Gentherm (THRM) 10-Q 30 Oct 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 25, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	THRM
Entity Registrant Name	GENTHERM Inc
Entity Central Index Key	0000903129
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		32,659,545
Entity Shell Company	false
Entity File Number	0-21810
Entity Tax Identification Number	95-4318554
Entity Address, Address Line One	21680 Haggerty Road
Entity Address, City or Town	Northville
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48167
City Area Code	248
Local Phone Number	504-0500
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	MI
Document Quarterly Report	true
Security Exchange Name	NASDAQ
Title of 12(b) Security	Common Stock, no par value
Document Transition Report	false

Consolidated Condensed Balance

Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 45,200	$ 39,620
Restricted cash	2,504
Accounts receivable, less allowance of $1,040 and $851, respectively	170,823	166,858
Inventory:
Raw materials	65,337	61,679
Work in process	6,863	5,939
Finished goods	46,591	44,917
Inventory, net	118,791	112,535
Derivative financial instruments	897	92
Prepaid expenses and other assets	39,884	54,271
Assets held for sale	6,742	69,699
Total current assets	384,841	443,075
Property and equipment, net	162,783	171,380
Goodwill	63,501	55,311
Other intangible assets, net	51,338	56,385
Operating lease right-of-use assets	12,136
Deferred financing costs	1,692	647
Deferred income tax assets	54,380	64,024
Other non-current assets	7,000	12,225
Total assets	737,671	803,047
Current Liabilities:
Accounts payable	89,293	93,113
Accrued liabilities	67,482	65,808
Current lease liabilities	4,483
Current maturities of long-term debt	2,500	3,413
Liabilities held for sale	6,742	13,062
Total current liabilities	170,500	175,396
Pension benefit obligation	6,596	7,211
Non-current lease liabilities	7,391
Long-term debt, less current maturities	97,123	136,477
Deferred income tax liabilities	1,142	1,177
Other non-current liabilities	3,326	3,087
Total liabilities	286,078	323,348
Common Stock:
No par value; 55,000,000 shares authorized, 32,741,826 and 33,856,629 issued and outstanding at September 30, 2019 and December 31, 2018, respectively	103,781	140,300
Paid-in capital	11,348	14,934
Accumulated other comprehensive loss	(54,814)	(39,500)
Accumulated earnings	391,278	363,965
Total shareholders’ equity	451,593	479,699
Total liabilities and shareholders’ equity	$ 737,671	$ 803,047

Consolidated Condensed Balanc_2

Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,040	$ 851
Common Stock, par value
Common Stock, shares authorized	55,000,000	55,000,000
Common Stock, shares issued	32,741,826	33,856,629
Common Stock, shares outstanding	32,741,826	33,856,629

Consolidated Condensed Statemen

Consolidated Condensed Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Product revenues	$ 240,056	$ 261,504	$ 741,303	$ 792,490
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of sales	$ 165,364	$ 185,800	$ 518,590	$ 558,452
Gross margin	74,692	75,704	222,713	234,038
Operating expenses:
Net research and development expenses	18,838	19,056	56,990	63,382
Selling, general and administrative expenses	26,861	35,117	91,683	105,803
Restructuring expenses	8,664	5,818	11,809	12,898
Total operating expenses	54,363	59,991	160,482	182,083
Operating income	20,329	15,713	62,231	51,955
Interest expense	(1,148)	(1,241)	(3,756)	(3,661)
Foreign currency gain	4,083	125	3,482	721
Gain on sale of business			4,970
Impairment loss	(837)	(11,476)	(21,206)	(11,476)
Other income	231	212	545	1,538
Earnings before income tax	22,658	3,333	46,266	39,077
Income tax expense	6,771	3,688	19,214	9,807
Net income (loss)	$ 15,887	$ (355)	$ 27,052	$ 29,270
Basic earnings (loss) per share	$ 0.48	$ (0.01)	$ 0.81	$ 0.80
Diluted earnings (loss) per share	$ 0.48	$ (0.01)	$ 0.81	$ 0.80
Weighted average number of shares – basic	32,838,636	36,103,520	33,282,584	36,364,380
Weighted average number of shares – diluted	32,932,679	36,448,162	33,418,555	36,469,759

Consolidated Condensed Statem_2

Consolidated Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 15,887	$ (355)	$ 27,052	$ 29,270
Other comprehensive income (loss), gross of tax:
Foreign currency translation adjustments loss	(14,857)	(3,266)	(15,454)	(14,519)
Unrealized (loss) gain on foreign currency derivative securities	(257)	1,753	806	2,304
Unrealized loss on commodity derivative securities				(218)
Other comprehensive loss, gross of tax	(15,114)	(1,513)	(14,648)	(12,433)
Other comprehensive income (loss), related tax effect:
Cumulative effect of accounting change due to ASU 2018-02				(40)
Foreign currency translation adjustments loss	(315)	15	(489)	(217)
Unrealized (loss) gain on foreign currency derivative securities	55	(536)	(177)	(684)
Unrealized loss on commodity derivative securities				(59)
Other comprehensive loss, related tax effect	(260)	(521)	(666)	(1,000)
Other comprehensive loss, net of tax	(15,374)	(2,034)	(15,314)	(13,433)
Comprehensive income (loss)	$ 513	$ (2,389)	$ 11,738	$ 15,837

Consolidated Condensed Statem_3

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities:
Net income	$ 27,052	$ 29,270
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33,281	38,721
Deferred income taxes	5,072	(19)
Stock compensation	5,268	6,360
Defined benefit plan income	(754)	(219)
Provision of doubtful accounts	209	247
Loss on sale of property and equipment	319	2,273
Operating lease expense	4,477
Impairment loss	21,206	11,476
Gain on sale of business	(4,970)
Other	189
Changes in assets and liabilities:
Accounts receivable	(6,170)	(13,855)
Inventory	(5,512)	(3,510)
Prepaid expenses and other assets	9,594	(7,867)
Accounts payable	(3,097)	8,376
Accrued liabilities	(2,172)	(712)
Net cash provided by operating activities	83,992	70,541
Investing Activities:
Proceeds from the sale of property and equipment	137	703
Proceeds from sale of a business	47,500
Acquisition of subsidiary, net of cash acquired	(14,823)	(15)
Purchases of property and equipment	(18,340)	(31,815)
Net cash provided by (used in) investing activities	14,474	(31,127)
Financing Activities:
Borrowing of debt	29,470	18,000
Repayments of debt	(69,049)	(61,210)
Cash paid for financing costs	(1,278)
Cash paid for the cancellation of restricted stock	(1,213)	(882)
Proceeds from the exercise of Common Stock options	13,879	14,062
Repurchase of Common Stock	(58,040)	(64,151)
Net cash used in financing activities	(86,231)	(94,181)
Foreign currency effect	(4,151)	(1,253)
Net increase (decrease) in cash, cash equivalents and restricted cash	8,084	(56,020)
Cash, cash equivalents and restricted cash at beginning of period	39,620	103,172
Cash, cash equivalents and restricted cash at end of period	47,704	47,152
Supplemental disclosure of cash flow information:
Cash paid for taxes	6,676	19,255
Cash paid for interest	3,437	3,617
Supplemental disclosure of non-cash transactions:
Common Stock issued to Board of Directors and employees	$ 4,576	$ 3,893

Consolidated Condensed Statem_4

Consolidated Condensed Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	AOCI Attributable to Parent	Retained Earnings
Beginning Balance at Dec. 31, 2017	$ 553,874	$ 265,048	$ 15,625	$ (20,444)	$ 293,645
Beginning Balance (in shares) at Dec. 31, 2017		36,761,000
Cumulative effect of accounting change due to adoption of ASU | ASU 2014-09	(3,264)				(3,264)
Cumulative effect of accounting change due to adoption of ASU | ASU 2016-16	31,645				31,645
Cumulative effect of accounting change due to adoption of ASU | ASU 2018-02				(40)	40
Exercise of Common Stock options for cash	751	$ 1,061	(310)
Exercise of Common Stock options for cash (in shares)		57,000
Cancellation of restricted stock	(659)	$ (659)
Cancelation of restricted stock (in shares)		(24,000)
Stock option compensation	840		840
Common Stock issued to Board of Directors and employees	1,362	$ 1,362
Currency translation, net	11,665			11,665
Foreign currency hedge, net	1,545			1,545
Commodity hedge, net	(277)			(277)
Net income	12,966				12,966
Ending Balance at Mar. 31, 2018	610,448	$ 266,812	16,155	(7,551)	335,032
Ending Balance (in shares) at Mar. 31, 2018		36,794,000
Beginning Balance at Dec. 31, 2017	553,874	$ 265,048	15,625	(20,444)	293,645
Beginning Balance (in shares) at Dec. 31, 2017		36,761,000
Net income	29,270
Ending Balance at Sep. 30, 2018	550,321	$ 218,569	14,293	(33,877)	351,336
Ending Balance (in shares) at Sep. 30, 2018		35,749,000
Beginning Balance at Mar. 31, 2018	610,448	$ 266,812	16,155	(7,551)	335,032
Beginning Balance (in shares) at Mar. 31, 2018		36,794,000
Stock repurchase	(20,241)	$ (20,241)
Stock repurchase (in shares)		(629,000)
Exercise of Common Stock options for cash	4,215	$ 5,335	(1,120)
Exercise of Common Stock options for cash (in shares)		241,000
Cancellation of restricted stock	(223)	$ (223)
Cancelation of restricted stock (in shares)		(25,000)
Stock option compensation	803		803
Common Stock issued to Board of Directors and employees	1,057	$ 1,057
Commons stock issued to Board of Directors and employees (in shares)		20,000
Currency translation, net	(23,150)			(23,150)
Foreign currency hedge, net	(1,142)			(1,142)
Net income	16,659				16,659
Ending Balance at Jun. 30, 2018	588,426	$ 252,740	15,838	(31,843)	351,691
Ending Balance (in shares) at Jun. 30, 2018		36,401,000
Stock repurchase	(47,111)	$ (47,111)
Stock repurchase (in shares)		(938,000)
Exercise of Common Stock options for cash	9,098	$ 11,466	(2,368)
Exercise of Common Stock options for cash (in shares)		284,000
Stock option compensation	823		823
Common Stock issued to Board of Directors and employees	1,474	$ 1,474
Commons stock issued to Board of Directors and employees (in shares)		2,000
Currency translation, net	(3,251)			(3,251)
Foreign currency hedge, net	1,217			1,217
Net income	(355)				(355)
Ending Balance at Sep. 30, 2018	550,321	$ 218,569	14,293	(33,877)	351,336
Ending Balance (in shares) at Sep. 30, 2018		35,749,000
Beginning Balance at Dec. 31, 2018	$ 479,699	$ 140,300	14,934	(39,500)	363,965
Beginning Balance (in shares) at Dec. 31, 2018	33,856,629	33,857,000
Cumulative effect of accounting change due to adoption of ASU | ASU 2016-02	$ 261				261
Stock repurchase	(8,040)	$ (8,040)
Stock repurchase (in shares)		(200,000)
Exercise of Common Stock options for cash	214	$ 1,021	(807)
Exercise of Common Stock options for cash (in shares)		13,000
Cancellation of restricted stock	(376)	$ (376)
Cancelation of restricted stock (in shares)		(17,000)
Stock option compensation	386		386
Common Stock issued to Board of Directors and employees	1,581	$ 1,581
Currency translation, net	(4,251)			(4,251)
Foreign currency hedge, net	599			599
Net income	8,414				8,414
Ending Balance at Mar. 31, 2019	478,487	$ 134,486	14,513	(43,152)	372,640
Ending Balance (in shares) at Mar. 31, 2019		33,653,000
Beginning Balance at Dec. 31, 2018	$ 479,699	$ 140,300	14,934	(39,500)	363,965
Beginning Balance (in shares) at Dec. 31, 2018	33,856,629	33,857,000
Net income	$ 27,052
Ending Balance at Sep. 30, 2019	$ 451,593	$ 103,781	11,348	(54,814)	391,278
Ending Balance (in shares) at Sep. 30, 2019	32,741,826	32,742,000
Beginning Balance at Mar. 31, 2019	$ 478,487	$ 134,486	14,513	(43,152)	372,640
Beginning Balance (in shares) at Mar. 31, 2019		33,653,000
Stock repurchase	(25,000)	$ (25,000)
Stock repurchase (in shares)		(630,000)
Exercise of Common Stock options for cash	4,557	$ 4,936	(379)
Exercise of Common Stock options for cash (in shares)		116,000
Cancellation of restricted stock	(550)	$ (550)
Cancelation of restricted stock (in shares)		(21,000)
Stock option compensation	(114)		(114)
Common Stock issued to Board of Directors and employees	1,438	$ 1,438
Commons stock issued to Board of Directors and employees (in shares)		30,000
Currency translation, net	3,480			3,480
Foreign currency hedge, net	232			232
Net income	2,751				2,751
Ending Balance at Jun. 30, 2019	465,281	$ 115,310	14,020	(39,440)	375,391
Ending Balance (in shares) at Jun. 30, 2019		33,148,000
Stock repurchase	(25,000)	$ (25,000)
Stock repurchase (in shares)		(635,000)
Exercise of Common Stock options for cash	9,108	$ 12,201	(3,093)
Exercise of Common Stock options for cash (in shares)		228,000
Cancellation of restricted stock	(287)	$ (287)
Cancelation of restricted stock (in shares)		(12,000)
Stock option compensation	421		421
Common Stock issued to Board of Directors and employees	1,557	$ 1,557
Commons stock issued to Board of Directors and employees (in shares)		13,000
Currency translation, net	(15,172)			(15,172)
Foreign currency hedge, net	(202)			(202)
Net income	15,887				15,887
Ending Balance at Sep. 30, 2019	$ 451,593	$ 103,781	$ 11,348	$ (54,814)	$ 391,278
Ending Balance (in shares) at Sep. 30, 2019	32,741,826	32,742,000

