Gentherm (THRM) 10-Q 30 Oct 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	THRM
Entity Registrant Name	GENTHERM INC
Entity Central Index Key	903,129
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		36,680,528

Consolidated Condensed Balance

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 147,626	$ 177,187
Accounts receivable, less allowance of $1,082 and $1,391, respectively	182,236	170,084
Inventory:
Raw materials	59,399	60,525
Work in process	19,382	13,261
Finished goods	34,604	31,288
Inventory, net	113,385	105,074
Derivative financial instruments	1,542	18
Prepaid expenses and other assets	37,034	32,000
Total current assets	481,823	484,363
Property and equipment, net	190,825	172,052
Goodwill	54,287	51,735
Other intangible assets, net	52,520	57,557
Deferred financing costs	1,008	1,221
Deferred income tax assets	44,564	35,299
Other non-current assets	37,561	40,803
Total assets	862,588	843,030
Current Liabilities:
Accounts payable	80,322	84,511
Accrued liabilities	65,519	105,625
Current maturities of long-term debt	3,445	2,092
Derivative financial instruments		1,395
Total current liabilities	149,286	193,623
Pension benefit obligation	8,170	7,419
Other liabilities	5,207	4,092
Long-term debt, less current maturities	142,446	169,433
Deferred income tax liabilities	6,674	8,058
Total liabilities	311,783	382,625
Common Stock:
No par value; 55,000,000 shares authorized, 36,677,528 and 36,534,464 issued and outstanding at September 30, 2017 and December 31, 2016, respectively	262,935	262,251
Paid-in capital	14,206	10,323
Accumulated other comprehensive loss	(25,223)	(69,091)
Accumulated earnings	298,887	256,922
Total shareholders’ equity	550,805	460,405
Total liabilities and shareholders’ equity	$ 862,588	$ 843,030

Consolidated Condensed Balance3

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,082	$ 1,391
Common Stock, par value
Common Stock, shares authorized	55,000,000	55,000,000
Common Stock, shares issued	36,677,528	36,534,464
Common Stock, shares outstanding	36,677,528	36,534,464

Consolidated Condensed Statemen

Consolidated Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Product revenues	$ 235,853	$ 232,625	$ 728,498	$ 681,059
Cost of sales	165,624	155,931	494,704	464,628
Gross margin	70,229	76,694	233,794	216,431
Operating expenses:
Net research and development expenses	19,721	19,745	60,633	54,552
Acquisition transaction expenses		22		693
Selling, general and administrative expenses	34,331	29,512	96,912	81,533
Total operating expenses	54,052	49,279	157,545	136,778
Operating income	16,177	27,415	76,249	79,653
Interest expense	(1,250)	(660)	(3,633)	(2,287)
Foreign currency (loss) gain	(7,340)	(873)	(21,920)	88
Other (expense) income	(403)	359	6	754
Earnings before income tax	7,184	26,241	50,702	78,208
Income tax expense	630	6,018	10,233	27,646
Net income	$ 6,554	$ 20,223	$ 40,469	$ 50,562
Basic earnings per share	$ 0.18	$ 0.55	$ 1.10	$ 1.39
Diluted earnings per share	$ 0.18	$ 0.55	$ 1.10	$ 1.38
Weighted average number of shares – basic	36,742,168	36,477,044	36,713,294	36,425,626
Weighted average number of shares – diluted	36,805,076	36,594,581	36,831,213	36,558,363

Consolidated Condensed Stateme5

Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,554	$ 20,223	$ 40,469	$ 50,562
Other comprehensive income (loss), gross of tax:
Foreign currency translation adjustments gain	13,251	2,230	42,051	2,866
Unrealized (loss) gain on foreign currency derivative securities	(1,234)	(868)	2,541	(624)
Unrealized gain on commodity derivative securities	136	139	184	544
Other comprehensive income, gross of tax	12,153	1,501	44,776	2,786
Other comprehensive income (loss), related tax effect:
Foreign currency translation adjustments gain	(49)	(13)	(158)	1,087
Unrealized (loss) gain on foreign currency derivative securities	331	233	(683)	168
Unrealized gain on commodity derivative securities	(50)	(51)	(67)	(201)
Other comprehensive income (loss), related tax effect	232	169	(908)	1,054
Other comprehensive income, net of tax	12,385	1,670	43,868	3,840
Comprehensive income	$ 18,939	$ 21,893	$ 84,337	$ 54,402

