liabilities:
Accounts receivable	(13,900)	(21,906)
Inventory	(2,407)	(1,223)
Prepaid expenses and other assets	(6,492)	(1,628)
Accounts payable	1,094	6,392
Accrued liabilities	(38,237)	7,819
Net cash (used in) provided by operating activities	(21,336)	6,348
Investing Activities:
Proceeds from the sale of property and equipment	10	18
Final payment for acquisition of CSZ, net of cash acquired	(2,000)
Purchases of property and equipment	(13,562)	(17,010)
Net cash used in investing activities	(15,552)	(16,992)
Financing Activities:
Borrowing of debt		75,000
Repayments of debt	(8,427)	(446)
Excess tax expense from equity awards		(385)
Cash paid for financing costs		(650)
Cash paid for the cancellation of restricted stock	(926)	(793)
Proceeds from the exercise of Common Stock options	881	204
Net cash (used in) provided by financing activities	(8,472)	72,930
Foreign currency effect	2,080	3,791
Net (decrease) increase in cash and cash equivalents	(43,280)	66,077
Cash and cash equivalents at beginning of period	177,187	144,479
Cash and cash equivalents at end of period	133,907	210,556
Supplemental disclosure of cash flow information:
Cash paid for taxes	51,618	9,342
Cash paid for interest	858	458
Supplemental disclosure of non-cash transactions:
Common Stock issued to Board of Directors and employees	$ 1,125	$ 984

Consolidated Condensed Statement of Changes In Shareholders' Equity - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Earnings
Beginning Balance at Dec. 31, 2016	$ 460,405	$ 262,251	$ 10,323	$ (69,091)	$ 256,922
Beginning Balance (in shares) at Dec. 31, 2016	36,534,464	36,534,000
Cumulative effect of accounting change due to adoption of ASU 2016-09	$ 1,496				1,496
Exercise of Common Stock options for cash	881	$ 1,206	(325)
Exercise of Common Stock options for cash (in shares)		87,000
Cancellation of restricted stock	(926)	$ (926)
Cancellation of restricted stock (in shares)		(27,000)
Stock option compensation	1,178		1,178
Common Stock issued to Board of Directors and employees	1,125	$ 1,125
Common Stock issued to Board of Directors and employees (in shares)		134,000
Currency translation, net	5,512			5,512
Foreign currency hedge, net	2,165			2,165
Commodity hedge, net	21			21
Net income	25,402				25,402
Ending Balance at Mar. 31, 2017	$ 497,259	$ 263,656	$ 11,176	$ (61,393)	$ 283,820
Ending Balance (in shares) at Mar. 31, 2017	36,727,501	36,728,000

The Company and Subsequent Events	3 Months Ended
The Company and Subsequent Events	Mar. 31, 2017
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 “Company”, “we”, “us” and “our” used herein refer to Gentherm Incorporated and its consolidated subsidiaries. Our products provide solutions for automotive passenger comfort and convenience, battery thermal management, remote power generation, patient temperature management, environmental product testing and other consumer and industrial temperature control needs. 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 in order 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. North American Reorganization On January 4, 2016 and January 5, 2016, the Company completed reorganization transactions (the “Reorganization”) related to our North American business (the “Windsor Operations”). As part of our original integration plan to eliminate redundancies associated with the 2011 acquisition of Gentherm GmbH (formerly named W.E.T. Automotive Systems AG), the Windsor Operations have been consolidated into our existing European and North American facilities. As a result of the Reorganization, some of the business activities previously performed by the Windsor Operations are now being performed by other subsidiaries. Related to the Reorganization, the Company declared intercompany dividends, incurred and paid withholding taxes to the Canadian Revenue Agency of $7,600,000 during 2016. Additionally, the Company incurred income tax expense of $2,500,000 related to the intercompany dividends. These amounts incurred are expected to cover all future intercompany dividends needed to distribute the remaining earnings of the subsidiary to its parent in conjunction with the potential future liquidation of the subsidiary. In addition to the $7,600,000 of withholding tax and $2,500,000 of income taxes, the Reorganization required the Company to make a one-time income tax payment of approximately $32,600,000. The one-time income tax payment was accrued during the first quarter of 2016; however, the Company also recorded an offsetting deferred charge for approximately the same amount because the one-time income tax payment will result in tax deductions against income taxes in future periods. Therefore, the income tax payment did not have a material impact on the Company’s earnings during the first quarter of 2016 nor any subsequent quarter of 2016. The withholding tax payment was paid entirely in 2016. The income tax payments of $2,500,000 and $32,600,000 were made during the three months ended March 31, 2017. Subsequent Events We have evaluated subsequent events through the date that our consolidated condensed financial statements are issued. No events have taken place that meet the definition of a subsequent event requiring adjustments to or disclosures in this filing.