Overview

Overview	9 Months Ended
	Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Overview	Note 1 – Overview Gentherm Incorporated is a global developer and marketer of innovative thermal management technologies for a broad range of heating and cooling and temperature control applications. Unless the context otherwise requires, the terms “Gentherm”, “Company”, “we”, “us” and “our” used herein refer to Gentherm Incorporated and its consolidated subsidiaries. Our products provide solutions for automotive passenger climate comfort and convenience, battery thermal management and cell connecting systems, as well as patient temperature management within the health care industry. Our automotive products can be found on the vehicles of nearly all major automotive manufacturers operating in North America, Europe and Asia. We operate in locations aligned with our major customers’ product strategies to provide locally enhanced design, integration and production capabilities and to identify future thermal technology product opportunities in both automotive and other markets. The Company is also developing a number of new technologies and products that will help enable improvements to existing products and to create new product applications for existing and new markets. Basis of Presentation The unaudited consolidated condensed financial statements included herein have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations. The information furnished in the consolidated condensed financial statements include all adjustments (consisting of only normal, recurring adjustments), considered necessary to present fairly the results of operations, financial position and cash flows of the Company. These financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. The operating results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. Certain amounts in the prior period’s financial statements have been reclassified to conform with the current period presentation. Notably, $2,565 and $7,883 in customer relationship amortization was reclassified from product revenues to selling, general and administrative expenses for the three and nine months ended September 30, 2018, respectively. In preparing these financial statements, management was required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. These estimates and assumptions are based on our historical experience, the terms of existing contracts, our evaluation of trends in the industry, information provided by our customers and suppliers and information available from other outside sources, as appropriate. However, these estimates and assumptions are subject to an inherent degree of uncertainty. As a result, actual results in these areas may differ significantly from our estimates.

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Pronouncements	Note 2 – New Accounting Pronouncements Recently Adopted Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standard Update (“ASU”) 2016-02, “Leases (Topic 842)” (as amended, “ASU 2016-02”). ASU 2016-02 requires lessees to recognize a lease liability and a right-of-use asset on the balance sheet for all leases, except for short-term leases with terms of twelve months or less. The lease liability represents the lessee’s obligation to make lease payments arising from a lease, and is measured as the present value of the lease payments. The right-of-use asset represents the lessee’s right to use a specified asset for the lease term, and is measured at the lease liability amount, adjusted for lease prepayment, lease incentives received and the lessee’s initial direct costs. Leases are to be classified as finance or operating leases, with classification affecting the pattern and classification of expense recognition in the statement of income (loss). The Company adopted ASU 2016-02 on January 1, 2019, by applying the modified retrospective method and recognized a cumulative-effect adjustment to the opening balance in retained earnings. Financial information has not been updated and disclosure under the new standard have not been provided to dates and periods before January 1, 2019 ASU 2016-02 did not have an impact on our consolidated condensed statements of income for the three and nine months ended September 30, 2019 , but had a significant impact on our consolidated condensed balance sheet as of September 30, 2019 . The cumulative effects of the changes made to the Company’s consolidated condensed balance sheet as of January 1, 2019 for the adoption of ASU 2016-02 were as follows: Balance as of December 31, 2018 Adjustments due to adoption of ASU 2016-02 Balance as of January 1, 2019 Prepaid expenses and other assets 54,271 (74 ) 54,197 Assets held for sale 69,699 4,127 73,826 Operating lease right-of-use assets — 13,019 13,019 Liabilities held for sale 13,062 4,136 17,198 Deferred tax liabilities 1,177 114 1,291 Non-current lease liabilities — 12,561 12,561 Accumulated earnings 363,965 261 364,226 The Company elected the package of practical expedients provided in ASU 2016-02, which permits a lessee to not reassess under the new standard its prior conclusions about lease identification, lease classification and initial direct costs. Gentherm elected the use-of-hindsight to determine whether lease terms included periods covered by the lessee’s option to extend or terminate a lease, whether to purchase the underlying asset at the end of the lease agreement, and in assessing impairment of operating lease right-of-use assets. Finally, Gentherm elected to not assess whether existing or expired land easements that were not previously accounted for as leases are or contain a lease. Land easements previously accounted for as leases were not eligible for this practical expedient. Recently Issued Accounting Pronouncements Not Yet Adopted Expected Credit Losses In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments in this update is permitted. We are currently in the process of determining the impact the implementation of ASU 2016-13 will have on the Company’s financial statements and note disclosures. Cloud Computing Arrangements That Are Service Contracts In August 2018, the FASB issued ASU 2018-15, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” ASU 2018-15 requires implementation costs incurred by customers in cloud computing arrangements to be deferred and recognized over the term of the arrangement if those costs would be capitalized by the customer in a software licensing arrangement under the internal-use software guidance. ASU 2018-15 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments in this update is permitted. We are currently in the process of determining the impact the implementation of ASU 2018-15 will have on the Company’s financial statements and note disclosures. Retirement Benefits In August 2018, the FASB issued ASU 2018-14, “Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans.” ASU 2018-14 removes certain disclosure requirements, including (i) the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year, and (ii) the amount and timing of plan assets expected to be returned to the employer. ASU 2018-14 also adds new disclosure requirements, including (i) the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates and (ii) an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. ASU 2018-14 is effective for annual periods ending after December 15, 2020. Early adoption of the amendments in this update is permitted. We are currently in the process of determining the impact the implementation of ASU 2018-14 will have on the Company’s financial statement note disclosures. Fair Value Measurement In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.” ASU 2018-13 removes certain disclosure requirements, including (i) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, (ii) the policy for timing of transfer between levels, and (iii) the valuation processes for Level 3 fair value measurements. ASU 2018-13 also adds new disclosure requirements, including (i) the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and (ii) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. ASU 2018-13 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of disclosures that are removed is permitted, but adoption is delayed for the new additional disclosures until their effective date. We are currently in the process of determining the impact the implementation of ASU 2018-13 will have on the Company’s financial statement note disclosures.

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Acquisitions and Divestitures	Note 3 – Acquisitions and Divestitures Divestiture of Cincinnati Sub-Zero Industrial Chamber Business (CSZ-IC) On February 1, 2019, as part of the Company’s Fit-for-Growth initiative to eliminate investments in non-core businesses, we completed the sale of the Cincinnati Sub-Zero industrial chamber business (“CSZ-IC”) and former Cincinnati Sub-Zero headquarters facility to Weiss Technik North America, Inc. for total cash proceeds of $47,500, including $2,500 of cash proceeds placed into an escrow account for a period of up to one year as partial security for the Company’s obligations under the sale agreement. In connection with the sale, Gentherm entered into an operating lease agreement for a portion of the office and manufacturing building space purchased by Weiss Technik North America, Inc. The Company recognized a $4,970 pre-tax gain on the sale of CSZ-IC during the nine months ended September 30, 2019. Acquisition of Stihler Electronic GmbH On April 1, 2019, Gentherm acquired Stihler Electronic GmbH (“Stihler”), a leading developer and manufacturer of patient and blood temperature management systems, for a purchase price of $15,476, net of cash acquired and including $653 of contingent consideration to be paid upon achievement of a milestone that must be completed by September 2020. In addition, the purchase agreement includes a contingent payment of $653 to be paid if the selling shareholder remains employed by Stihler through December 2020. This amount will be recorded as a component of selling, general and administrative expenses ratably over the service period. The results of operations of Stihler are reported within the Company’s Industrial segment from the date of acquisition. During the three and nine months ended September 30, 2019, the Company incurred acquisition-related costs of approximately $19 and $399, respectively. These amounts were recorded as incurred, within the Company's consolidated statements of income. The acquisition was accounted for as a business combination, with the total purchase price allocated on a preliminary basis using information available in the second quarter of 2019. The preliminary purchase price and related allocation to the acquired net assets of Stihler, based on their estimated fair values as of the acquisition date, are shown below: Purchase price, cash consideration, net of cash acquired $ 14,823 Purchase price, fair value of contingent consideration 653 Total purchase price, net of cash acquired 15,476 Accounts receivable $ 883 Inventory 1,698 Prepaid expenses and other assets 241 Operating lease right-of-use assets 263 Property and equipment 260 Other intangible assets 4,380 Goodwill 9,816 Assumed liabilities (2,065 ) Net assets acquired $ 15,476 Other intangible assets primarily include amounts recognized for the fair value of customer-related intangible assets, which will be amortized over their estimated useful lives of approximately 9 years. The estimated fair value of these assets was based on third-party valuations and management’s estimates, generally utilizing an income approach. Goodwill recognized in this transaction is primarily attributable to intangible assets that do not qualify for separate recognition. It is estimated that $2,524 of the goodwill recognized will be deductible for income tax purposes. The purchase price and related allocation are preliminary and could be revised for up to one year from the acquisition date as a result of adjustments made to the purchase price, additional information obtained regarding liabilities assumed, including, but not limited to, contingent liabilities, revisions of provisional estimates of fair values, including, but not limited to, the completion of independent appraisals and valuations related to property, plant and equipment and intangible assets, and certain tax attributes. The pro forma effect of the Stihler acquisition does not materially impact the Company’s reported results for any period presented, and as a result no pro forma financial statements are presented.

Assets and Liabilities Held for

Assets and Liabilities Held for Sale	9 Months Ended
	Sep. 30, 2019
Discontinued Operations And Disposal Groups [Abstract]
Assets and Liabilities Held for Sale	Note 4 – Assets and Liabilities Held for Sale During 2018, the Company determined that its Gentherm Global Power Technologies (“GPT”) business met the held for sale criteria and recognized $2,190 in impairment loss. During 2019, the Company continued to assess the fair value of the GPT disposal group, less costs to sell, at each reporting period. As a result of these fair value measurements, the Company recorded additional impairment losses of $837 and $16,720 for the three and nine months ended September 30, 2019, respectively. Additionally, during the first quarter of 2019, the Company determined that an equity investment met the held for sale criteria and recognized impairment losses of $0 and $4,486 for the three and nine months ended September 30, 2019, respectively. Subsequent to the end of the Company's third quarter, effective October 1, 2019, the Company completed the divesture of GPT. The Company expects to record approximately $6,000 pre-tax loss on sale, in the fourth quarter of 2019, which includes approximately $4,000 related to the release of previously deferred foreign currency translation losses recorded in accumulated other comprehensive loss. The assets and liabilities of the GPT disposal group classified as held for sale as of September 30, 2019 are as follows: Cash $ 1,422 Accounts receivable, net 2,238 Inventory, net 4,936 Prepaid expenses and other assets 215 Operating lease right-of-use assets 3,926 Investment — Property and equipment, net 7,356 Other intangible assets, net 1,033 Deferred income tax assets 4,371 Impairment loss (18,910 ) Total assets held for sale $ 6,587 Accounts payable 420 Accrued liabilities 2,238 Operating lease liabilities 3,929 Total liabilities held for sale $ 6,587 The equity investment described above, does not have a readily determinable fair value and is measured at cost, less impairments, adjusted for observable price changes in orderly transactions for identical or similar investments of the same issuer.