Consolidated Condensed Stateme6

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities:
Net income	$ 40,469	$ 50,562
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	32,663	27,724
Deferred income taxes	(9,059)	(1,933)
Stock compensation	8,559	6,856
Defined benefit plan expense	96	151
Provision of doubtful accounts	(353)	385
Loss on sale of property and equipment	868	291
Changes in operating assets and liabilities:
Accounts receivable	(5,581)	(22,835)
Inventory	(4,407)	(5,647)
Prepaid expenses and other assets	(555)	2,826
Accounts payable	(7,433)	6,508
Accrued liabilities	(39,896)	6,123
Net cash provided by operating activities	15,371	71,011
Investing Activities:
Proceeds from the sale of property and equipment	41	45
Acquisition of subsidiary, net of cash acquired	(2,000)	(73,593)
Purchases of property and equipment	(37,181)	(50,742)
Net cash used in investing activities	(39,140)	(124,290)
Financing Activities:
Borrowing of debt		75,000
Repayments of debt	(25,906)	(32,368)
Excess tax expense from equity awards		(277)
Cash paid for financing costs		(650)
Cash paid for the cancellation of restricted stock	(1,100)	(1,196)
Cash paid for the repurchase of common stock	(5,326)
Proceeds from the exercise of Common Stock options	2,434	1,038
Net cash (used in) provided by financing activities	(29,898)	41,547
Foreign currency effect	24,106	66
Net decrease in cash and cash equivalents	(29,561)	(11,666)
Cash and cash equivalents at beginning of period	177,187	144,479
Cash and cash equivalents at end of period	147,626	132,813
Supplemental disclosure of cash flow information:
Cash paid for taxes	67,160	18,183
Cash paid for interest	3,171	1,963
Supplemental disclosure of non-cash transactions:
Common Stock issued to Board of Directors and employees	$ 3,873	$ 3,507

Consolidated Condensed Stateme7

Consolidated Condensed Statement of Changes In Shareholders' Equity - 9 months ended Sep. 30, 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
Stock repurchase	(5,326)	$ (5,326)
Stock repurchase (in shares)		(164,000)
Exercise of Common Stock options for cash	2,434	$ 3,237	(803)
Exercise of Common Stock options for cash (in shares)		187,000
Cancellation of restricted stock	(1,100)	$ (1,100)
Cancellation of restricted stock (in shares)		(32,000)
Stock option compensation	4,686		4,686
Common Stock issued to Board of Directors and employees	3,873	$ 3,873
Common Stock issued to Board of Directors and employees (in shares)		153,000
Currency translation, net	41,893			41,893
Foreign currency hedge, net	1,858			1,858
Commodity hedge, net	117			117
Net income	40,469				40,469
Ending Balance at Sep. 30, 2017	$ 550,805	$ 262,935	$ 14,206	$ (25,223)	$ 298,887
Ending Balance (in shares) at Sep. 30, 2017	36,677,528	36,678,000

The Company and Subsequent Even

The Company and Subsequent Events	9 Months Ended
	Sep. 30, 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 operated from Windsor, Ontario, Canada (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 during 2016. Additionally, the Company incurred income tax expense of $2,500 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 of withholding tax and $2,500 of income taxes, the Reorganization required the Company to make a one-time income tax payment of approximately $32,600. 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. The withholding tax payment was paid entirely in 2016. The income tax payments of $2,500 and $32,600 were paid during the first quarter of 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 Form 10-Q.

Basis of Presentation and New A

Basis of Presentation and New Accounting Pronouncements	9 Months Ended
	Sep. 30, 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 and nine months ended September 30, 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 Balance Sheet Reclassification In June, 2017, the Company changed its classification of prepayments made during the construction of plant assets from prepaid expenses and other assets to other non-current assets on the consolidated condensed balance sheet. The Company reclassified $4,390 from prepaid expenses and other assets to other non-current assets on the December 31, 2016 consolidated condensed balance sheet in order to conform with the current year’s presentation. Derivatives and Hedging In August, 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” ASU 2017-12 expands the number and type of nonfinancial and interest rate risk components an entity has the ability to designate as the hedged risk in a qualifying hedging relationship. ASU 2017-12 requires entities to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedge item is reported. This approach simplifies the financial statement reporting for qualifying hedging relationships by eliminating the requirement to separately report the portion of the hedge deemed to be ineffective. For cash flow hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness is recorded in other comprehensive income and reclassified to earnings when the hedged item affects earnings. Furthermore, income statement effects from fair value and cash flow hedges are to be presented in tabular disclosure. ASU 2017-12 is effective for annual and any interim periods beginning after December 15, 2018. Early adoption of the amendments in this update are permitted. For cash flow hedges existing at the date of adoption, an entity should apply a cumulative catch-up adjustment related to eliminating the separate measurement of ineffectiveness to accumulative other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the amendments in this update. We are currently in the process of determining the impact the implementation of ASU 2017-12 will have on the Company’s financial statements. Share-Based Payment Awards In May, 2017, the FASB issued ASU 2017-09, “Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting.” ASU 2017-09 clarifies which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting, in accordance with Topic 718. An entity should account for the effect of a modification unless all of the following are met: 1. The fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified. If the modification does not affect any of the inputs of the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification. 2. The vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified. 3. The classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. ASU 2017-09 is effective for annual and any interim periods beginning after December 15, 2017. Early adoption of the amendments in this update is permitted. The amendments in ASU 2017-09 should 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 has not historically made changes to the terms or conditions of shared-based payment awards and does not expect adoption of ASU 2017-09 to have a material impact the consolidated financial statements when it is adopted in the first quarter of 2018. 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. Early adoption of the amendments in this update is permitted. 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. 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 acquisitions 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. 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 was permitted 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. The update will be adopted during the first quarter of 2018 and is expected to increase the Company’s 2018 effective tax rate by approximately 3% to 5%. 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. Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued 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. 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: 1) 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. 2) 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. 3) 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. 4) 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 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 principle 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 of 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 have chosen to use the cumulative catch-up transition method. ASU 2014-09 will be effective for fiscal years and interim periods beginning after December 15, 2017. Early application is not permitted. Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued 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 will be to our automotive business unit and 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. Based on our progress executing the five-step contract review process, we believe the implementation of ASU 2014-09 and any corresponding amendments will have an immaterial impact on the financial results of the Company.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings per Share	Note 3 – 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 Nine Months 2017 2016 2017 2016 Weighted average number of shares for calculation of basic EPS 36,742,168 36,477,044 36,713,294 36,425,626 Stock options under equity incentive plans 62,908 117,537 117,919 132,737 Weighted average number of shares for calculation of diluted EPS 36,805,076 36,594,581 36,831,213 36,558,363 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 Nine Months 2017 2016 2017 2016 Stock options outstanding for equity incentive plans 1,845,784 1,455,534 1,845,784 1,455,534