Basis of Presentation and New Accounting Pronouncements

3 Months Ended

Mar. 31, 2017

Basis Of Presentation And New Accounting Pronouncements [Abstract]

Basis of Presentation and New Accounting Pronouncements

Note 2 – Basis of Presentation and New Accounting Pronouncements

The accompanying unaudited consolidated condensed financial statements 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, 2016 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. Operating results for the three months ended March 31, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017. These consolidated condensed financial statements should be read in conjunction with the financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2016.

Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued

Goodwill Impairment

In January 2017, the FASB issued ASU 2017-04, “Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” ASU 2017-04 modified the concept of impairment of goodwill to be a condition that exists when the carrying value of a reporting unit that includes goodwill exceeds its fair value. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, limited to the total amount of goodwill allocated to that reporting unit. Entities no longer will determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if the reporting unit had been acquired in a business combination.

ASU 2017-04 is effective for annual and any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. The amendments in ASU 2017-04 must be applied on a prospective basis and in the initial period of adoption, entities must disclose the nature of and reason for the change in accounting principle. The Company expects adoption of ASU 2017-04 will reduce the complexity of evaluating goodwill for impairment.

Disclosure Impact of Recently Issued Accounting Standards

In January 2017, the FASB issued ASU 2017-03, “Accounting Changes and Error Corrections (Topic 250) and Investments – Equity Method and Joint Ventures (Topic 323): Amendments to SEC Paragraphs Pursuant to Staff Announcement at the September 22, 2016 and November 17, 2016 EITF Meetings.” ASU 2017-03 requires the SEC Staff Announcements incorporated into Staff Accounting Bulletin (“SAB”) Topic 11.M, “Disclosure Of The Impact That Recently Issued Accounting Standards Will Have On The Financial Statements Of The Registrant When Adopted In A Future Period” be applied to a registrant’s evaluation of ASU 2014-09, “Revenues from Contracts with Customers (Topic 606)”, ASU 2016-02, “Leases (Topic 842)”, and ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” The SEC Staff Announcement expands the disclosure requirements for the adoption of these ASUs if a registrant does not know or cannot reasonably estimate their expected impact on the financial statements. Registrants must now consider making additional qualitative financial statement disclosures, such as a comparison to the current accounting policies, to assist readers in assessing the significance of the impact on the standards will have on the financial statements when adopted. Also, a registrant must describe the status of its process to implement the new standards and the significant implementation matters yet to be addressed.

ASU 2017-03 is effective for fiscal year and interim period beginning after December 15, 2016. The Company has adopted ASU 2017-03 and applied it to the disclosures discussing ASU 2014-09 and 2016-02.

Business Combinations

In January, 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business” to assist entities with evaluating whether transactions should be accounted for as acquisition or disposals of assets or businesses. To be considered a business, the integrated set of activities and assets to be evaluated must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create an output. If substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the integrated set or activities and assets is not considered a business. ASU 2017-01 provides a framework to assist entities in evaluating whether an integrated set of activities and assets include both an input and a substantive process when the assets’ fair value is not concentrated in a single identifiable asset or group of similar identifiable assets.

ASU 2017-01 is effective for fiscal years and interim periods beginning after December 15, 2017. The amendments in ASU 2017-01 should be applied on or after the effective date. No disclosure is required at adoption. The Company expects the impact from adopting this update to be immaterial to the consolidated financial statements.

Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued

Income Taxes

In October, 2016, the FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” ASU 2016-16 modifies the current prohibition to recognize deferred income taxes from differences between the tax basis of assets in the buyer’s tax jurisdiction and their cost resulting from an intra-entity transfer from one tax-paying component to another tax-paying component of the same consolidated group. Under current GAAP, deferred income taxes for intra-entity asset transfers are not recognized until the asset is sold to an outside party. ASU 2016-16 allows entities to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs.

ASU 2016-16 is effective for fiscal years and interim periods beginning after December 15, 2017. For entities that issue interim financial statements and whose current fiscal year end date is December 31, 2016, early adoption can be made during the three month period ending March 31, 2017. The amendments in ASU 2016-16 must be applied on a modified retrospective basis through a cumulate-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We did not early adopt ASU 2016-16 during the three month period ending March 31, 2017. We are currently evaluating the amendments in this update to determine the effect it will have on the Company's consolidated financial statements.

Leases

In February, 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” ASU 2016-02 requires lessees to recognize on their balance sheet a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. Payments to be made in optional periods should be included in the measurement of lease assets and liabilities if the lessee is reasonably certain it will exercise an option to extend the lease or not exercise an option to terminate the lease. While ASU 2016-02 continues to differentiate between finance or capital leases and operating leases, the principal change from current lease accounting guidance is that lease assets and liabilities arising from operating leases will be recognized on the balance sheet.

ASU 2016-02 is effective for fiscal years and interim periods beginning after December 15, 2018. Early adoption of the amendments in this update are permitted. Lessees are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach which includes a number of practical expedients, including the ability to use hindsight in evaluating lessee options to extend or terminate a lease. An entity that elects to apply the practical expedients will be required to recognize a right-of-use asset and lease liability for all operating leases at each reporting date based on the present value of the remaining minimum rental payment that were tracked and disclosed under previous GAAP. We are currently in the process of determining the impact the implementation of ASU 2016-02 will have on the Company’s financial statements.