Restructuring

Restructuring	9 Months Ended
	Sep. 30, 2019
Restructuring And Related Activities [Abstract]
Restructuring	Note 5 – Restructuring Manufacturing Footprint Rationalization On September 23, 2019, the Company committed to a restructuring plan to improve the Company’s manufacturing productivity and rationalize its footprint. Under this plan, the Company will relocate and consolidate certain existing automotive manufacturing and, as a result, certain other activities, overall reducing the number of plants by two. During the third quarter of 2019, the Company recognized expense of $5,200 for employee separation costs that will be paid pursuant to the terms of statutory requirements of the affected locations. Additionally, the Company recognized $1,612 of accelerated depreciation and fixed asset impairment. The Company expects to incur total costs of between $20,000 and $24,000, of which between $17,000 and $21,000 are expected to be cash expenditures. The total expected costs include employee separation costs of between $9,000 and $11,000, capital expenditures of between $4,500 and $5,500 and non-cash expenses for accelerated depreciation and impairment of fixed assets of approximately $3,000. The Company also expects to incur other transition costs including recruiting, relocation, and machinery and equipment move and set up costs of between $3,500 and $4,500. The actions under this plan are expected to be substantially completed by the end of 2021. The actual timing, costs and savings of the Plan may differ materially from the Company’s current expectations and estimates. Other Restructuring Activities As part of the Company’s continued efforts to optimize its cost structure, the Company has undertaken several discrete restructuring actions. During the three and nine months ended September 30, 2019, the Company recognized $1,467 and $2,726 of employee separation costs, respectively, and $385 and $734 of other related costs, respectively. These restructuring expenses were primarily associated with restructuring actions focused on the rotation of our manufacturing footprint to lower cost locations and the reduction of global overhead costs. These discrete restructuring actions are expected to approximate the total cumulative costs for those actions. The Company will continue to explore opportunities to improve its future profitability and competitiveness. These actions may result in the recognition of additional restructuring charges that could be material. During the three and nine months ended September 30, 2018, the Company recognized $3,303 and $5,040 of employee separation costs, respectively, and $1,332 and $2,831 of other related costs, respectively. Advanced Research and Development Rationalization and Site Consolidation In June 2018, Gentherm completed the sale of its battery management systems division located in Irvine, California. A loss on the sale of $1,107 was recognized in restructuring expenses during nine months ended September 30, 2018. An additional asset impairment loss of $0 and $425 was recognized during the three and nine months ended September 30, 2019. During the three and nine months ended September 30, 2018, Gentherm recognized employees separation costs of $157 and $1,038, respectively, and $589 and $1,024 of other related costs associated with the closure of two leased facilities located in Azusa, California. The Company also recognized $50 and $1,250 for the three and nine months ended September 30, 2018, for the disposal of long-lived assets controlled and used in Azusa, California. The Company has recorded approximately $4,669 of restructuring expenses since inception of this program and it is considered complete. GPT and CSZ-IC During 2018, Gentherm launched a program to actively market GPT and CSZ-IC. Costs associated with the divestiture process were classified as restructuring. During the three and nine months ended September 30, 2019, the Company recognized $0 and $251 of employee separation costs, respectively, and $0 and $861 of other related costs, respectively. During the three and nine months ended September 30, 2018, the Company recognized $262 and $472 of employee separation costs, and $125 and $125 of other related costs, respectively. The Company has recorded approximately $2,173 of restructuring expenses since inception of this program and it is considered substantially complete. Restructuring Expenses By Reporting Segment The following table summarizes restructuring activity for the three and nine months ended September 30, 2019 and 2018 by reporting segment: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Automotive $ 7,820 $ 2,919 $ 9,016 $ 4,038 Industrial 88 1,486 1,689 5,320 Reconciling Items 756 1,413 1,104 3,540 Total $ 8,664 $ 5,818 $ 11,809 $ 12,898 Restructuring Liability Restructuring liabilities are classified as accrued liabilities on the consolidated condensed balance sheets. The following table summarizes restructuring activity for the nine months ended September 30, 2019: Employee Separation Costs Accelerated Depreciation and Asset Impairment Charges Other related costs Total Balance at December 31, 2018 $ 2,079 $ — $ 468 $ 2,547 Additions, charged to restructuring expenses 8,177 2,037 1,595 11,809 Cash payments (4,069 ) — (1,458 ) (5,527 ) Non-cash utilization — (2,037 ) — (2,037 ) Reclassification to lease liability — — (193 ) (193 ) Balance at September 30, 2019 $ 6,187 $ — $ 412 $ 6,599

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings per Share	Note 6 – 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 September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Weighted average number of shares for calculation of basic EPS 32,838,636 36,103,520 33,282,584 36,364,380 Stock options, restricted stock awards and restricted stock units under equity incentive plans 94,043 344,642 135,971 105,379 Weighted average number of shares for calculation of diluted EPS 32,932,679 36,448,162 33,418,555 36,469,759 The following table represents Common Stock issuable upon the exercise of certain stock options that have been excluded from the diluted earnings calculation because the effect of their inclusion would be anti-dilutive. Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Stock options outstanding for equity incentive plans 441,435 12,000 441,435 1,359,250

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segment Reporting	Note 7 – Segment Reporting Segment information is used by management for making strategic operating decisions for the Company. Management evaluates the performance of the Company’s segments based primarily on operating income or loss. The Company’s reportable segments are as follows: • Automotive – this segment represents the design, development, manufacturing and sales of automotive climate control seat (CCS) products, seat heaters, steering wheel heaters, automotive cables, battery thermal management (BTM), electronics and other automotive products. • Industrial – the combined operating results of GPT, Gentherm Medical and Gentherm’s advanced research and development division. We perform advanced research and development on thermal management systems, including those that utilize new proprietary comfort software algorithms, to enhance the efficiency and functionality of our automotive heating and cooling products. Unlike research and development that relates to a specific product application for a customer, advanced research and development activities affect products and technologies that are not currently generating product revenues. The segment includes government sponsored research projects. • Reconciling Items – include corporate selling, general and administrative costs and acquisition transaction costs. 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 months ended September 30, 2019 and 2018. With the exception of goodwill, asset information by segment is not reported since the Company does not manage assets at a segment level. Three Months Ended September 30, Automotive Industrial (1) Reconciling Items Consolidated Total 2019: Product revenues $ 228,243 $ 11,813 $ — $ 240,056 Depreciation and amortization 10,170 480 414 11,064 Operating income (loss) 36,629 (3,496 ) (12,804 ) 20,329 2018: Product revenues (1) $ 238,849 $ 22,655 $ — $ 261,504 Depreciation and amortization 11,060 1,170 668 12,898 Operating income (loss) 37,908 (4,335 ) (17,860 ) 15,713 Nine Months Ended September 30, Automotive Industrial (1) Reconciling Items Consolidated Total 2019: Product revenues $ 700,300 $ 41,003 $ — $ 741,303 Depreciation and amortization 30,660 1,319 1,302 33,281 Operating income (loss) 114,456 (12,131 ) (40,094 ) 62,231 2018: Product revenues (1) $ 724,420 $ 68,070 $ — $ 792,490 Depreciation and amortization 32,839 3,822 2,060 $ 38,721 Operating income (loss) 116,312 (18,896 ) (45,461 ) 51,955 (1) Industrial segment includes $3,418 and $30,460 in product revenues, $0 and $1,894 in depreciation and amortization, and $206 and $659 in operating income from CSZ-IC for the nine months ended September 30, 2019 and 2018, respectively. Automotive and Industrial segment product revenues by product category for the three and nine months ended September 30, 2019 and 2018 are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Climate Control Seats (CCS) $ 88,133 $ 97,578 $ 270,924 $ 276,191 Seat Heaters 71,030 70,768 218,578 235,164 Steering Wheel Heaters 16,621 18,095 49,620 53,192 Automotive Cables 20,361 24,961 66,316 77,471 Battery Thermal Management (BTM) (a) 11,890 7,461 31,531 18,863 Electronics 11,729 12,590 36,035 44,409 Other Automotive 8,479 7,396 27,296 19,130 Subtotal Automotive $ 228,243 $ 238,849 $ 700,300 $ 724,420 Remote Power Generation (GPT) 3,477 4,378 11,181 14,310 Industrial Chambers — 9,829 3,418 30,460 Gentherm Medical 8,336 8,448 26,404 23,300 Subtotal Industrial $ 11,813 $ 22,655 $ 41,003 $ 68,070 Total Company $ 240,056 $ 261,504 $ 741,303 $ 792,490 a) Battery Thermal Management or BTM product revenues include Gentherm’s automotive grade, low cost, heat resistant fans and blowers used by customer for battery cooling through ventilation and production level shipments of the advanced TED based active cool system. Total product revenues information by geographic area is as follows (based on shipment destination): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 United States $ 111,570 $ 125,936 $ 340,656 $ 369,798 Germany 20,379 22,681 63,889 68,670 Japan 20,508 16,672 59,102 43,520 China 17,591 22,756 49,598 71,887 South Korea 14,543 12,814 45,098 42,419 Czech Republic 8,805 10,742 30,956 33,563 Canada 8,833 7,778 29,226 33,482 United Kingdom 8,315 9,037 23,980 28,349 Other 29,512 33,088 98,798 100,802 Total Non-U.S. $ 128,486 $ 135,568 $ 400,647 $ 422,692 $ 240,056 $ 261,504 $ 741,303 $ 792,490