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 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 • 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 – 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 and nine month periods ended September 30, 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 September 30, 2017, goodwill assigned to our Automotive and Industrial segments were $23,514 and $30,773, respectively. As of September 30, 2016, goodwill assigned to our Automotive and Industrial segments were $22,362 and $30,573, respectively. Three Months Ended September 30, Automotive Industrial Reconciling Consolidated 2017: Product revenues $ 215,175 $ 20,678 $ — $ 235,853 Depreciation and amortization 9,423 1,334 715 11,472 Operating income (loss) 37,179 (5,607 ) (15,395 ) 16,177 2016: Product revenues $ 212,369 $ 20,256 $ — $ 232,625 Depreciation and amortization 8,631 989 557 10,177 Operating income (loss) 54,408 (4,899 ) (22,094 ) 27,415 Nine Months Ended September 30, Automotive Industrial Reconciling Consolidated 2017: Product revenues $ 652,820 $ 75,678 $ — $ 728,498 Depreciation and amortization 26,602 4,040 2,021 32,663 Operating income (loss) 128,018 (10,741 ) (41,028 ) 76,249 2016: Product revenues $ 634,636 $ 46,423 $ — $ 681,059 Depreciation and amortization 23,566 2,578 1,580 27,724 Operating income (loss) 133,271 (14,628) (38,990 ) 79,653 Total product revenues information by geographic area is as follows: Three Months Ended September 30, 2017 2016 United States $ 104,033 44 % $ 117,815 51 % China 25,741 11 % 21,573 9 % Germany 17,711 8 % 17,670 8 % South Korea 16,569 7 % 16,295 7 % Japan 15,727 7 % 10,532 4 % Canada 10,667 5 % 9,440 4 % Czech Republic 9,175 4 % 9,302 4 % United Kingdom 8,143 3 % 6,824 3 % Mexico 5,706 2 % 5,288 2 % Other 22,381 9 % 17,886 8 % Total Non U.S. 131,820 56 % 114,810 49 % $ 235,853 100 % $ 232,625 100 % Note 4 – Segment Reporting – Continued Nine Months Ended September 30, 2017 2016 United States $ 337,697 46 % $ 332,693 49 % China 66,168 9 % 57,983 9 % Germany 53,273 7 % 54,261 8 % South Korea 50,714 7 % 56,443 8 % Japan 43,103 6 % 32,545 5 % Canada 32,709 5 % 28,513 4 % Czech Republic 29,826 4 % 29,264 4 % United Kingdom 26,250 4 % 20,561 3 % Mexico 16,398 2 % 16,848 2 % Other 72,360 10 % 51,948 8 % Total Non U.S. 390,801 54 % 348,366 51 % $ 728,498 100 % $ 681,059 100 %

Debt

Debt	9 Months Ended
	Sep. 30, 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 amount 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 September 30, 2017, Gentherm had approximately $221 available to borrow under the U.S. Revolving Note, net of outstanding letters of credit totaling $330. The Amended Credit Agreement requires the Company to maintain a minimum Consolidated Interest Coverage Ratio and Consolidated Leverage Ratio, each defined therein. 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 rate for Base Rate Loans is equal to the highest of the Federal Funds Rate (1.06% at September 30, 2017) plus 0.50%, Bank of America’s prime rate (4.25% at September 30, 2017), or a one month Eurocurrency rate (0.00% at September 30, 2017) plus 1.00%. The rate for Eurocurrency Rate Loans denominated in U.S. Dollars is equal to the London Interbank Offered Rate (1.23% at September 30, 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: 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 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 September 30, 2017 and at December 31, 2016. September 30, 2017 December 31, Interest Principal Principal Credit Agreement: Revolving Note (U.S. Dollar Denominations) 2.99 % $ 129,000 $ 154,000 DEG China Loan 4.25 % 1,891 2,525 DEG Vietnam Loan 5.21 % 15,000 15,000 Total debt 145,891 171,525 Current portion (3,445 ) (2,092 ) Long-term debt, less current maturities $ 142,446 $ 169,433 The scheduled principal maturities of our debt as of September 30, 2017 are as follows: Year Revolving (U.S. Dollar) DEG DEG Total Remainder of 2017 $ — $ — $ 1,250 $ 1,250 2018 — 945 2,500 3,445 2019 — 946 2,500 3,446 2020 — — 2,500 2,500 2021 129,000 — 2,500 131,500 2022 — — 2,500 2,500 Thereafter — — 1,250 1,250 Total $ 129,000 $ 1,891 $ 15,000 $ 145,891 Principal outstanding under the Revolving Note will be due and payable in full on March 17, 2021. As of September 30, 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 Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 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 $28,856 and $29,538 outstanding as of September 30, 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 $1,617 and $407 outstanding at September 30, 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. Information related to the recurring fair value measurement of derivative instruments in our consolidated condensed balance sheet as of September 30, 2017 is as follows: Asset Derivatives Net Asset Hedge Designation Fair Value Hierarchy Balance Sheet Location Fair Value Foreign currency derivatives Cash flow hedge Level 2 Current assets $ 1,340 $ 1,340 Commodity derivatives Cash flow hedge Level 2 Current assets $ 202 $ 202 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 September 30, 2017 Three Months Ended September 30, 2016 Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Foreign currency derivatives Product revenues $ 54 $ — $ 54 $ — Cost of sales 1,424 (112 ) 1,303 23 Selling, general and administrative — — (216 ) 139 Other comprehensive income (1,234 ) (868 ) 2,541 (624 ) Foreign currency (loss) gain 15 (41 ) (62 ) 108 Total foreign currency derivatives $ 259 $ (1,021 ) $ 3,620 $ (354 ) Commodity derivatives Cost of sales $ (4 ) $ (157 ) $ 25 $ (510 ) Other comprehensive income 136 139 184 544 Total commodity derivatives $ 132 $ (18 ) $ 209 $ 34 We did not incur any hedge ineffectiveness during the three and nine months ended September 30, 2017 and 2016.