Stock Compensation

In March, 2016, the FASB issued ASU 2016-09, “Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting.” ASU 2016-09 involves several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statements of cash flows. Under this update, income tax benefits and deficiencies are to be recognized as income tax expense or benefit in the income statements and the tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity should recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. ASU 2016-09 requires excess tax benefits to be classified along with other income tax cash flows as an operating activity and clarifies that cash paid by an employer when directly withholding shares for tax-withholding purposes should be classified as a financing activity.

ASU 2016-09 is effective for fiscal years and interim periods beginning after December 15, 2016. The Company has adopted ASU 2016-09 for the period ended March 31, 2017. The Company recognized a $1,496 adjustment to the beginning balance of retained earnings for previously unrecognized excess tax benefits on share-based payment awards. Amendments related to the presentation of employee taxes paid on the statements of cash flows when an employer withholds shares to meet the minimum statutory withholding requirement were applied retrospectively to all periods presented. Amendments requiring recognition of excess tax benefits in the income statements and the classification of those excess tax benefits on the statements of cash flows were applied prospectively, beginning with the three month period ended March 31, 2017. Excess tax benefits on share-based payment awards in the statements of cash flows in prior periods have not been adjusted.

Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued

Statement of Cash Flows

In August, 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” ASU 2016-15 provides guidance on the classification of eight specific cash receipt and cash payment transactions in the statement of cash flows. The Company is currently evaluating the following transactions to determine the effect ASU 2016-15 will have on the Company’s consolidated statements of cash flows:

Debt extinguishment payments and debt prepayments are to be shown as cash outflows for financing activities. Presently, Gentherm classifies debt extinguishment payments within operating activities.

Payments made to settle contingent consideration liabilities not made soon after the acquisition date of a business combination should be recognized as cash outflows for financing activities up to the amount of the liability recognized at the acquisition date. Payments, or the portion of a payment, to settle contingent consideration liabilities that exceed the amount of the liability recognized at the acquisition date will be recognized as cash outflows for operating activities.

Cash receipts from the settlement of insurance claims, excluding those related to corporate-owned life insurance policies, shall be classified on the basis of the related insurance coverage. For example, proceeds received to cover claims issued under product recall liability insurance would be classified as cash inflows from operating activities.

Cash receipts from the settlement of corporate-owned life insurance policies shall be classified as cash inflows from investing activities.

The other cash receipt and cash payment transactions addressed by this update are not expected to impact the Company. For public companies, ASU 2016-15 is effective for fiscal years and interim periods beginning after December 15, 2017 and must be applied retrospectively to all periods presented. Early adoption of the amendments in this update are permitted.

Revenue from Contracts with Customers

In May, 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers.” ASU 2014-09 was developed to enable financial statement users to better understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. This update’s core principal is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Companies are to use a five-step contract review model to ensure revenue is recognized, measured and disclosed in accordance with this principle. The FASB has issued several amendments to the new standard, including a one-year deferral of the original effective date, and new methods for identifying performance obligations intended to reduce the cost and complexity or compliance.

This update permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (the cumulative catch-up transition method). We currently anticipate adopting this update retrospectively with the cumulative effect of initial application recognized at the date of initial application. ASU 2014-09 will be effective for fiscal years and interim periods beginning after December 15, 2017. Early application is not permitted.

Gentherm is executing a plan to complete the five-step contract review process for all existing contracts with customers, across all business units. While we continue to assess all potential impacts from this update, we currently believe the most significant impact relates to our accounting for options that give customers the right to purchase additional goods under long-term supply agreements, in the future. Due to the complexity of certain of our automotive supply contracts, the actual revenue recognition treatment for customer purchase options will depend on contract-specific terms and could vary from other contracts that are similar in nature. We are currently in the process of determining the total impact implementation of ASU 2014-09 and any corresponding amendments will have on the Company’s financial statements.

Earnings per Share

3 Months Ended

Mar. 31, 2017

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,
	2017		2016
Weighted average number of shares for calculation of basic EPS		36,619,825		36,356,973
Stock options under equity incentive plans		119,457		193,890
Weighted average number of shares for calculation of diluted EPS		36,739,282		36,550,863

The accompanying 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,
	2017		2016
Stock options outstanding for equity incentive plans		1,859,618		1,062,534

Segment Reporting

3 Months Ended

Mar. 31, 2017

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 seat comfort systems, specialized automotive cable systems and certain automotive and non-automotive thermal convenience products.

•

Industrial – the combined operating results of Gentherm Global Power Technologies (“GPT”), Cincinnati Sub-Zero Products, LLC (“CSZ”) and Gentherm’s advanced research and development division. Advanced research and development includes efforts focused on improving the efficiency of thermoelectric technologies and advanced heating wire technology as well as other applications. The segment includes government sponsored research projects.