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2019
Revenue Recognition And Deferred Revenue [Abstract]
Revenue Recognition	Note 8 – Revenue Recognition The aggregate amount of transaction price allocated to material rights that remain unsatisfied as of September 30, 2019 is $747. We expect to recognize into revenue, 42% of this balance in the next 3 months, and the remaining 33%, 9%, 9% and 7% in 2020, 2021, 2022 and 2023, respectively. Unearned revenue related to the Automotive segment was $747 and $1,597 as of September 30, 2019 and December 31, 2018, respectively. Changes in unearned revenue were as follows: Nine Months Ended September 30, 2019 Balance, beginning of period $ 1,597 Additions to unearned revenue 549 Reclassified to revenue (1,211 ) Reclassified to held for sale (168 ) Currency impacts (20 ) Balance, end of period $ 747 Revenue allocated to remaining performance obligations represents contracted revenue that has not yet been recognized, which includes unearned revenue and amounts that will be invoiced and recognized as revenue in future periods. Total costs to obtain a contract that were recognized on the consolidated condensed balance sheets as of September 30, 2019 and December 31, 2018 were immaterial.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Note 9 – Income Taxes At the end of each interim period, the Company makes its best estimate of the annual expected effective income tax rate and applies that rate to its ordinary year-to-date earnings or loss. The income tax provision or benefit related to unusual or infrequent items, if applicable, that will be separately reported or reported net of their related tax effects are individually computed and recognized in the interim period in which those items occur. In addition, the effect of changes in enacted tax laws or rates, tax status, judgment on the realizability of a beginning-of-the-year deferred tax asset in future years or income tax contingencies is recognized in the interim period in which the change occurs. The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in respective jurisdictions, permanent and temporary differences, and the likelihood of the realizability of deferred tax assets generated in the current year. Jurisdictions with a projected loss for the year or a year-to-date loss for which no tax benefit or expense can be recognized due to a valuation allowance are excluded from the estimated annual effective tax rate. The impact of such an exclusion could result in a higher or lower effective tax rate during a particular quarter, based upon the composition and timing of actual earnings compared to annual projections. The estimates used to compute the provision or benefit for income taxes may change as new events occur, additional information is obtained or as our tax environment changes. To the extent that the expected annual effective income tax rate changes, the effect of the change on prior interim periods is included in the income tax provision in the period in which the change in estimate occurs. A summary of the provision for income taxes and the corresponding effective tax rate for the three and nine months ended September 30, 2019 and September 30, 2018, is shown below (in thousands, except effective tax rates): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Income tax expense $ 6,771 $ 3,688 $ 19,214 $ 9,807 Earnings before income tax $ 22,658 $ 3,333 $ 46,266 $ 39,077 Effective tax rate 29.9 % 110.7 % 41.5 % 25.1 % Income tax expense excluding impairment loss $ 6,771 $ 3,688 $ 19,214 $ 9,807 Earnings before income tax excluding impairment loss $ 23,495 $ 14,809 $ 67,472 $ 50,553 Effective tax rate excluding impairment loss 28.8 % 24.9 % 28.5 % 19.4 % For the nine months ended September 30, 2019, the Company recognized a loss of $21,206 related to an impairment loss for which no tax benefit was provided. Similarly, for the nine months ended September 30, 2018, the Company recognized a loss of $11,476 related to a non-deductible impairment loss. Income tax expense, earnings before income tax and effective tax rate excluding the impairment loss are noted above. The Company’s effective tax rate for the three months ended September 30, 2018 included a discrete benefit related to stock-based compensation. For the nine months ended September 30, 2018, the Company’s effective tax rate included a discrete benefit related to certain intercompany transactions which disproportionately benefited lower tax rate jurisdictions. The annual effective tax rates differ from the U.S. statutory rate primarily due to foreign rates which differ from those in the U.S., U.S. taxes on foreign earnings, the realization of certain business tax credits, including research and development and foreign tax credits, and the applicable withholding taxes on the projected future repatriations of the earnings from the Company’s non-U.S. operations that are not considered permanently reinvested.

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	Note 10 – Goodwill A summary of changes in the carrying amount of goodwill, by operating segment, for the nine months ended September 30, 2019 is as follows: Nine Months Ended September 30, 2019 Automotive Industrial Total Balance, beginning of period $ 37,533 $ 17,778 $ 55,311 Stihler acquisition — 9,816 9,816 Currency impact (1,388 ) (238 ) (1,626 ) Balance, end of period $ 36,145 $ 27,356 $ 63,501

Debt

Debt	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Debt	Note 11 – Debt Amended Credit Agreement As of December 31, 2018, the Company, together with certain direct and indirect subsidiaries, had a credit agreement (the “Credit Agreement”) which included a revolving credit note (“U.S. Revolving Note”) with a maximum borrowing capacity of $350,000. On June 27, 2019, the Company entered into an Amended and Restated Credit Agreement (the “Amended Credit Agreement”) with a consortium of lenders and Bank of America, N.A. as administrative agent. The Amended Credit Agreement amends and restates in its entirety the Credit Agreement. The outstanding principal and interest of the U.S. Revolving Note under the Credit Agreement continued and constitute obligations under the Amended Credit Agreement. The Amended Credit Agreement increased the U.S. Revolving Note from $350,000 to $475,000 and extended the maturity from March 17, 2021 to June 27, 2024. Subject to specified conditions, the Company can increase the U.S. Revolving Note or incur secured term loans in an aggregate amount of $175,000. The U.S. borrowers and guarantors participating in the Amended Credit Agreement have entered into a related amended and restated pledge and security agreement. The amended and restated security agreement grants a security interest to the lenders in substantially all of the personal property of the Company and its U.S. 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-U.S. subsidiaries). In addition to the security obligations, all obligations under the Amended Credit Agreement are unconditionally guaranteed by certain of the Company’s subsidiaries. The Amended Credit Agreement restricts the amount of dividend payments the Company can make to shareholders. The Amended Credit Agreement requires the Company and its subsidiaries to comply with customary affirmative and negative covenants, and contain customary events of default. The Amended Credit Agreement also requires the Company to maintain a minimum Consolidated Interest Coverage Ratio and Consolidated Leverage Ratio, as defined in the agreement. 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 (1.90% at September 30, 2019) plus 0.50%, Bank of America’s prime rate (5.00% at September 30, 2019), or the Eurocurrency rate (0.00% at September 30, 2019) plus 1.00%. The rate for Eurocurrency Rate Loans denominated in U.S. Dollars is equal to the London Interbank Offered Rate (2.02% at September 30, 2019). All loans denominated in a currency other than the U.S. Dollar must be Eurocurrency Rate Loans. Interest is payable at least quarterly. The Applicable Rate varies based on the Consolidated Leverage Ratio reported by the Company. As long as the Company is not in default of the terms and conditions of the Amended Credit Agreement, the lowest and highest possible Applicable Rate is 1.25% and 2.25%, respectively, for Eurocurrency Rate Loans and 0.25% and 1.25%, respectively, for Base Rate Loans. In connection with the Amended Credit Agreement, the Company incurred debt issuance costs of $1,278 which have been capitalized and will be amortized into interest expense over the term of the credit facility. 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”), was subject to semi-annual principal payments that began March 2015 and ended in September 2019. During the third quarter of 2019, the DEG China Loan was paid in full. DEG Vietnam Loan The Company’s second fixed interest rate loan agreement with DEG was used to finance the construction and set up of the Vietnam production facility (“DEG Vietnam Loan”). The DEG Vietnam Loan is subject to semi-annual principal payments that began November 2017 and will end May 2023. Under the terms of the DEG Vietnam Loan, the Company must maintain a minimum Equity Ratio and Enhanced Equity Ratio, as defined by the DEG Vietnam Loan agreement, based on the financial statements of Gentherm’s wholly owned subsidiary, Gentherm Vietnam Co. Ltd. Undrawn borrowing capacity under the U.S. Revolving Note was $385,129 as of September 30, 2019. The following table summarizes the Company’s debt as of September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 Interest Rate Principal Balance Principal Balance Amended Credit Agreement: U.S. Revolving Note (U.S. Dollar Denominations) 3.29% $ 70,000 $ 122,000 U.S. Revolving Note (Euro Denominations) 1.25% 19,623 5,727 DEG China Loan — — 913 DEG Vietnam Loan 5.21% 10,000 11,250 Total debt 99,623 139,890 Current portion (2,500 ) (3,413 ) Long-term debt, less current maturities $ 97,123 $ 136,477 The scheduled principal maturities of our debt as of September 30, 2019 are as follows: Year U.S. Revolving Note DEG Vietnam Note Total Remainder of 2019 $ — $ 1,250 $ 1,250 2020 — 2,500 2,500 2021 — 2,500 2,500 2022 — 2,500 2,500 2023 — 1,250 1,250 2024 89,623 — 89,623 Total $ 89,623 $ 10,000 $ 99,623 As of September 30, 2019, we were in compliance, in all material respects, with all terms as outlined in the Amended Credit Agreement and DEG Vietnam Loan.

Financial Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Financial Instruments	Note 12 – Financial Instruments Cash, cash equivalents and restricted cash The Company has cash that is legally restricted as to use or withdrawal. A reconciliation of cash and cash equivalents on the consolidated condensed balance sheets to cash, cash equivalents and restricted cash presented on the consolidated condensed statements of cash flows is as follows: September 30, 2019 December 31, 2018 September 30, 2018 December 31, 2017 Cash and cash equivalents presented in the consolidated condensed balance sheets $ 45,200 $ 39,620 $ 47,152 $ 103,172 Restricted cash 2,504 — — — Cash, cash equivalents and restricted cash presented in the consolidated condensed statements of cash flows $ 47,704 $ 39,620 $ 47,152 $ 103,172 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 a location’s functional currency, foreign plant operations, intercompany indebtedness, intercompany investments and include exposures to the European Euro, Mexican Peso, Canadian Dollar, Hungarian Forint, Macedonian Denar, Ukrainian Hryvnia, Japanese Yen, Chinese Renminbi, Korean Won and Vietnamese Dong. The Company regularly enters into derivative contracts with the objective of managing its financial and operational exposure arising from these risks by offsetting gains and losses on the underlying exposures with gains and losses on the financial instruments used to hedge them. The maximum length of time over which we hedge our exposure to foreign currency exchange risks is one year. We had foreign currency derivative contracts with a notional value of $25,210 and $33,250 outstanding as of September 30, 2019 and December 31, 2018, respectively. The maximum length of time over which we hedge our exposure to price fluctuations in material commodities is two years. No commodity swap contracts were outstanding at September 30, 2019 or at December 31, 2018. We do not enter into derivative financial instruments for speculative or trading purposes. Our hedging relationships are formally documented at the inception of the hedge, and hedges must be highly effective in offsetting changes to future cash flows on hedged transactions both at the inception of a hedge and on an ongoing basis to be designated for hedge accounting treatment. For derivative contracts which can be classified as a cash flow hedge, the effective portion of the change in the fair value of the derivative is recorded to accumulated other comprehensive loss in the consolidated balance sheet. When the underlying hedge transaction is realized, the gain or loss included in accumulated other comprehensive loss is recorded in earnings in the consolidated 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 statements of income. See Note 14 for the amount of unrealized loss associated with foreign currency derivatives previously reported in accumulated other comprehensive loss that was reclassified into earnings during 2019. Though we continuously monitor the hedging program, derivative positions and hedging strategies, foreign currency forward exchange agreements have not always been designated as hedging instruments for accounting purposes. The Company uses an income approach to value derivative instruments, analyzing quoted market prices to calculate the forward values and then discounts such forward values to the present value using benchmark rates at commonly quoted intervals for the instrument’s full term. Information related to the recurring fair value measurement of derivative instruments in our consolidated condensed balance sheet as of September 30, 2019 is as follows: Asset Derivatives Liability Derivatives Hedge Designation Fair Value Hierarchy Balance Sheet Location Fair Value Balance Sheet Location Fair Value Net Asset/ (Liabilities) Foreign currency derivatives Cash flow hedge Level 2 Current assets $ 897 Current liabilities $ — $ 897 Information relating to the effect of derivative instruments on our consolidated condensed statements of income is as follows: Location Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Foreign currency derivatives Cost of sales $ 328 $ 391 $ 1,003 $ (214 ) Selling, general and administrative — — — 75 Other comprehensive income (257 ) 1,753 806 2,304 Foreign currency gain (loss) 18 11 (51 ) 58 Total foreign currency derivatives $ 89 $ 2,155 $ 1,758 $ 2,223 Commodity derivatives Cost of sales $ — $ — $ — $ 145 Other comprehensive income — — — $ (218 ) Total commodity derivatives $ — $ — $ — $ (73 ) We did not incur any hedge ineffectiveness during the three and nine months ended September 30, 2019 and 2018.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 13 – Fair Value Measurements 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. Items Measured at Fair Value on a Recurring Basis Except for derivative instruments (see Note 12) and the held for sale disposal group (see Note 4), the Company had no material financial assets and liabilities that are carried at fair value at September 30, 2019 and December 31, 2018. The carrying amounts of financial instruments comprising cash and cash equivalents, restricted cash, accounts receivable and accounts payable approximate their fair values due to the relatively short maturity of such instruments. Items Measured at Fair Value on a Nonrecurring Basis The Company measures certain assets and liabilities at fair value on a non-recurring basis, which are not included above. For further information related to assets and liabilities measured at fair value on a non-recurring basis, see Note 3, "Acquisitions and Divestitures" and Note 4, “Assets and Liabilities Held for Sale”. As of September 30, 2019, there were no additional significant assets or liabilities measured at fair value on a non-recurring basis. Items Not Carried at Fair Value 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). As of September 30, 2019, and December 31, 2018, the carrying values of the indebtedness under the Company’s Amended Credit Agreement and Credit Agreement, 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 11). Discount rates used to measure the fair value of the DEG Vietnam Loan and DEG China Loan are based on quoted swap rates. As of September 30, 2019, the carrying value and estimated fair value of the DEG Vietnam Loan were $10,000 and $10,213, respectively. As of December 31, 2018, the carrying value of the DEG Vietnam Loan and DEG China Loan were $11,250 and $913, respectively, as compared to an estimated fair value of $11,100 and $900, respectively.