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 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. 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 September 30, 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 September 30, 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 September 30, 2017, the carrying values of the DEG Vietnam Loan and DEG China Loan were $15,000 and $1,891, respectively, as compared to an estimated fair value of $15,100 and $1,900, 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 September 30, 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 Accumu

Reclassifications Out of Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 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 September 30, 2017 and September 30, 2016 are as follows: Defined Benefit Pension Plans Foreign Currency Translation Adjustments Commodity Hedge Derivatives Foreign Currency Hedge Derivatives Total Balance at June 30, 2017 $ (2,550 ) $ (37,071 ) $ 272 $ 1,741 $ (37,608 ) Other comprehensive income before reclassifications — 13,251 153 106 13,510 Income tax effect of other comprehensive income before reclassifications — (49 ) (56 ) (29 ) (134 ) Amounts reclassified from accumulated other comprehensive income into net income — — (17 ) a (1,340 ) a (1,357 ) Income taxes reclassified into net income — — 6 360 366 Net current period other comprehensive income — 13,202 86 (903 ) 12,385 Balance at September 30, 2017 $ (2,550 ) $ (23,869 ) $ 358 $ 838 $ (25,223 ) (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 June 30, 2016 $ (2,060 ) $ (47,645 ) $ 26 $ 179 $ (49,500 ) Other comprehensive income (loss) before reclassifications — 2,230 (8 ) (818 ) 1,404 Income tax effect of other comprehensive income (loss) before reclassifications — (13 ) 3 220 210 Amounts reclassified from accumulated other comprehensive (income) loss into net income — — 147 a (50 ) a 97 Income taxes reclassified into net income — — (54 ) 13 (41 ) Net current period other comprehensive income — 2,217 88 (635 ) 1,670 Balance at September 30, 2016 $ (2,060 ) $ (45,428 ) $ 114 $ (456 ) $ (47,830 ) (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 Reclassification adjustments and other activities impacting accumulated other comprehensive income (loss) during the nine months ended September 30, 2017 and September 30, 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 — 42,051 231 3,071 45,353 Income tax effect of other comprehensive income before reclassifications — (158 ) (84 ) (825 ) (1,067 ) Amounts reclassified from accumulated other comprehensive income into net income — — (47 ) a (530 ) a (577 ) Income taxes reclassified into net income — — 17 142 159 Net current period other comprehensive income — 41,893 117 1,858 43,868 Balance at September 30, 2017 $ (2,550 ) $ (23,869 ) $ 358 $ 838 $ (25,223 ) (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, 2015 $ (2,060 ) $ (49,381 ) $ (229 ) $ — $ (51,670 ) Other comprehensive income (loss) before reclassifications — 2,866 94 (117 ) 2,843 Income tax effect of other comprehensive income (loss) before reclassifications — 1,087 (35 ) 32 1,084 Amounts reclassified from accumulated other comprehensive (income) loss into net income — — 450 a (507 ) a (57 ) Income taxes reclassified into net income — — (166 ) 136 (30 ) Net current period other comprehensive income — 3,953 343 (456 ) 3,840 Balance at September 30, 2016 $ (2,060 ) $ (45,428 ) $ 114 $ (456 ) $ (47,830 ) (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 as of September 30, 2017 to be reclassified into earnings during the next twelve months. We expect all of the existing gains and losses related to commodity derivatives reported in accumulated other comprehensive income as of September 30, 2017 to be reclassified into earning during the twelve month period ending December 31, 2017. See Note 6 for additional information about derivative financial instruments and the effects from reclassification to net income.