●

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

The tables below present segment information about the reported product revenues, depreciation and amortization and operating income (loss) of the Company for three month periods ended March 31, 2017 and 2016. 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, 2017, goodwill assigned to our Automotive and Industrial segments were $21,258 and $30,773, respectively. As of March 31, 2016, goodwill assigned to our Automotive and Industrial segments were $22,675 and $6,151, respectively.

Note 4 – Segment Reporting – Continued

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

2017:
Product revenues	$	221,833	$	27,434		$	—		$	249,267
Depreciation and amortization		8,131		1,418			643			10,192
Operating income (loss)		50,757		(2,486	)		(13,422	)		34,849
2016:
Product revenues	$	210,435	$	5,279		$	—		$	215,714
Depreciation and amortization		7,283		390			491			8,164
Operating income (loss)		42,701		(2,616)			(10,200	)		29,885

Total product revenues information by geographic area is as follows:

	Three Months Ended March 31,
	2017				2016
United States	$	119,523	48	%	$	101,740	47	%
China		20,465	8	%		17,422	8	%
Germany		17,868	7	%		18,167	8	%
South Korea		16,391	7	%		19,096	9	%
Japan		14,283	6	%		12,234	6	%
Canada		10,929	4	%		8,982	4	%
Czech Republic		10,707	4	%		9,671	5	%
United Kingdom		9,668	4	%		6,667	3	%
Mexico		5,370	2	%		5,581	3	%
Other		24,063	10	%		16,154	7	%
Total Non U.S.		129,744	52	%		113,974	53	%
	$	249,267	100	%	$	215,714	100	%

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8971-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8595-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8933-108599

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+ Details

Debt

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Debt

Note 5 – Debt

Amended Credit Agreement

The Company, together with certain direct and indirect subsidiaries, have an outstanding Credit Agreement (the “Credit Agreement”) with a consortium of lenders and Bank of America, N.A., as administrative agent. The Credit Agreement was most recently amended on December 15, 2016 (the “Amended Credit Agreement”). As a result of such amendment, the aggregate principal available for borrowing under the secured revolving credit facility increased from $250,000 to $350,000.

All subsidiary borrowers and guarantors participating in the Amended 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 Amended Credit Agreement, including the stock and membership interests of specified subsidiaries (limited to 66% of the stock in the case of certain non-US subsidiaries). The Amended Credit Agreement restricts the amount of dividend payments the Company can make to shareholders. As of March 31, 2017, Gentherm had approximately $203,000 available to borrow under the U.S. Revolving Note, net of outstanding letters of credit totaling $1,020 as of March 31, 2017.

The Amended Credit Agreement requires the Company to maintain a minimum Consolidated Interest Coverage Ratio. The Company must also maintain a Consolidated Leverage Ratio. Definitions for these financial ratios are included in the Amended Credit Agreement.

Note 5 – Debt – Continued

Under the Amended 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 Base Rate is equal to the highest of the Federal Funds Rate (0.82% at March 31, 2017) plus 0.50%, Bank of America’s prime rate (4.00% at March 31, 2017), or a one month Eurocurrency rate (0.00% at March 31, 2017) plus 1.00%. The Eurocurrency Rate for loans denominated in U.S. Dollars is equal to the London Interbank Offered Rate (0.98% at March 31, 2017). 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 Amended 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:

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 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 beginning November, 2017 and ending May, 2023. Under the terms of the DEG Vietnam Loan, the Company must maintain a minimum Current Ratio, 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.

The following table summarizes the Company’s debt at March 31, 2017 and at December 31, 2016.

	March 31, 2017						December 31, 2016
	Interest Rate			Principal Balance			Principal Balance
Credit Agreement:
Revolving Note (U.S. Dollar Denominations)		2.48	%	$	146,000		$	154,000
DEG China Loan		4.25	%		2,137			2,525
DEG Vietnam Loan		5.21	%		15,000			15,000
Total debt					163,137			171,525
Current portion					(2,105	)		(2,092	)
Long-term debt, less current maturities				$	161,032		$	169,433

Note 5 – Debt – Continued

The scheduled principal maturities of our debt as of March 31, 2017 are as follows:

Year	Revolving Note (U.S. Dollar)		DEG China Note		DEG Vietnam Note		Total
Remainder of 2017	$	—	$	427	$	1,250	$	1,677
2018		—		855		2,500		3,355
2019		—		855		2,500		3,355
2020		—		—		2,500		2,500
2021		146,000		—		2,500		148,500
2022		—		—		2,500		2,500
Thereafter		—		—		1,250		1,250
Total	$	146,000	$	2,137	$	15,000	$	163,137

Principal outstanding under the Revolving Note will be due and payable in full on March 17, 2021. As of March 31, 2017, we were in compliance, in all material respects, with all terms as outlined in the Amended Credit Agreement, DEG China Loan and DEG Vietnam Loan.