Reclassifications Out of Accumu

Reclassifications Out of Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)	Note 14 – Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Reclassification adjustments and other activities impacting accumulated other comprehensive income (loss) during the three and nine months ended September 30, 2019 and 2018 are as follows: Defined Benefit Pension Plans Foreign Currency Translation Adjustments Foreign Currency Hedge Derivatives Total Balance at June 30, 2019 $ (2,339 ) $ (37,928 ) $ 827 $ (39,440 ) Other comprehensive income (loss) before reclassifications — (14,857 ) 167 (14,690 ) Income tax effect of other comprehensive income (loss) before reclassifications — (315 ) (36 ) (351 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — (424 ) a (424 ) Income taxes reclassified into net income (loss) — — 91 91 Net current period other comprehensive income (loss) — (15,172 ) (202 ) (15,374 ) Balance at September 30, 2019 $ (2,339 ) $ (53,100 ) $ 625 $ (54,814 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales. Defined Benefit Pension Plans Foreign Currency Translation Adjustments Foreign Currency Hedge Derivatives Total Balance at June 30, 2018 $ (2,406 ) $ (29,040 ) $ (397 ) $ (31,843 ) Other comprehensive income (loss) before reclassifications — (3,266 ) 1,586 (1,680 ) Income tax effect of other comprehensive income (loss) before reclassifications — 15 (491 ) (476 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — 167 a 167 Income taxes reclassified into net income (loss) — — (45 ) (45 ) Net current period other comprehensive income (loss) — (3,251 ) 1,217 (2,034 ) Balance at September 30, 2018 $ (2,406 ) $ (32,291 ) $ 820 $ (33,877 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales. Defined Benefit Pension Plans Foreign Currency Translation Adjustments Foreign Currency Hedge Derivatives Total Balance at December 31, 2018 $ (2,339 ) $ (37,157 ) $ (4 ) $ (39,500 ) Other comprehensive income (loss) before reclassifications — (15,454 ) 1,359 (14,095 ) Income tax effect of other comprehensive income (loss) before reclassifications — (489 ) (296 ) (785 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — (553 ) a (553 ) Income taxes reclassified into net income (loss) — — 119 119 Net current period other comprehensive income (loss) — (15,943 ) 629 (15,314 ) Balance at September 30, 2019 $ (2,339 ) $ (53,100 ) $ 625 $ (54,814 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales. Defined Benefit Pension Plans Foreign Currency Translation Adjustments Commodity Hedge Derivatives Foreign Currency Hedge Derivatives Total Balance at December 31, 2017 $ (2,366 ) $ (17,555 ) $ 277 $ (800 ) $ (20,444 ) Cumulative effect of accounting change due to adoption of ASU 2018-02 (40 ) — — — (40 ) Other comprehensive income (loss) before reclassifications — (14,519 ) — 2,048 (12,471 ) Income tax effect of other comprehensive income (loss) before reclassifications — (217 ) — (615 ) (832 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — (218 ) a 256 a 38 Income taxes reclassified into net income (loss) — — (59 ) (69 ) (128 ) Net current period other comprehensive income (loss) (40 ) (14,736 ) (277 ) 1,620 (13,433 ) Balance at September 30, 2018 $ (2,406 ) $ (32,291 ) $ — $ 820 $ (33,877 ) (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 loss as of September 30, 2019 to be reclassified into earnings during the next twelve months. See Note 12 for additional information about derivative financial instruments and the effects from reclassification to net income (loss).

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Note 15 – Leases The Company has operating leases for office, manufacturing and research and development facilities, as well as land leases for certain manufacturing facilities that are accounted for as operating leases. We also have operating leases for office equipment and automobiles. Excluding land leases, our leases have remaining lease terms ranging from less than 1 year to 7 years and may include options to extend the lease for an additional term equal to the original term of the lease. Land leases have remaining lease terms that range from 41 to 44 years and some which specify that the end of the lease term is at the discretion of the lessee. We do not have lease arrangements with related parties. Accounting Policy The Company determines whether a contractual arrangement is or contains a lease at inception. Leases that are operating in nature are recognized in operating lease right-of-use assets, current lease liabilities and non-current lease liabilities on our consolidated condensed balance sheets. While Gentherm is not currently party to any leases that qualify as financing leases, right-of-use assets and liabilities recognized from financing leases would be presented separately from the right-of-use assets and liabilities recognized from operating leases on our consolidated condensed balance sheet. Lease liabilities are measured initially at the present value of the sum of the future minimum rental payments at the commencement date of the lease. Lease payments that will vary in the future due to changes in facts and circumstances are excluded from the calculation of rental payments, unless those variable payments are based on an index or rate. Rental payments are discounted using an incremental borrowing rate based on the Company’s credit rating, determined on a fully collateralized loan basis from information available at commencement date, and the duration of the lease term (the “reference rate”). Judgement is used to assess the importance of risk factor inputs during the computation of the Company’s credit rating. For significant leases at foreign subsidiaries denominated in U.S. Dollars, a risk premium associated with the borrower subsidiary’s country is added to the reference rate. For significant leases at foreign subsidiaries denominated in a foreign currency, the U.S. Dollar risk free rate with a duration similar to that of the lease term is subtracted from the reference rate and a corresponding foreign currency risk free rate with a duration similar to that of the lease term is added to the reference rate. Judgement is used to determine whether foreign subsidiary leases are significant. Operating lease right-of-use assets are measured at the amount of the lease liability, adjusted for prepaid or accrued lease payments, lease incentive received, and initial direct costs incurred, as applicable. Periods covered by an option to extend the lease are initially included in the measurement of an operating lease right-of-use asset and lease liability only when it is reasonably certain we will exercise the option. Gentherm’s lease agreements do not contain residual value guarantees or impose restrictions or covenants on the Company. For all classes of underlying assets, the Company accounts for leases that contain separate lease and nonlease components as containing a single lease component. The Company does not recognize lease right-of-use assets and lease liabilities from leases with an original lease term of 12 months or less and, instead, recognizes rent payments on a straight-line basis over the lease term in the Company’s consolidated condensed statements of income (loss). See Note 2 to our consolidated condensed financial statements for description of the impacts that resulted from the adoption of a new lease standard. Components of lease expense for the nine months ended September 30, 2019 are as follows: Lease cost: Operating lease cost $ 4,477 Short-term lease cost 2,678 Sublease income (91 ) Total lease cost $ 7,064 Weighted-average remaining lease term and discount rate is as follows: Weighted Average Remaining Lease Term: Operating leases 4.6 Weighted Average Discount Rate: Operating leases 5.45 % Other information: Supplemental Cash Flow Information: Gain on sale and leaseback transactions, net $ 207 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,539 Right-of-use lease assets obtained in exchange for lease obligations: Operating leases $ 3,339 A summary of operating leases as of September 30, 2019, under all non-cancellable operating leases with terms exceeding one year is as follows: 2019 (excluding the nine months ended September 30, 2019) $ 1,393 2020 4,570 2021 2,674 2022 1,550 2023 790 2024 or later 2,600 Total future minimum lease payments $ 13,577 Less imputed interest (1,703 ) Total $ 11,874

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited consolidated condensed financial statements included herein have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to those rules and regulations. The information furnished in the consolidated condensed financial statements include all adjustments (consisting of only normal, recurring adjustments), considered necessary to present fairly the results of operations, financial position and cash flows of the Company. These financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2018. The operating results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. Certain amounts in the prior period’s financial statements have been reclassified to conform with the current period presentation. Notably, $2,565 and $7,883 in customer relationship amortization was reclassified from product revenues to selling, general and administrative expenses for the three and nine months ended September 30, 2018, respectively. In preparing these financial statements, management was required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. These estimates and assumptions are based on our historical experience, the terms of existing contracts, our evaluation of trends in the industry, information provided by our customers and suppliers and information available from other outside sources, as appropriate. However, these estimates and assumptions are subject to an inherent degree of uncertainty. As a result, actual results in these areas may differ significantly from our estimates.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements Leases In February 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standard Update (“ASU”) 2016-02, “Leases (Topic 842)” (as amended, “ASU 2016-02”). ASU 2016-02 requires lessees to recognize a lease liability and a right-of-use asset on the balance sheet for all leases, except for short-term leases with terms of twelve months or less. The lease liability represents the lessee’s obligation to make lease payments arising from a lease, and is measured as the present value of the lease payments. The right-of-use asset represents the lessee’s right to use a specified asset for the lease term, and is measured at the lease liability amount, adjusted for lease prepayment, lease incentives received and the lessee’s initial direct costs. Leases are to be classified as finance or operating leases, with classification affecting the pattern and classification of expense recognition in the statement of income (loss). The Company adopted ASU 2016-02 on January 1, 2019, by applying the modified retrospective method and recognized a cumulative-effect adjustment to the opening balance in retained earnings. Financial information has not been updated and disclosure under the new standard have not been provided to dates and periods before January 1, 2019 ASU 2016-02 did not have an impact on our consolidated condensed statements of income for the three and nine months ended September 30, 2019 , but had a significant impact on our consolidated condensed balance sheet as of September 30, 2019 . The cumulative effects of the changes made to the Company’s consolidated condensed balance sheet as of January 1, 2019 for the adoption of ASU 2016-02 were as follows: Balance as of December 31, 2018 Adjustments due to adoption of ASU 2016-02 Balance as of January 1, 2019 Prepaid expenses and other assets 54,271 (74 ) 54,197 Assets held for sale 69,699 4,127 73,826 Operating lease right-of-use assets — 13,019 13,019 Liabilities held for sale 13,062 4,136 17,198 Deferred tax liabilities 1,177 114 1,291 Non-current lease liabilities — 12,561 12,561 Accumulated earnings 363,965 261 364,226 The Company elected the package of practical expedients provided in ASU 2016-02, which permits a lessee to not reassess under the new standard its prior conclusions about lease identification, lease classification and initial direct costs. Gentherm elected the use-of-hindsight to determine whether lease terms included periods covered by the lessee’s option to extend or terminate a lease, whether to purchase the underlying asset at the end of the lease agreement, and in assessing impairment of operating lease right-of-use assets. Finally, Gentherm elected to not assess whether existing or expired land easements that were not previously accounted for as leases are or contain a lease. Land easements previously accounted for as leases were not eligible for this practical expedient.
Recently Issued Accounting Pronouncements Not Yet Adopted	Recently Issued Accounting Pronouncements Not Yet Adopted Expected Credit Losses In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments in this update is permitted. We are currently in the process of determining the impact the implementation of ASU 2016-13 will have on the Company’s financial statements and note disclosures. Cloud Computing Arrangements That Are Service Contracts In August 2018, the FASB issued ASU 2018-15, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” ASU 2018-15 requires implementation costs incurred by customers in cloud computing arrangements to be deferred and recognized over the term of the arrangement if those costs would be capitalized by the customer in a software licensing arrangement under the internal-use software guidance. ASU 2018-15 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments in this update is permitted. We are currently in the process of determining the impact the implementation of ASU 2018-15 will have on the Company’s financial statements and note disclosures. Retirement Benefits In August 2018, the FASB issued ASU 2018-14, “Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans.” ASU 2018-14 removes certain disclosure requirements, including (i) the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year, and (ii) the amount and timing of plan assets expected to be returned to the employer. ASU 2018-14 also adds new disclosure requirements, including (i) the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates and (ii) an explanation of the reasons for significant gains and losses related to changes in the benefit obligation for the period. ASU 2018-14 is effective for annual periods ending after December 15, 2020. Early adoption of the amendments in this update is permitted. We are currently in the process of determining the impact the implementation of ASU 2018-14 will have on the Company’s financial statement note disclosures. Fair Value Measurement In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement.” ASU 2018-13 removes certain disclosure requirements, including (i) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, (ii) the policy for timing of transfer between levels, and (iii) the valuation processes for Level 3 fair value measurements. ASU 2018-13 also adds new disclosure requirements, including (i) the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and (ii) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. ASU 2018-13 is effective for annual and interim periods beginning after December 15, 2019. Early adoption of disclosures that are removed is permitted, but adoption is delayed for the new additional disclosures until their effective date. We are currently in the process of determining the impact the implementation of ASU 2018-13 will have on the Company’s financial statement note disclosures.