Basis of Presentation and New16

Basis of Presentation and New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2017
Basis Of Presentation And New Accounting Pronouncements [Abstract]
Balance Sheet Reclassification	Balance Sheet Reclassification In June, 2017, the Company changed its classification of prepayments made during the construction of plant assets from prepaid expenses and other assets to other non-current assets on the consolidated condensed balance sheet. The Company reclassified $4,390 from prepaid expenses and other assets to other non-current assets on the December 31, 2016 consolidated condensed balance sheet in order to conform with the current year’s presentation.
Derivatives and Hedging	Derivatives and Hedging In August, 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” ASU 2017-12 expands the number and type of nonfinancial and interest rate risk components an entity has the ability to designate as the hedged risk in a qualifying hedging relationship. ASU 2017-12 requires entities to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedge item is reported. This approach simplifies the financial statement reporting for qualifying hedging relationships by eliminating the requirement to separately report the portion of the hedge deemed to be ineffective. For cash flow hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness is recorded in other comprehensive income and reclassified to earnings when the hedged item affects earnings. Furthermore, income statement effects from fair value and cash flow hedges are to be presented in tabular disclosure. ASU 2017-12 is effective for annual and any interim periods beginning after December 15, 2018. Early adoption of the amendments in this update are permitted. For cash flow hedges existing at the date of adoption, an entity should apply a cumulative catch-up adjustment related to eliminating the separate measurement of ineffectiveness to accumulative other comprehensive income with a corresponding adjustment to the opening balance of retained earnings as of the beginning of the fiscal year that an entity adopts the amendments in this update. We are currently in the process of determining the impact the implementation of ASU 2017-12 will have on the Company’s financial statements.
Share-Based Payment Awards	Share-Based Payment Awards In May, 2017, the FASB issued ASU 2017-09, “Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting.” ASU 2017-09 clarifies which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting, in accordance with Topic 718. An entity should account for the effect of a modification unless all of the following are met: 1. The fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified. If the modification does not affect any of the inputs of the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification. 2. The vesting conditions of the modified award are the same as the vesting conditions of the original award immediately before the original award is modified. 3. The classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. ASU 2017-09 is effective for annual and any interim periods beginning after December 15, 2017. Early adoption of the amendments in this update is permitted. The amendments in ASU 2017-09 should 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 has not historically made changes to the terms or conditions of shared-based payment awards and does not expect adoption of ASU 2017-09 to have a material impact the consolidated financial statements when it is adopted in the first quarter of 2018.
Goodwill Impairment	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. Early adoption of the amendments in this update is permitted. 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.
Business Combinations	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 acquisitions 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.
Income Taxes	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 was permitted 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. The update will be adopted during the first quarter of 2018 and is expected to increase the Company’s 2018 effective tax rate by approximately 3% to 5%.
Leases	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. Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued 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.
Statement of Cash Flows	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: 1) 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. 2) 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. 3) 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. 4) 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
Revenue from Contracts with Customers	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 principle 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 of 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 have chosen to use the cumulative catch-up transition method. ASU 2014-09 will be effective for fiscal years and interim periods beginning after December 15, 2017. Early application is not permitted. Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued 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 will be to our automotive business unit and 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. Based on our progress executing the five-step contract review process, we believe the implementation of ASU 2014-09 and any corresponding amendments will have an immaterial impact on the financial results of the Company.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 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 Nine Months 2017 2016 2017 2016 Weighted average number of shares for calculation of basic EPS 36,742,168 36,477,044 36,713,294 36,425,626 Stock options under equity incentive plans 62,908 117,537 117,919 132,737 Weighted average number of shares for calculation of diluted EPS 36,805,076 36,594,581 36,831,213 36,558,363
Common Stock Issuable upon Exercise of Certain Stock Options	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 Nine Months 2017 2016 2017 2016 Stock options outstanding for equity incentive plans 1,845,784 1,455,534 1,845,784 1,455,534

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss)	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 and nine month periods ended September 30, 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 September 30, 2017, goodwill assigned to our Automotive and Industrial segments were $23,514 and $30,773, respectively. As of September 30, 2016, goodwill assigned to our Automotive and Industrial segments were $22,362 and $30,573, respectively. Three Months Ended September 30, Automotive Industrial Reconciling Consolidated 2017: Product revenues $ 215,175 $ 20,678 $ — $ 235,853 Depreciation and amortization 9,423 1,334 715 11,472 Operating income (loss) 37,179 (5,607 ) (15,395 ) 16,177 2016: Product revenues $ 212,369 $ 20,256 $ — $ 232,625 Depreciation and amortization 8,631 989 557 10,177 Operating income (loss) 54,408 (4,899 ) (22,094 ) 27,415 Nine Months Ended September 30, Automotive Industrial Reconciling Consolidated 2017: Product revenues $ 652,820 $ 75,678 $ — $ 728,498 Depreciation and amortization 26,602 4,040 2,021 32,663 Operating income (loss) 128,018 (10,741 ) (41,028 ) 76,249 2016: Product revenues $ 634,636 $ 46,423 $ — $ 681,059 Depreciation and amortization 23,566 2,578 1,580 27,724 Operating income (loss) 133,271 (14,628) (38,990 ) 79,653
Product Revenues Information by Geographic Area	Total product revenues information by geographic area is as follows: Three Months Ended September 30, 2017 2016 United States $ 104,033 44 % $ 117,815 51 % China 25,741 11 % 21,573 9 % Germany 17,711 8 % 17,670 8 % South Korea 16,569 7 % 16,295 7 % Japan 15,727 7 % 10,532 4 % Canada 10,667 5 % 9,440 4 % Czech Republic 9,175 4 % 9,302 4 % United Kingdom 8,143 3 % 6,824 3 % Mexico 5,706 2 % 5,288 2 % Other 22,381 9 % 17,886 8 % Total Non U.S. 131,820 56 % 114,810 49 % $ 235,853 100 % $ 232,625 100 % Note 4 – Segment Reporting – Continued Nine Months Ended September 30, 2017 2016 United States $ 337,697 46 % $ 332,693 49 % China 66,168 9 % 57,983 9 % Germany 53,273 7 % 54,261 8 % South Korea 50,714 7 % 56,443 8 % Japan 43,103 6 % 32,545 5 % Canada 32,709 5 % 28,513 4 % Czech Republic 29,826 4 % 29,264 4 % United Kingdom 26,250 4 % 20,561 3 % Mexico 16,398 2 % 16,848 2 % Other 72,360 10 % 51,948 8 % Total Non U.S. 390,801 54 % 348,366 51 % $ 728,498 100 % $ 681,059 100 %