Derivative Financial Instruments

3 Months Ended

Mar. 31, 2017

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 Amended Credit Agreement. Foreign currency exchange risks are attributable to sales to foreign customers and purchases from foreign suppliers not denominated in the 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 $12,913 and $29,538 outstanding as of March 31, 2017 and December 31, 2016, respectively.

The maximum length of time over which we hedge our exposure to price fluctuations in material commodities is one year. We had copper commodity swap contracts with a notional value of $4,043 and $407 outstanding at March 31, 2017 and December 31, 2016, respectively.

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 income (loss) in the consolidated condensed balance sheet. When the underlying hedge transaction is realized, the gain or loss included in accumulated other comprehensive income (loss) is recorded in earnings in the consolidated condensed statements 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 condensed statements of income. 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.

Note 6 – Derivative Financial Instruments – Continued

Information related to the recurring fair value measurement of derivative instruments in our consolidated condensed balance sheet as of March 31, 2017 is as follows:

Asset Derivatives

Net Asset/
(Liabilities)

Hedge
Designation

Fair Value
Hierarchy

Balance Sheet
Location

Fair
Value

Foreign currency derivatives

Cash flow hedge

Level 2

Current assets

1,544

Commodity derivatives

Cash flow hedge

Level 2

Current assets

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

	Location	Three Months Ended March 31, 2017			Three Months Ended March 31, 2016
Foreign currency derivatives	Cost of sales	$	(472	)	$	35
	Selling, general and administrative		(216	)		139
	Other comprehensive income		2,960			1,293
	Foreign currency (loss) gain		(57	)		78
Total foreign currency derivatives		$	2,215		$	1,545
Commodity derivatives	Cost of sales	$	19		$	(211	)
	Other comprehensive income		32			296
Total commodity derivatives		$	51		$	85

We did not incur any hedge ineffectiveness during the three months ended March 31, 2017 and 2016.

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Fair Value Measurement	3 Months Ended
Fair Value Measurement	Mar. 31, 2017
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. Note 7 – Fair Value Measurement – Continued Except for derivative instruments (see Note 6), pension liabilities, pension plan assets and a corporate owned life insurance policy, the Company has no material financial assets and liabilities that are carried at fair value at March 31, 2017 and December 31, 2016. The carrying amounts of financial instruments comprising cash and cash equivalents, 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). The carrying values of the Company’s Amended Credit Agreement indebtedness for the periods ending March 31, 2017 and December 31, 2016, respectively, 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 5). Discount rates used to measure the fair value of Gentherm’s DEG Vietnam Loan and DEG China Loan are based on quoted swap rates. As of March 31, 2017, the carrying values of the DEG Vietnam Loan and DEG China Loan were $15,000 and $2,137, respectively, as compared to an estimated fair value of $15,100 and $2,200 respectively. As of December 31, 2016, the carrying value of the DEG Vietnam Loan and DEG China Loan were $15,000 and $2,525, respectively, as compared to an estimated fair value of $14,900 and $2,600, 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. As of March 31, 2017 and December 31, 2016, the Company did not realize any changes to the fair value of these assets due to the non-occurrence of events or circumstances that could negatively impact their recoverability.

Reclassifications Out of Accumulated Other Comprehensive Income (Loss)

3 Months Ended

Mar. 31, 2017

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 months ended March 31, 2017 and March 31, 2016 are as follows:

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Commodity Hedge Derivatives				Foreign Currency Hedge Derivatives			Total
Balance at December 31, 2016	$	(2,550	)	$	(65,762	)	$	241			$	(1,020	)	$	(69,091	)
Other comprehensive income before reclassifications		—			5,515			50				1,873			7,438
Income tax effect of other comprehensive income before reclassifications		—			(3	)		(18	)			(503	)		(524	)
Amounts reclassified from accumulated other comprehensive income (loss) into net income		—			—			(18	)	^a		1,087	^a		1,069
Income taxes reclassified into net income		—			—			7				(292	)		(285	)
Net current period other comprehensive income		—			5,512			21				2,165			7,698
Balance at March 31, 2017	$	(2,550	)	$	(60,250	)	$	262			$	1,145		$	(61,393	)

(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)

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Commodity Hedge Derivatives			Foreign Currency Hedge Derivatives		Total
Balance at December 31, 2015	$	(2,060	)	$	(49,381	)	$	(229	)	$	—	$	(51,670	)
Other comprehensive income before reclassifications		—			7,910			114			1,293		9,317
Income tax effect of other comprehensive income before reclassifications		—			1,242			(42	)		(347)		853
Amounts reclassified from accumulated other comprehensive income (loss) into net income		—			—			182	^a		—		182
Income taxes reclassified into net income		—			—			(67	)		—		(67	)
Net current period other comprehensive income		—			9,152			187			946		10,285
Balance at March 31, 2016	$	(2,060	)	$	(40,229	)	$	(42	)	$	946	$	(41,385	)

(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 and commodity derivatives reported in accumulated other comprehensive income as of March 31, 2017 to be reclassified into earnings during the twelve month period ending December 31, 2017.