New Accounting Pronouncements_2

New Accounting Pronouncements (Tables)	9 Months Ended
	Sep. 30, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Summary of Cumulative Effects of Changes in Consolidated Condensed Balance Sheet for Adoption of ASU 2016-02	The cumulative effects of the changes made to the Company’s consolidated condensed balance sheet as of January 1, 2019 for the adoption of ASU 2016-02 were as follows: Balance as of December 31, 2018 Adjustments due to adoption of ASU 2016-02 Balance as of January 1, 2019 Prepaid expenses and other assets 54,271 (74 ) 54,197 Assets held for sale 69,699 4,127 73,826 Operating lease right-of-use assets — 13,019 13,019 Liabilities held for sale 13,062 4,136 17,198 Deferred tax liabilities 1,177 114 1,291 Non-current lease liabilities — 12,561 12,561 Accumulated earnings 363,965 261 364,226

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Summary of Preliminary Allocation	The preliminary purchase price and related allocation to the acquired net assets of Stihler, based on their estimated fair values as of the acquisition date, are shown below: Purchase price, cash consideration, net of cash acquired $ 14,823 Purchase price, fair value of contingent consideration 653 Total purchase price, net of cash acquired 15,476 Accounts receivable $ 883 Inventory 1,698 Prepaid expenses and other assets 241 Operating lease right-of-use assets 263 Property and equipment 260 Other intangible assets 4,380 Goodwill 9,816 Assumed liabilities (2,065 ) Net assets acquired $ 15,476

Assets and Liabilities Held f_2

Assets and Liabilities Held for Sale (Tables)	9 Months Ended
	Sep. 30, 2019
Discontinued Operations And Disposal Groups [Abstract]
Summary of Assets and Liabilities of GPT Disposal Group Classified as Held for Sale	The assets and liabilities of the GPT disposal group classified as held for sale as of September 30, 2019 are as follows: Cash $ 1,422 Accounts receivable, net 2,238 Inventory, net 4,936 Prepaid expenses and other assets 215 Operating lease right-of-use assets 3,926 Investment — Property and equipment, net 7,356 Other intangible assets, net 1,033 Deferred income tax assets 4,371 Impairment loss (18,910 ) Total assets held for sale $ 6,587 Accounts payable 420 Accrued liabilities 2,238 Operating lease liabilities 3,929 Total liabilities held for sale $ 6,587

Restructuring (Tables)

Restructuring (Tables)	9 Months Ended
	Sep. 30, 2019
Restructuring And Related Activities [Abstract]
Summary of Restructuring Activity by Reportable Segment	The following table summarizes restructuring activity for the three and nine months ended September 30, 2019 and 2018 by reporting segment: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Automotive $ 7,820 $ 2,919 $ 9,016 $ 4,038 Industrial 88 1,486 1,689 5,320 Reconciling Items 756 1,413 1,104 3,540 Total $ 8,664 $ 5,818 $ 11,809 $ 12,898
Summary of Restructuring Activity	The following table summarizes restructuring activity for the nine months ended September 30, 2019: Employee Separation Costs Accelerated Depreciation and Asset Impairment Charges Other related costs Total Balance at December 31, 2018 $ 2,079 $ — $ 468 $ 2,547 Additions, charged to restructuring expenses 8,177 2,037 1,595 11,809 Cash payments (4,069 ) — (1,458 ) (5,527 ) Non-cash utilization — (2,037 ) — (2,037 ) Reclassification to lease liability — — (193 ) (193 ) Balance at September 30, 2019 $ 6,187 $ — $ 412 $ 6,599

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Basic and Diluted Shares of Consolidated Condensed Statements of Income	The following summarizes the Common Stock included in the basic and diluted shares, as disclosed on the face of the consolidated condensed statements of income: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Weighted average number of shares for calculation of basic EPS 32,838,636 36,103,520 33,282,584 36,364,380 Stock options, restricted stock awards and restricted stock units under equity incentive plans 94,043 344,642 135,971 105,379 Weighted average number of shares for calculation of diluted EPS 32,932,679 36,448,162 33,418,555 36,469,759
Common Stock Issuable upon Exercise of Certain Stock Options	The following table represents Common Stock issuable upon the exercise of certain stock options that have been excluded from the diluted earnings calculation because the effect of their inclusion would be anti-dilutive. Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Stock options outstanding for equity incentive plans 441,435 12,000 441,435 1,359,250

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss)	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 months ended September 30, 2019 and 2018. With the exception of goodwill, asset information by segment is not reported since the Company does not manage assets at a segment level. Three Months Ended September 30, Automotive Industrial (1) Reconciling Items Consolidated Total 2019: Product revenues $ 228,243 $ 11,813 $ — $ 240,056 Depreciation and amortization 10,170 480 414 11,064 Operating income (loss) 36,629 (3,496 ) (12,804 ) 20,329 2018: Product revenues (1) $ 238,849 $ 22,655 $ — $ 261,504 Depreciation and amortization 11,060 1,170 668 12,898 Operating income (loss) 37,908 (4,335 ) (17,860 ) 15,713 Nine Months Ended September 30, Automotive Industrial (1) Reconciling Items Consolidated Total 2019: Product revenues $ 700,300 $ 41,003 $ — $ 741,303 Depreciation and amortization 30,660 1,319 1,302 33,281 Operating income (loss) 114,456 (12,131 ) (40,094 ) 62,231 2018: Product revenues (1) $ 724,420 $ 68,070 $ — $ 792,490 Depreciation and amortization 32,839 3,822 2,060 $ 38,721 Operating income (loss) 116,312 (18,896 ) (45,461 ) 51,955 (1) Industrial segment includes $3,418 and $30,460 in product revenues, $0 and $1,894 in depreciation and amortization, and $206 and $659 in operating income from CSZ-IC for the nine months ended September 30, 2019 and 2018, respectively.
Segment Information About Reported Segment Product Revenues by Product Category	Automotive and Industrial segment product revenues by product category for the three and nine months ended September 30, 2019 and 2018 are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Climate Control Seats (CCS) $ 88,133 $ 97,578 $ 270,924 $ 276,191 Seat Heaters 71,030 70,768 218,578 235,164 Steering Wheel Heaters 16,621 18,095 49,620 53,192 Automotive Cables 20,361 24,961 66,316 77,471 Battery Thermal Management (BTM) (a) 11,890 7,461 31,531 18,863 Electronics 11,729 12,590 36,035 44,409 Other Automotive 8,479 7,396 27,296 19,130 Subtotal Automotive $ 228,243 $ 238,849 $ 700,300 $ 724,420 Remote Power Generation (GPT) 3,477 4,378 11,181 14,310 Industrial Chambers — 9,829 3,418 30,460 Gentherm Medical 8,336 8,448 26,404 23,300 Subtotal Industrial $ 11,813 $ 22,655 $ 41,003 $ 68,070 Total Company $ 240,056 $ 261,504 $ 741,303 $ 792,490 a) Battery Thermal Management or BTM product revenues include Gentherm’s automotive grade, low cost, heat resistant fans and blowers used by customer for battery cooling through ventilation and production level shipments of the advanced TED based active cool system.
Product Revenues Information by Geographic Area	Total product revenues information by geographic area is as follows (based on shipment destination): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 United States $ 111,570 $ 125,936 $ 340,656 $ 369,798 Germany 20,379 22,681 63,889 68,670 Japan 20,508 16,672 59,102 43,520 China 17,591 22,756 49,598 71,887 South Korea 14,543 12,814 45,098 42,419 Czech Republic 8,805 10,742 30,956 33,563 Canada 8,833 7,778 29,226 33,482 United Kingdom 8,315 9,037 23,980 28,349 Other 29,512 33,088 98,798 100,802 Total Non-U.S. $ 128,486 $ 135,568 $ 400,647 $ 422,692 $ 240,056 $ 261,504 $ 741,303 $ 792,490

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue Recognition And Deferred Revenue [Abstract]
Schedule of Changes in Unearned Revenue	Changes in unearned revenue were as follows: Nine Months Ended September 30, 2019 Balance, beginning of period $ 1,597 Additions to unearned revenue 549 Reclassified to revenue (1,211 ) Reclassified to held for sale (168 ) Currency impacts (20 ) Balance, end of period $ 747

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Summary of Provision for Income Taxes and Corresponding Effective Tax Rate	A summary of the provision for income taxes and the corresponding effective tax rate for the three and nine months ended September 30, 2019 and September 30, 2018, is shown below (in thousands, except effective tax rates): Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Income tax expense $ 6,771 $ 3,688 $ 19,214 $ 9,807 Earnings before income tax $ 22,658 $ 3,333 $ 46,266 $ 39,077 Effective tax rate 29.9 % 110.7 % 41.5 % 25.1 % Income tax expense excluding impairment loss $ 6,771 $ 3,688 $ 19,214 $ 9,807 Earnings before income tax excluding impairment loss $ 23,495 $ 14,809 $ 67,472 $ 50,553 Effective tax rate excluding impairment loss 28.8 % 24.9 % 28.5 % 19.4 %

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Changes in the Carrying Amount of Goodwill, By Operating Segment	A summary of changes in the carrying amount of goodwill, by operating segment, for the nine months ended September 30, 2019 is as follows: Nine Months Ended September 30, 2019 Automotive Industrial Total Balance, beginning of period $ 37,533 $ 17,778 $ 55,311 Stihler acquisition — 9,816 9,816 Currency impact (1,388 ) (238 ) (1,626 ) Balance, end of period $ 36,145 $ 27,356 $ 63,501

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Summary of Company's Debt	The following table summarizes the Company’s debt as of September 30, 2019 and December 31, 2018: September 30, 2019 December 31, 2018 Interest Rate Principal Balance Principal Balance Amended Credit Agreement: U.S. Revolving Note (U.S. Dollar Denominations) 3.29% $ 70,000 $ 122,000 U.S. Revolving Note (Euro Denominations) 1.25% 19,623 5,727 DEG China Loan — — 913 DEG Vietnam Loan 5.21% 10,000 11,250 Total debt 99,623 139,890 Current portion (2,500 ) (3,413 ) Long-term debt, less current maturities $ 97,123 $ 136,477
Principal Maturities of Debt	The scheduled principal maturities of our debt as of September 30, 2019 are as follows: Year U.S. Revolving Note DEG Vietnam Note Total Remainder of 2019 $ — $ 1,250 $ 1,250 2020 — 2,500 2,500 2021 — 2,500 2,500 2022 — 2,500 2,500 2023 — 1,250 1,250 2024 89,623 — 89,623 Total $ 89,623 $ 10,000 $ 99,623