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Summary of Company's Debt	The following table summarizes the Company’s debt at September 30, 2017 and at December 31, 2016. September 30, 2017 December 31, Interest Principal Principal Credit Agreement: Revolving Note (U.S. Dollar Denominations) 2.99 % $ 129,000 $ 154,000 DEG China Loan 4.25 % 1,891 2,525 DEG Vietnam Loan 5.21 % 15,000 15,000 Total debt 145,891 171,525 Current portion (3,445 ) (2,092 ) Long-term debt, less current maturities $ 142,446 $ 169,433
Principal Maturities of Debt	The scheduled principal maturities of our debt as of September 30, 2017 are as follows: Year Revolving (U.S. Dollar) DEG DEG Total Remainder of 2017 $ — $ — $ 1,250 $ 1,250 2018 — 945 2,500 3,445 2019 — 946 2,500 3,446 2020 — — 2,500 2,500 2021 129,000 — 2,500 131,500 2022 — — 2,500 2,500 Thereafter — — 1,250 1,250 Total $ 129,000 $ 1,891 $ 15,000 $ 145,891

Derivative Financial Instrume20

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Information Related to Recurring Fair Value Measurement of Derivative Instruments in Our Consolidated Condensed Balance Sheet	Information related to the recurring fair value measurement of derivative instruments in our consolidated condensed balance sheet as of September 30, 2017 is as follows: Asset Derivatives Net Asset Hedge Designation Fair Value Hierarchy Balance Sheet Location Fair Value Foreign currency derivatives Cash flow hedge Level 2 Current assets $ 1,340 $ 1,340 Commodity derivatives Cash flow hedge Level 2 Current assets $ 202 $ 202
Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of Income	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 September 30, 2017 Three Months Ended September 30, 2016 Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Foreign currency derivatives Product revenues $ 54 $ — $ 54 $ — Cost of sales 1,424 (112 ) 1,303 23 Selling, general and administrative — — (216 ) 139 Other comprehensive income (1,234 ) (868 ) 2,541 (624 ) Foreign currency (loss) gain 15 (41 ) (62 ) 108 Total foreign currency derivatives $ 259 $ (1,021 ) $ 3,620 $ (354 ) Commodity derivatives Cost of sales $ (4 ) $ (157 ) $ 25 $ (510 ) Other comprehensive income 136 139 184 544 Total commodity derivatives $ 132 $ (18 ) $ 209 $ 34

Reclassifications Out of Accu21

Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2017 and September 30, 2016 are as follows: Defined Benefit Pension Plans Foreign Currency Translation Adjustments Commodity Hedge Derivatives Foreign Currency Hedge Derivatives Total Balance at June 30, 2017 $ (2,550 ) $ (37,071 ) $ 272 $ 1,741 $ (37,608 ) Other comprehensive income before reclassifications — 13,251 153 106 13,510 Income tax effect of other comprehensive income before reclassifications — (49 ) (56 ) (29 ) (134 ) Amounts reclassified from accumulated other comprehensive income into net income — — (17 ) a (1,340 ) a (1,357 ) Income taxes reclassified into net income — — 6 360 366 Net current period other comprehensive income — 13,202 86 (903 ) 12,385 Balance at September 30, 2017 $ (2,550 ) $ (23,869 ) $ 358 $ 838 $ (25,223 ) (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 June 30, 2016 $ (2,060 ) $ (47,645 ) $ 26 $ 179 $ (49,500 ) Other comprehensive income (loss) before reclassifications — 2,230 (8 ) (818 ) 1,404 Income tax effect of other comprehensive income (loss) before reclassifications — (13 ) 3 220 210 Amounts reclassified from accumulated other comprehensive (income) loss into net income — — 147 a (50 ) a 97 Income taxes reclassified into net income — — (54 ) 13 (41 ) Net current period other comprehensive income — 2,217 88 (635 ) 1,670 Balance at September 30, 2016 $ (2,060 ) $ (45,428 ) $ 114 $ (456 ) $ (47,830 ) (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 Reclassification adjustments and other activities impacting accumulated other comprehensive income (loss) during the nine months ended September 30, 2017 and September 30, 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 — 42,051 231 3,071 45,353 Income tax effect of other comprehensive income before reclassifications — (158 ) (84 ) (825 ) (1,067 ) Amounts reclassified from accumulated other comprehensive income into net income — — (47 ) a (530 ) a (577 ) Income taxes reclassified into net income — — 17 142 159 Net current period other comprehensive income — 41,893 117 1,858 43,868 Balance at September 30, 2017 $ (2,550 ) $ (23,869 ) $ 358 $ 838 $ (25,223 ) (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, 2015 $ (2,060 ) $ (49,381 ) $ (229 ) $ — $ (51,670 ) Other comprehensive income (loss) before reclassifications — 2,866 94 (117 ) 2,843 Income tax effect of other comprehensive income (loss) before reclassifications — 1,087 (35 ) 32 1,084 Amounts reclassified from accumulated other comprehensive (income) loss into net income — — 450 a (507 ) a (57 ) Income taxes reclassified into net income — — (166 ) 136 (30 ) Net current period other comprehensive income — 3,953 343 (456 ) 3,840 Balance at September 30, 2016 $ (2,060 ) $ (45,428 ) $ 114 $ (456 ) $ (47,830 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