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=6522872

+ Details

Basis of Presentation and New Accounting Pronouncements (Policies)

3 Months Ended

Mar. 31, 2017

Basis Of Presentation And New Accounting Pronouncements [Abstract]

Goodwill Impairment

Disclosure Impact of Recently Issued Accounting Standards

Business Combinations

Income Taxes

Leases

Stock Compensation

Statement of Cash Flows

Debt extinguishment payments and debt prepayments are to be shown as cash outflows for financing activities. Presently, Gentherm classifies debt extinguishment payments within operating activities.

Cash receipts from the settlement of corporate-owned life insurance policies shall be classified as cash inflows from investing activities.

Revenue from Contracts with Customers

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References + Details

- Definition

Disclosure of accounting policy for leasing arrangements (both lessor and lessee). This disclosure may address (1) lease classification (that is, operating versus capital), (2) how the term of a lease is determined (for example, the circumstances in which a renewal option is considered part of the lease term), (3) how rental revenue or expense is recognized for a lease that contains rent escalations, (4) an entity's accounting treatment for deferred rent, including that which arises from lease incentives, rent abatements, rent holidays, or tenant allowances (5) an entity's accounting treatment for contingent rental payments and (6) an entity's policy for reviewing, at least annually, the residual values of sales-type and direct-finance leases. The disclosure also may indicate how the entity accounts for its capital leases, leveraged leases or sale-leaseback transactions.

+ References + Details

Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2017

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,
	2017		2016
Weighted average number of shares for calculation of basic EPS		36,619,825		36,356,973
Stock options under equity incentive plans		119,457		193,890
Weighted average number of shares for calculation of diluted EPS		36,739,282		36,550,863

Common Stock Issuable upon Exercise of Certain Stock Options

	Three Months Ended March 31,
	2017		2016
Stock options outstanding for equity incentive plans		1,859,618		1,062,534

Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2017

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			Reconciling Items			Consolidated Total

2017:
Product revenues	$	221,833	$	27,434		$	—		$	249,267
Depreciation and amortization		8,131		1,418			643			10,192
Operating income (loss)		50,757		(2,486	)		(13,422	)		34,849
2016:
Product revenues	$	210,435	$	5,279		$	—		$	215,714
Depreciation and amortization		7,283		390			491			8,164
Operating income (loss)		42,701		(2,616)			(10,200	)		29,885

Product Revenues Information by Geographic Area

Total product revenues information by geographic area is as follows:

	Three Months Ended March 31,
	2017				2016
United States	$	119,523	48	%	$	101,740	47	%
China		20,465	8	%		17,422	8	%
Germany		17,868	7	%		18,167	8	%
South Korea		16,391	7	%		19,096	9	%
Japan		14,283	6	%		12,234	6	%
Canada		10,929	4	%		8,982	4	%
Czech Republic		10,707	4	%		9,671	5	%
United Kingdom		9,668	4	%		6,667	3	%
Mexico		5,370	2	%		5,581	3	%
Other		24,063	10	%		16,154	7	%
Total Non U.S.		129,744	52	%		113,974	53	%
	$	249,267	100	%	$	215,714	100	%

Debt (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Summary of Company's Debt

The following table summarizes the Company’s debt at March 31, 2017 and at December 31, 2016.

	March 31, 2017						December 31, 2016
	Interest Rate			Principal Balance			Principal Balance
Credit Agreement:
Revolving Note (U.S. Dollar Denominations)		2.48	%	$	146,000		$	154,000
DEG China Loan		4.25	%		2,137			2,525
DEG Vietnam Loan		5.21	%		15,000			15,000
Total debt					163,137			171,525
Current portion					(2,105	)		(2,092	)
Long-term debt, less current maturities				$	161,032		$	169,433

Principal Maturities of Debt

The scheduled principal maturities of our debt as of March 31, 2017 are as follows:

Year	Revolving Note (U.S. Dollar)		DEG China Note		DEG Vietnam Note		Total
Remainder of 2017	$	—	$	427	$	1,250	$	1,677
2018		—		855		2,500		3,355
2019		—		855		2,500		3,355
2020		—		—		2,500		2,500
2021		146,000		—		2,500		148,500
2022		—		—		2,500		2,500
Thereafter		—		—		1,250		1,250
Total	$	146,000	$	2,137	$	15,000	$	163,137

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017 is as follows:

Asset Derivatives

Net Asset/
(Liabilities)