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Reconciliation of Cash and Cash Equivalents and Restricted Cash	A reconciliation of cash and cash equivalents on the consolidated condensed balance sheets to cash, cash equivalents and restricted cash presented on the consolidated condensed statements of cash flows is as follows: September 30, 2019 December 31, 2018 September 30, 2018 December 31, 2017 Cash and cash equivalents presented in the consolidated condensed balance sheets $ 45,200 $ 39,620 $ 47,152 $ 103,172 Restricted cash 2,504 — — — Cash, cash equivalents and restricted cash presented in the consolidated condensed statements of cash flows $ 47,704 $ 39,620 $ 47,152 $ 103,172
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, 2019 is as follows: Asset Derivatives Liability Derivatives Hedge Designation Fair Value Hierarchy Balance Sheet Location Fair Value Balance Sheet Location Fair Value Net Asset/ (Liabilities) Foreign currency derivatives Cash flow hedge Level 2 Current assets $ 897 Current liabilities $ — $ 897
Information Related to Effect of Derivative Instruments on Our Consolidated Condensed Statements of Income	Information relating to the effect of derivative instruments on our consolidated condensed statements of income is as follows: Location Three Months Ended September 30, 2019 Three Months Ended September 30, 2018 Nine Months Ended September 30, 2019 Nine Months Ended September 30, 2018 Foreign currency derivatives Cost of sales $ 328 $ 391 $ 1,003 $ (214 ) Selling, general and administrative — — — 75 Other comprehensive income (257 ) 1,753 806 2,304 Foreign currency gain (loss) 18 11 (51 ) 58 Total foreign currency derivatives $ 89 $ 2,155 $ 1,758 $ 2,223 Commodity derivatives Cost of sales $ — $ — $ — $ 145 Other comprehensive income — — — $ (218 ) Total commodity derivatives $ — $ — $ — $ (73 )

Reclassifications Out of Accu_2

Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Schedule of Reclassification Adjustments and Other Activities Impacting Accumulated Other Comprehensive Income (Loss)	Reclassification adjustments and other activities impacting accumulated other comprehensive income (loss) during the three and nine months ended September 30, 2019 and 2018 are as follows: Defined Benefit Pension Plans Foreign Currency Translation Adjustments Foreign Currency Hedge Derivatives Total Balance at June 30, 2019 $ (2,339 ) $ (37,928 ) $ 827 $ (39,440 ) Other comprehensive income (loss) before reclassifications — (14,857 ) 167 (14,690 ) Income tax effect of other comprehensive income (loss) before reclassifications — (315 ) (36 ) (351 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — (424 ) a (424 ) Income taxes reclassified into net income (loss) — — 91 91 Net current period other comprehensive income (loss) — (15,172 ) (202 ) (15,374 ) Balance at September 30, 2019 $ (2,339 ) $ (53,100 ) $ 625 $ (54,814 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales. Defined Benefit Pension Plans Foreign Currency Translation Adjustments Foreign Currency Hedge Derivatives Total Balance at June 30, 2018 $ (2,406 ) $ (29,040 ) $ (397 ) $ (31,843 ) Other comprehensive income (loss) before reclassifications — (3,266 ) 1,586 (1,680 ) Income tax effect of other comprehensive income (loss) before reclassifications — 15 (491 ) (476 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — 167 a 167 Income taxes reclassified into net income (loss) — — (45 ) (45 ) Net current period other comprehensive income (loss) — (3,251 ) 1,217 (2,034 ) Balance at September 30, 2018 $ (2,406 ) $ (32,291 ) $ 820 $ (33,877 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales. Defined Benefit Pension Plans Foreign Currency Translation Adjustments Foreign Currency Hedge Derivatives Total Balance at December 31, 2018 $ (2,339 ) $ (37,157 ) $ (4 ) $ (39,500 ) Other comprehensive income (loss) before reclassifications — (15,454 ) 1,359 (14,095 ) Income tax effect of other comprehensive income (loss) before reclassifications — (489 ) (296 ) (785 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — (553 ) a (553 ) Income taxes reclassified into net income (loss) — — 119 119 Net current period other comprehensive income (loss) — (15,943 ) 629 (15,314 ) Balance at September 30, 2019 $ (2,339 ) $ (53,100 ) $ 625 $ (54,814 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales. Defined Benefit Pension Plans Foreign Currency Translation Adjustments Commodity Hedge Derivatives Foreign Currency Hedge Derivatives Total Balance at December 31, 2017 $ (2,366 ) $ (17,555 ) $ 277 $ (800 ) $ (20,444 ) Cumulative effect of accounting change due to adoption of ASU 2018-02 (40 ) — — — (40 ) Other comprehensive income (loss) before reclassifications — (14,519 ) — 2,048 (12,471 ) Income tax effect of other comprehensive income (loss) before reclassifications — (217 ) — (615 ) (832 ) Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss) — — (218 ) a 256 a 38 Income taxes reclassified into net income (loss) — — (59 ) (69 ) (128 ) Net current period other comprehensive income (loss) (40 ) (14,736 ) (277 ) 1,620 (13,433 ) Balance at September 30, 2018 $ (2,406 ) $ (32,291 ) $ — $ 820 $ (33,877 ) (a) The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Components of Lease Expense, Weighted-Average Remaining Lease Term and Discount Rate and Other Information	Components of lease expense for the nine months ended September 30, 2019 are as follows: Lease cost: Operating lease cost $ 4,477 Short-term lease cost 2,678 Sublease income (91 ) Total lease cost $ 7,064 Weighted-average remaining lease term and discount rate is as follows: Weighted Average Remaining Lease Term: Operating leases 4.6 Weighted Average Discount Rate: Operating leases 5.45 % Other information: Supplemental Cash Flow Information: Gain on sale and leaseback transactions, net $ 207 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,539 Right-of-use lease assets obtained in exchange for lease obligations: Operating leases $ 3,339
Summary of Operating Leases Under all Non-Cancellable Operating Leases	A summary of operating leases as of September 30, 2019, under all non-cancellable operating leases with terms exceeding one year is as follows: 2019 (excluding the nine months ended September 30, 2019) $ 1,393 2020 4,570 2021 2,674 2022 1,550 2023 790 2024 or later 2,600 Total future minimum lease payments $ 13,577 Less imputed interest (1,703 ) Total $ 11,874

Overview - Additional Informati

Overview - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Customer Relationship
Basis Of Presentation And Accounting Policies [Line Items]
Amortization of intangible assets	$ 2,565	$ 7,883

New Accounting Pronouncements -

New Accounting Pronouncements - Summary of Cumulative Effects of Changes in Consolidated Condensed Balance Sheet for Adoption of ASU 2016-02 (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Prepaid expenses and other assets	$ 39,884		$ 54,271
Assets held for sale	6,742		69,699
Operating lease right-of-use assets	12,136
Liabilities held for sale	6,742		13,062
Deferred tax liabilities	1,142		1,177
Non-current lease liabilities	7,391
Accumulated earnings	$ 391,278		$ 363,965
ASU 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Prepaid expenses and other assets		$ 54,197
Assets held for sale		73,826
Operating lease right-of-use assets		13,019
Liabilities held for sale		17,198
Deferred tax liabilities		1,291
Non-current lease liabilities		12,561
Accumulated earnings		364,226
Adjustments Due to Adoption of ASU 2016-02 | ASU 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Prepaid expenses and other assets		(74)
Assets held for sale		4,127
Operating lease right-of-use assets		13,019
Liabilities held for sale		4,136
Deferred tax liabilities		114
Non-current lease liabilities		12,561
Accumulated earnings		$ 261

Acquisitions and Divestitures -

Acquisitions and Divestitures - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 01, 2019	Feb. 01, 2019	Sep. 30, 2019	Sep. 30, 2019
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale of business				$ 4,970
CSZ-IC
Business Acquisition [Line Items]
Total cash proceeds		$ 47,500
Escrow deposit		$ 2,500
Pre-tax gain (loss) on sale of business				4,970
Stihler Electronic GmbH
Business Acquisition [Line Items]
Net assets acquired	$ 15,476
Business combination future contingent consideration milestone payment	653
Acquisition related costs			$ 19	$ 399
Estimated goodwill, expected tax deductible amount	$ 2,524
Stihler Electronic GmbH | Other intangible assets
Business Acquisition [Line Items]
Estimated useful life	9 years

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Summary of Preliminary Allocation (Detail) - USD ($) $ in Thousands	Apr. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Purchase price, cash consideration, net of cash acquired		$ 14,823	$ 15
Goodwill		$ 63,501		$ 55,311
Stihler Electronic GmbH
Business Acquisition [Line Items]
Purchase price, cash consideration, net of cash acquired	$ 14,823
Business combination future contingent consideration milestone payment	653
Total purchase price, net of cash acquired	15,476
Accounts receivable	883
Inventory	1,698
Prepaid expenses and other assets	241
Operating lease right-of-use assets	263
Property and equipment	260
Other intangible assets	4,380
Goodwill	9,816
Assumed liabilities	(2,065)
Net assets acquired	$ 15,476

Assets and Liabilities Held f_3

Assets and Liabilities Held for Sale - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on sale of business				$ (4,970)
Foreign currency translation adjustments gain (loss)		$ 14,857	$ 3,266	15,454	$ 14,519
GPT
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment loss recognized on assets held for sale		18,910		18,910		$ 2,190
Impairment loss on equity investment		0		4,486
Impairment losses on asset held for sale		$ 837		$ 16,720
GPT | Scenario Forecast
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on sale of business	$ 6,000
Foreign currency translation adjustments gain (loss)	$ 4,000

Assets and Liabilities Held f_4

Assets and Liabilities Held for Sale - Summary of Assets and Liabilities of GPT Disposal Group Classified as Held for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Total assets held for sale	$ 6,742	$ 69,699
Total liabilities held for sale	6,742	13,062
GPT
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Cash	1,422
Accounts receivable, net	2,238
Inventory, net	4,936
Prepaid expenses and other assets	215
Operating lease right-of-use assets	3,926
Property and equipment, net	7,356
Other intangible assets, net	1,033
Deferred income tax assets	4,371
Impairment loss	(18,910)	$ (2,190)
Total assets held for sale	6,587
Accounts payable	420
Accrued liabilities	2,238
Operating lease liabilities	3,929
Total liabilities held for sale	$ 6,587

Restructuring - Additional Info

Restructuring - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)Facility	Sep. 30, 2018USD ($)
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 8,664,000	$ 5,818,000	$ 11,809,000	$ 12,898,000
Impairment loss	837,000	11,476,000	21,206,000	11,476,000
Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	20,000,000		20,000,000
Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	24,000,000		24,000,000
Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			4,669,000
Impairment loss	0		425,000
GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			2,173,000
Employee Separation Costs
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		3,303,000	8,177,000	5,040,000
Employee Separation Costs | Manufacturing Footprint Rationalization
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	5,200,000
Restructuring reserve accelerated depreciation and fixed asset impairment	1,612,000
Employee Separation Costs | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	9,000,000		9,000,000
Employee Separation Costs | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	11,000,000		11,000,000
Employee Separation Costs | Other Restructuring Activities
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	1,467,000		2,726,000
Employee Separation Costs | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		157,000		1,038,000
Employee Separation Costs | GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	0	262,000	251,000	472,000
Cash Expenditures | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	17,000,000		17,000,000
Cash Expenditures | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	21,000,000		21,000,000
Restructuring Capital Expenditures | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	4,500,000		4,500,000
Restructuring Capital Expenditures | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	5,500,000		5,500,000
Accelerated Depreciation and Impairment
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			2,037,000
Accelerated Depreciation and Impairment | Manufacturing Footprint Rationalization
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	3,000,000		3,000,000
Other Restructuring
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			1,595,000
Other Restructuring | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	3,500,000		3,500,000
Other Restructuring | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	4,500,000		4,500,000
Other Restructuring | Other Restructuring Activities
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	385,000		734,000
Other Restructuring | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		589,000		1,024,000
Other Restructuring | GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 0	125,000	$ 861,000	125,000
Consultant Costs
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		1,332,000		2,831,000
Loss on the Sale of Battery Management Systems | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		1,107,000		1,107,000
Asset Disposal Costs | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		$ 50,000		$ 1,250,000
Facility Closing | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Number of leased facilities vacated | Facility			2

Restructuring - Summary of Rest

Restructuring - Summary of Restructuring Activity by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 8,664	$ 5,818	$ 11,809	$ 12,898
Operating Segments | Automotive Segments
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	7,820	2,919	9,016	4,038
Operating Segments | Industrial Segments
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	88	1,486	1,689	5,320
Reconciling Items
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 756	$ 1,413	$ 1,104	$ 3,540