The Company and Subsequent Ev22

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

Basis of Presentation and New23

Basis of Presentation and New Accounting Pronouncements (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016
Basis Of Presentation And New Accounting Pronouncements [Line Items]
Amount reclassified from prepaid expenses and other assets to other non-current assets		$ 4,390
Scenario, Forecast | ASU 2016-16 | Minimum
Basis Of Presentation And New Accounting Pronouncements [Line Items]
Increase in effective income tax rate	3.00%
Scenario, Forecast | ASU 2016-16 | Maximum
Basis Of Presentation And New Accounting Pronouncements [Line Items]
Increase in effective income tax rate	5.00%

Earnings Per Share (Detail)

Earnings Per Share (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average number of shares for calculation of basic EPS	36,742,168	36,477,044	36,713,294	36,425,626
Stock options under equity incentive plans	62,908	117,537	117,919	132,737
Weighted average number of shares for calculation of diluted EPS	36,805,076	36,594,581	36,831,213	36,558,363
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	1,845,784	1,455,534	1,845,784	1,455,534

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Segment Reporting Information [Line Items]
Goodwill	$ 54,287	$ 51,735
Automotive Segments
Segment Reporting Information [Line Items]
Goodwill	23,514		$ 22,362
Industrial Segments
Segment Reporting Information [Line Items]
Goodwill	$ 30,773		$ 30,573

Segment Information about Repor

Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Product revenues	$ 235,853	$ 232,625	$ 728,498	$ 681,059
Depreciation and amortization	11,472	10,177	32,663	27,724
Operating income (loss)	16,177	27,415	76,249	79,653
Operating Segments | Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	215,175	212,369	652,820	634,636
Depreciation and amortization	9,423	8,631	26,602	23,566
Operating income (loss)	37,179	54,408	128,018	133,271
Operating Segments | Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	20,678	20,256	75,678	46,423
Depreciation and amortization	1,334	989	4,040	2,578
Operating income (loss)	(5,607)	(4,899)	(10,741)	(14,628)
Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	715	557	2,021	1,580
Operating income (loss)	$ (15,395)	$ (22,094)	$ (41,028)	$ (38,990)

Segment Reporting (Detail)

Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Product revenues	$ 235,853	$ 232,625	$ 728,498	$ 681,059
Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	100.00%	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Product revenues	$ 104,033	$ 117,815	$ 337,697	$ 332,693
United States | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	44.00%	51.00%	46.00%	49.00%
China
Segment Reporting Information [Line Items]
Product revenues	$ 25,741	$ 21,573	$ 66,168	$ 57,983
China | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	11.00%	9.00%	9.00%	9.00%
Germany
Segment Reporting Information [Line Items]
Product revenues	$ 17,711	$ 17,670	$ 53,273	$ 54,261
Germany | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	8.00%	8.00%	7.00%	8.00%
South Korea
Segment Reporting Information [Line Items]
Product revenues	$ 16,569	$ 16,295	$ 50,714	$ 56,443
South Korea | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	7.00%	7.00%	7.00%	8.00%
Japan
Segment Reporting Information [Line Items]
Product revenues	$ 15,727	$ 10,532	$ 43,103	$ 32,545
Japan | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	7.00%	4.00%	6.00%	5.00%
Canada
Segment Reporting Information [Line Items]
Product revenues	$ 10,667	$ 9,440	$ 32,709	$ 28,513
Canada | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	5.00%	4.00%	5.00%	4.00%
Czech Republic
Segment Reporting Information [Line Items]
Product revenues	$ 9,175	$ 9,302	$ 29,826	$ 29,264
Czech Republic | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	4.00%	4.00%	4.00%	4.00%
United Kingdom
Segment Reporting Information [Line Items]
Product revenues	$ 8,143	$ 6,824	$ 26,250	$ 20,561
United Kingdom | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	3.00%	3.00%	4.00%	3.00%
Mexico
Segment Reporting Information [Line Items]
Product revenues	$ 5,706	$ 5,288	$ 16,398	$ 16,848
Mexico | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	2.00%	2.00%	2.00%	2.00%
Other
Segment Reporting Information [Line Items]
Product revenues	$ 22,381	$ 17,886	$ 72,360	$ 51,948
Other | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	9.00%	8.00%	10.00%	8.00%
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 131,820	$ 114,810	$ 390,801	$ 348,366
Non U.S. | Sales Revenue, Net | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total product revenues in percentage	56.00%	49.00%	54.00%	51.00%