Hedge
Designation

Fair Value
Hierarchy

Balance Sheet
Location

Fair
Value

Foreign currency derivatives

Cash flow hedge

Level 2

Current assets

1,544

Commodity derivatives

Cash flow hedge

Level 2

Current assets

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

	Location	Three Months Ended March 31, 2017			Three Months Ended March 31, 2016
Foreign currency derivatives	Cost of sales	$	(472	)	$	35
	Selling, general and administrative		(216	)		139
	Other comprehensive income		2,960			1,293
	Foreign currency (loss) gain		(57	)		78
Total foreign currency derivatives		$	2,215		$	1,545
Commodity derivatives	Cost of sales	$	19		$	(211	)
	Other comprehensive income		32			296
Total commodity derivatives		$	51		$	85

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

3 Months Ended

Mar. 31, 2017

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 months ended March 31, 2017 and March 31, 2016 are as follows:

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Commodity Hedge Derivatives				Foreign Currency Hedge Derivatives			Total
Balance at December 31, 2016	$	(2,550	)	$	(65,762	)	$	241			$	(1,020	)	$	(69,091	)
Other comprehensive income before reclassifications		—			5,515			50				1,873			7,438
Income tax effect of other comprehensive income before reclassifications		—			(3	)		(18	)			(503	)		(524	)
Amounts reclassified from accumulated other comprehensive income (loss) into net income		—			—			(18	)	^a		1,087	^a		1,069
Income taxes reclassified into net income		—			—			7				(292	)		(285	)
Net current period other comprehensive income		—			5,512			21				2,165			7,698
Balance at March 31, 2017	$	(2,550	)	$	(60,250	)	$	262			$	1,145		$	(61,393	)

(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)

	Defined Benefit Pension Plans			Foreign Currency Translation Adjustments			Commodity Hedge Derivatives			Foreign Currency Hedge Derivatives		Total
Balance at December 31, 2015	$	(2,060	)	$	(49,381	)	$	(229	)	$	—	$	(51,670	)
Other comprehensive income before reclassifications		—			7,910			114			1,293		9,317
Income tax effect of other comprehensive income before reclassifications		—			1,242			(42	)		(347)		853
Amounts reclassified from accumulated other comprehensive income (loss) into net income		—			—			182	^a		—		182
Income taxes reclassified into net income		—			—			(67	)		—		(67	)
Net current period other comprehensive income		—			9,152			187			946		10,285
Balance at March 31, 2016	$	(2,060	)	$	(40,229	)	$	(42	)	$	946	$	(41,385	)

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

The Company and Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Company And Subsequent Events [Abstract]
Amount paid withholding taxes in Canadian Revenue Agency		$ 7,600,000
Income tax expense related to intercompany dividends	$ 2,500,000
Accrued one-time income tax payment	$ 32,600,000

Basis of Presentation and New Accounting Pronouncements - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
ASU 2016-09
Basis Of Presentation And New Accounting Pronouncements [Line Items]
Adjustment to retained earnings for previously unrecognized excess tax benefits on share-based payment awards	$ 1,496

Earnings per Share (Detail) - shares	3 Months Ended
Earnings per Share (Detail) - shares	Mar. 31, 2017	Mar. 31, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average number of shares for calculation of basic EPS	36,619,825	36,356,973
Stock options under equity incentive plans	119,457	193,890
Weighted average number of shares for calculation of diluted EPS	36,739,282	36,550,863
Stock options outstanding for 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	1,859,618	1,062,534

Segment Reporting - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Segment Reporting Information [Line Items]
Goodwill	$ 52,031	$ 51,735
Automotive Segments
Segment Reporting Information [Line Items]
Goodwill	21,258		$ 22,675
Industrial Segments
Segment Reporting Information [Line Items]
Goodwill	$ 30,773		$ 6,151

Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Product revenues	$ 249,267	$ 215,714
Depreciation and amortization	10,192	8,164
Operating income (loss)	34,849	29,885
Operating Segments \| Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	221,833	210,435
Depreciation and amortization	8,131	7,283
Operating income (loss)	50,757	42,701
Operating Segments \| Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	27,434	5,279
Depreciation and amortization	1,418	390
Operating income (loss)	(2,486)	(2,616)
Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	643	491
Operating income (loss)	$ (13,422)	$ (10,200)

Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended
Segment Reporting (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Product revenues	$ 249,267	$ 215,714
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	$ 119,523	$ 101,740
United States \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	48.00%	47.00%
South Korea
Segment Reporting Information [Line Items]
Product revenues	$ 16,391	$ 19,096
South Korea \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	7.00%	9.00%
China
Segment Reporting Information [Line Items]
Product revenues	$ 20,465	$ 17,422
China \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	8.00%	8.00%
Germany
Segment Reporting Information [Line Items]
Product revenues	$ 17,868	$ 18,167
Germany \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	7.00%	8.00%
Czech Republic
Segment Reporting Information [Line Items]
Product revenues	$ 10,707	$ 9,671
Czech Republic \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	4.00%	5.00%
Japan
Segment Reporting Information [Line Items]
Product revenues	$ 14,283	$ 12,234
Japan \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	6.00%	6.00%
Canada
Segment Reporting Information [Line Items]
Product revenues	$ 10,929	$ 8,982
Canada \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	4.00%	4.00%
United Kingdom
Segment Reporting Information [Line Items]
Product revenues	$ 9,668	$ 6,667
United Kingdom \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	4.00%	3.00%
Mexico
Segment Reporting Information [Line Items]
Product revenues	$ 5,370	$ 5,581
Mexico \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	2.00%	3.00%
Other
Segment Reporting Information [Line Items]
Product revenues	$ 24,063	$ 16,154
Other \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	10.00%	7.00%
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 129,744	$ 113,974
Non U.S. \| Sales Revenue, Net \| Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	52.00%	53.00%

Debt - Additional Information (Detail) - USD ($)	3 Months Ended
Debt - Additional Information (Detail) - USD ($)	Mar. 31, 2017	Dec. 15, 2016	Dec. 14, 2016
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	0.82%
London Interbank Offered Rate
Debt Instrument [Line Items]
Interest rate	0.98%
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Aggregate principal amount available for borrowing	$ 203,000,000
Letter of credit net of outstanding amount	$ 1,020,000
Debt maturity date	Mar. 17, 2021
United State Bank Of America Credit Facility
Debt Instrument [Line Items]
Interest rate	4.00%
Euro Currency Rate Loans \| Minimum
Debt Instrument [Line Items]
Interest rate	0.00%
Euro Currency Rate Loans \| Minimum \| Amended 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 \| Amended Credit Agreement
Debt Instrument [Line Items]
Interest rate	2.00%
Base Rate Loans \| Minimum \| Amended Credit Agreement
Debt Instrument [Line Items]
Interest rate	0.25%
Base Rate Loans \| Maximum \| Amended 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
Debt Instrument [Line Items]
Aggregate principal amount available for borrowing		$ 350,000,000	$ 250,000,000

Summary of Company's Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 163,137	$ 171,525
Current portion	(2,105)	(2,092)
Long-term debt, less current maturities	$ 161,032	169,433
Revolving Note (U.S. Dollar Denominations)
Debt Instrument [Line Items]
Interest Rate	2.48%
Total debt	$ 146,000	154,000
DEG China Loan
Debt Instrument [Line Items]
Interest Rate	4.25%
Total debt	$ 2,137	2,525
DEG Vietnam Loan
Debt Instrument [Line Items]
Interest Rate	5.21%
Total debt	$ 15,000	$ 15,000

Principal Maturities of Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt maturing in remainder of 2017	$ 1,677
Debt maturing in 2018	3,355
Debt maturing in 2019	3,355
Debt maturing in 2020	2,500
Debt maturing in 2021	148,500
Debt maturing in 2022	2,500
Thereafter	1,250
Total debt	163,137	$ 171,525
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Debt maturing in 2021	146,000
Total debt	146,000	154,000
DEG China Loan
Debt Instrument [Line Items]
Debt maturing in remainder of 2017	427
Debt maturing in 2018	855
Debt maturing in 2019	855
Total debt	2,137	2,525
DEG Vietnam Loan
Debt Instrument [Line Items]
Debt maturing in remainder of 2017	1,250
Debt maturing in 2018	2,500
Debt maturing in 2019	2,500
Debt maturing in 2020	2,500
Debt maturing in 2021	2,500
Debt maturing in 2022	2,500
Thereafter	1,250
Total debt	$ 15,000	$ 15,000

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
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	1 year
Foreign Currency Derivatives
Derivative [Line Items]
Notional Value	$ 12,913,000		$ 29,538,000
Commodity Derivatives
Derivative [Line Items]
Notional Value	4,043,000		$ 407,000
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 - Designated as Hedging Instrument - Current Assets $ in Thousands	Mar. 31, 2017 USD ($)
Foreign Currency Derivatives
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 1,544
Net Asset/ (Liabilities)	1,544
Commodity Derivatives
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	50
Net Asset/ (Liabilities)	$ 50

Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 2,215	$ 1,545
Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	51	85
Other comprehensive income \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	2,960	1,293
Other comprehensive income \| Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	32	296
Cost of sales \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(472)	35
Cost of sales \| Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	19	(211)
Selling, general and administrative expense \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(216)	139
Foreign currency (loss) gain \| Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ (57)	$ 78

Fair Value Measurement - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial assets, fair value	$ 0	$ 0
Financial liabilities, fair value	0	0
Carrying value	163,137,000	171,525,000
Changes to fair value of assets, realized	0	0
DEG Vietnam Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	15,000,000	15,000,000
Fair value	15,100,000	14,900,000
DEG China Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	2,137,000	2,525,000
Fair value	$ 2,200,000	$ 2,600,000

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

3 Months Ended

Mar. 31, 2017

Mar. 31, 2016

Accumulated Other Comprehensive Income Loss [Line Items]

Beginning Balance

$ (69,091)

$ (51,670)

Other comprehensive income before reclassifications

7,438

9,317

Income tax effect of other comprehensive income before reclassifications

(524)