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 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	1.06%
London Interbank Offered Rate
Debt Instrument [Line Items]
Interest rate	1.23%
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Aggregate principal amount available for borrowing	$ 221,000
Letter of credit net of outstanding amount	$ 330,000
Debt maturity date	Mar. 17, 2021
United State Bank Of America Credit Facility
Debt Instrument [Line Items]
Interest rate	4.25%
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 (Deta

Summary of Company's Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 145,891	$ 171,525
Current portion	(3,445)	(2,092)
Long-term debt, less current maturities	$ 142,446	169,433
Revolving Note (U.S. Dollar Denominations)
Debt Instrument [Line Items]
Interest Rate	2.99%
Total debt	$ 129,000	154,000
DEG China Loan
Debt Instrument [Line Items]
Interest Rate	4.25%
Total debt	$ 1,891	2,525
DEG Vietnam Loan
Debt Instrument [Line Items]
Interest Rate	5.21%
Total debt	$ 15,000	$ 15,000

Principal Maturities of Debt (D

Principal Maturities of Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt maturing in remainder of 2017	$ 1,250
Debt maturing in 2018	3,445
Debt maturing in 2019	3,446
Debt maturing in 2020	2,500
Debt maturing in 2021	131,500
Debt maturing in 2022	2,500
Thereafter	1,250
Total debt	145,891	$ 171,525
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Debt maturing in 2021	129,000
Total debt	129,000	154,000
DEG China Loan
Debt Instrument [Line Items]
Debt maturing in 2018	945
Debt maturing in 2019	946
Total debt	1,891	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 Instrume31

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 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	$ 28,856,000		$ 28,856,000		$ 29,538,000
Commodity Derivatives
Derivative [Line Items]
Notional Value	1,617,000		1,617,000		$ 407,000
Interest Rate Swap
Derivative [Line Items]
Hedge Ineffectiveness Incurred	$ 0	$ 0	$ 0	$ 0

Information Related to Recurrin

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	Sep. 30, 2017USD ($)
Foreign Currency Derivatives
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 1,340
Net Asset	1,340
Commodity Derivatives
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	202
Net Asset	$ 202

Information Related to Effect o

Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 259	$ (1,021)	$ 3,620	$ (354)
Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	132	(18)	209	34
Other comprehensive income | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(1,234)	(868)	2,541	(624)
Other comprehensive income | Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	136	139	184	544
Product revenues | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	54		54
Cost of sales | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	1,424	(112)	1,303	23
Cost of sales | Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(4)	(157)	25	(510)
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	$ 15	$ (41)	$ (62)	$ 108

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 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	145,891,000	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	1,891,000	2,525,000
Fair value	$ 1,900,000	$ 2,600,000

Schedule of Reclassification Ad

Schedule of Reclassification Adjustments and Other Activities Impacting Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (37,608)	$ (49,500)	$ (69,091)	$ (51,670)
Other comprehensive income (loss) before reclassifications		13,510	1,404	45,353	2,843
Income tax effect of other comprehensive income (loss) before reclassifications		(134)	210	(1,067)	1,084
Amounts reclassified from accumulated other comprehensive (income) loss into net income		(1,357)	97	(577)	(57)
Income taxes reclassified into net income		366	(41)	159	(30)
Net current period other comprehensive income		12,385	1,670	43,868	3,840
Ending Balance		(25,223)	(47,830)	(25,223)	(47,830)
Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(2,550)	(2,060)	(2,550)	(2,060)
Ending Balance		(2,550)	(2,060)	(2,550)	(2,060)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(37,071)	(47,645)	(65,762)	(49,381)
Other comprehensive income (loss) before reclassifications		13,251	2,230	42,051	2,866
Income tax effect of other comprehensive income (loss) before reclassifications		(49)	(13)	(158)	1,087
Net current period other comprehensive income		13,202	2,217	41,893	3,953
Ending Balance		(23,869)	(45,428)	(23,869)	(45,428)
Commodity Hedge Derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		272	26	241	(229)
Other comprehensive income (loss) before reclassifications		153	(8)	231	94
Income tax effect of other comprehensive income (loss) before reclassifications		(56)	3	(84)	(35)
Amounts reclassified from accumulated other comprehensive (income) loss into net income	[1]	(17)	147	(47)	450
Income taxes reclassified into net income		6	(54)	17	(166)
Net current period other comprehensive income		86	88	117	343
Ending Balance		358	114	358	114
Foreign Currency Hedge Derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		1,741	179	(1,020)
Other comprehensive income (loss) before reclassifications		106	(818)	3,071	(117)
Income tax effect of other comprehensive income (loss) before reclassifications		(29)	220	(825)	32
Amounts reclassified from accumulated other comprehensive (income) loss into net income	[1]	(1,340)	(50)	(530)	(507)
Income taxes reclassified into net income		360	13	142	136
Net current period other comprehensive income		(903)	(635)	1,858	(456)
Ending Balance		$ 838	$ (456)	$ 838	$ (456)
[1]	The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.