Restructuring - Summary of Re_2

Restructuring - Summary of Restructuring Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period			$ 2,547
Additions, charged to restructuring expenses	$ 8,664	$ 5,818	11,809	$ 12,898
Cash payments			(5,527)
Non-cash utilization			(2,037)
Reclassification to lease liability			(193)
Balance, end of period	6,599		6,599
Employee Separation Costs
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period			2,079
Additions, charged to restructuring expenses		$ 3,303	8,177	$ 5,040
Cash payments			(4,069)
Balance, end of period	6,187		6,187
Accelerated Depreciation and Impairment
Restructuring Cost And Reserve [Line Items]
Additions, charged to restructuring expenses			2,037
Non-cash utilization			(2,037)
Other Restructuring
Restructuring Cost And Reserve [Line Items]
Balance, beginning of period			468
Additions, charged to restructuring expenses			1,595
Cash payments			(1,458)
Reclassification to lease liability			(193)
Balance, end of period	$ 412		$ 412

Earnings Per Share (Detail)

Earnings Per Share (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Weighted average number of shares for calculation of basic EPS	32,838,636	36,103,520	33,282,584	36,364,380
Stock options, restricted stock awards and restricted stock units under equity incentive plans	94,043	344,642	135,971	105,379
Weighted average number of shares for calculation of diluted EPS	32,932,679	36,448,162	33,418,555	36,469,759
Stock options under equity incentive plans
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Stock options outstanding for equity incentive plans	441,435	12,000	441,435	1,359,250

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 240,056	$ 261,504	$ 741,303	$ 792,490
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 11,064	$ 12,898	$ 33,281	$ 38,721
Operating income (loss)	20,329	15,713	62,231	51,955
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	228,243	238,849	700,300	724,420
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	11,813	22,655	41,003	68,070
Operating Segments | Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	$ 228,243	$ 238,849	$ 700,300	$ 724,420
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 10,170	$ 11,060	$ 30,660	$ 32,839
Operating income (loss)	36,629	37,908	114,456	116,312
Operating Segments | Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	$ 11,813	$ 22,655	$ 41,003	$ 68,070
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 480	$ 1,170	$ 1,319	$ 3,822
Operating income (loss)	$ (3,496)	$ (4,335)	$ (12,131)	$ (18,896)
Reconciling Items
Segment Reporting Information [Line Items]
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Depreciation and amortization	$ 414	$ 668	$ 1,302	$ 2,060
Operating income (loss)	$ (12,804)	$ (17,860)	$ (40,094)	$ (45,461)

Segment Information about Rep_2

Segment Information about Reported Product Revenues, Depreciation and Amortization and Operating Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 240,056	$ 261,504	$ 741,303	$ 792,490
Depreciation and amortization	11,064	12,898	33,281	38,721
Operating income	20,329	15,713	62,231	51,955
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	$ 11,813	$ 22,655	41,003	68,070
Industrial Segments | CSZ-IC
Segment Reporting Information [Line Items]
Product revenues			3,418	30,460
Depreciation and amortization			0	1,894
Operating income			$ 206	$ 659

Segment Information About Rep_3

Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 240,056	$ 261,504	$ 741,303	$ 792,490
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	228,243	238,849	700,300	724,420
Automotive Segments | Climate Control Seat (CCS)
Segment Reporting Information [Line Items]
Product revenues	88,133	97,578	270,924	276,191
Automotive Segments | Seat Heaters
Segment Reporting Information [Line Items]
Product revenues	71,030	70,768	218,578	235,164
Automotive Segments | Steering Wheel Heaters
Segment Reporting Information [Line Items]
Product revenues	16,621	18,095	49,620	53,192
Automotive Segments | Automotive Cables
Segment Reporting Information [Line Items]
Product revenues	20,361	24,961	66,316	77,471
Automotive Segments | Battery Thermal Management (BTM)
Segment Reporting Information [Line Items]
Product revenues	11,890	7,461	31,531	18,863
Automotive Segments | Electronics
Segment Reporting Information [Line Items]
Product revenues	11,729	12,590	36,035	44,409
Automotive Segments | Other Automotive
Segment Reporting Information [Line Items]
Product revenues	8,479	7,396	27,296	19,130
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	11,813	22,655	41,003	68,070
Industrial Segments | Remote Power Generation
Segment Reporting Information [Line Items]
Product revenues	3,477	4,378	11,181	14,310
Industrial Segments | Industrial Chambers
Segment Reporting Information [Line Items]
Product revenues		9,829	3,418	30,460
Industrial Segments | Gentherm Medical
Segment Reporting Information [Line Items]
Product revenues	$ 8,336	$ 8,448	$ 26,404	$ 23,300

Segment Reporting (Detail)

Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Product revenues	$ 240,056	$ 261,504	$ 741,303	$ 792,490
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
United States
Segment Reporting Information [Line Items]
Product revenues	$ 111,570	$ 125,936	$ 340,656	$ 369,798
Germany
Segment Reporting Information [Line Items]
Product revenues	20,379	22,681	63,889	68,670
Japan
Segment Reporting Information [Line Items]
Product revenues	20,508	16,672	59,102	43,520
China
Segment Reporting Information [Line Items]
Product revenues	17,591	22,756	49,598	71,887
South Korea
Segment Reporting Information [Line Items]
Product revenues	14,543	12,814	45,098	42,419
Czech Republic
Segment Reporting Information [Line Items]
Product revenues	8,805	10,742	30,956	33,563
Canada
Segment Reporting Information [Line Items]
Product revenues	8,833	7,778	29,226	33,482
United Kingdom
Segment Reporting Information [Line Items]
Product revenues	8,315	9,037	23,980	28,349
Other
Segment Reporting Information [Line Items]
Product revenues	29,512	33,088	98,798	100,802
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 128,486	$ 135,568	$ 400,647	$ 422,692

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]
Aggregate amount of transaction price allocated to material rights that remain unsatisfied	$ 747
Revenue expected to be recognized in next 3 months	42.00%
Revenue expected to be recognized in 2020	33.00%
Revenue expected to be recognized in 2021	9.00%
Revenue expected to be recognized in 2022	9.00%
Revenue expected to be recognized in 2023	7.00%
Unearned revenue	$ 747	$ 1,597
Automotive Segments
Deferred Revenue Arrangement [Line Items]
Unearned revenue	$ 747	$ 1,597

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information (Details 1)	Sep. 30, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Deferred Revenue Arrangement [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year

Changes in Unearned Revenue (De

Changes in Unearned Revenue (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Revenue Recognition And Deferred Revenue [Abstract]
Beginning balance	$ 1,597
Additions to unearned revenue	549
Reclassified to revenue	(1,211)
Reclassified to held for sale	(168)
Currency impacts	(20)
Ending balance	$ 747

Income Taxes - Summary of Provi

Income Taxes - Summary of Provision for Income Taxes and Corresponding Effective Tax Rate (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense	$ 6,771	$ 3,688	$ 19,214	$ 9,807
Earnings before income tax	$ 22,658	$ 3,333	$ 46,266	$ 39,077
Effective tax rate	29.90%	110.70%	41.50%	25.10%
Income tax expense excluding impairment loss	$ 6,771	$ 3,688	$ 19,214	$ 9,807
Earnings before income tax excluding impairment loss	$ 23,495	$ 14,809	$ 67,472	$ 50,553
Effective tax rate excluding impairment loss	28.80%	24.90%	28.50%	19.40%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Impairment loss	$ 837	$ 11,476	$ 21,206	$ 11,476

Goodwill - Summary of Changes i

Goodwill - Summary of Changes in the Carrying Amount of Goodwill, By Operating Segment (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Goodwill [Line Items]
Balance, beginning of period	$ 55,311
Balance, end of period	63,501
Operating Segments
Goodwill [Line Items]
Balance, beginning of period	55,311
Stihler acquisition	9,816
Currency impact	(1,626)
Balance, end of period	63,501
Automotive Segments | Operating Segments
Goodwill [Line Items]
Balance, beginning of period	37,533
Currency impact	(1,388)
Balance, end of period	36,145
Industrial Segments | Operating Segments
Goodwill [Line Items]
Balance, beginning of period	17,778
Stihler acquisition	9,816
Currency impact	(238)
Balance, end of period	$ 27,356

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	Jun. 27, 2019	Jun. 26, 2019	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Maximum percentage of stock of non US subsidiaries pledge to secure obligation			66.00%
Amended credit agreement, debt issuance costs			$ 1,278,000
Federal Funds Rate | Minimum
Debt Instrument [Line Items]
Interest rate			0.50%
Federal Funds Rate | Maximum
Debt Instrument [Line Items]
Interest rate			1.90%
London Interbank Offered Rate
Debt Instrument [Line Items]
Interest rate			2.02%
Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Undrawn borrowing capacity			$ 385,129,000
United State Bank Of America Credit Facility
Debt Instrument [Line Items]
Interest rate			5.00%
Euro Currency Rate Loans | Minimum
Debt Instrument [Line Items]
Interest rate			0.00%
Euro Currency Rate Loans | Minimum | Credit Agreement
Debt Instrument [Line Items]
Interest rate			1.25%
Euro Currency Rate Loans | Maximum
Debt Instrument [Line Items]
Interest rate			1.00%
Euro Currency Rate Loans | Maximum | Credit Agreement
Debt Instrument [Line Items]
Interest rate			2.25%
Base Rate Loans | Minimum | Credit Agreement
Debt Instrument [Line Items]
Interest rate			0.25%
Base Rate Loans | Maximum | Credit Agreement
Debt Instrument [Line Items]
Interest rate			1.25%
DEG Loan
Debt Instrument [Line Items]
Semi-annual principal payments earliest date			2015-03
Semi-annual principal payments latest date			2019-09
DEG Vietnam Loan
Debt Instrument [Line Items]
Semi-annual principal payments earliest date			2017-11
Semi-annual principal payments latest date			2023-05
Revolving Credit Facility | Revolving Note (U.S. Dollar)
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 475,000,000	$ 350,000,000		$ 350,000,000
Maximum borrowing capacity increase subject to specified conditions			$ 175,000,000
Debt maturity date	Jun. 27, 2024	Mar. 17, 2021

Summary of Company's Debt (Deta

Summary of Company's Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 99,623	$ 139,890
Current portion	(2,500)	(3,413)
Long-term debt, less current maturities	$ 97,123	136,477
U.S. Revolving Note (U.S. Dollar Denominations)
Debt Instrument [Line Items]
Interest Rate	3.29%
Total debt	$ 70,000	122,000
U.S. Revolving Note (Euro Denominations)
Debt Instrument [Line Items]
Interest Rate	1.25%
Total debt	$ 19,623	5,727
DEG China Loan
Debt Instrument [Line Items]
Total debt		913
DEG Vietnam Loan
Debt Instrument [Line Items]
Interest Rate	5.21%
Total debt	$ 10,000	$ 11,250

Principal Maturities of Debt (D

Principal Maturities of Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt maturing in remainder of 2019	$ 1,250
Debt maturing in 2020	2,500
Debt maturing in 2021	2,500
Debt maturing in 2022	2,500
Debt maturing in 2023	1,250
Debt maturing in 2024	89,623
Total debt	99,623	$ 139,890
US and Euro Denominated Revolving Note
Debt Instrument [Line Items]
Debt maturing in 2024	89,623
Total debt	89,623
DEG Vietnam Loan
Debt Instrument [Line Items]
Debt maturing in remainder of 2019	1,250
Debt maturing in 2020	2,500
Debt maturing in 2021	2,500
Debt maturing in 2022	2,500
Debt maturing in 2023	1,250
Total debt	$ 10,000	$ 11,250

Reconciliation of Cash and Cash

Reconciliation of Cash and Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Cash and cash equivalents presented in the consolidated condensed balance sheets	$ 45,200	$ 39,620	$ 47,152	$ 103,172
Restricted cash	2,504
Cash, cash equivalents and restricted cash presented in the consolidated condensed statements of cash flows	$ 47,704	$ 39,620	$ 47,152	$ 103,172

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Maximum length of time to hedge exposure to foreign currency exchange risk			1 year
Maximum length of time to hedge exposure to price fluctuations in material commodities			2 years
Foreign Currency Derivatives
Derivative [Line Items]
Notional Value	$ 25,210,000		$ 25,210,000		$ 33,250,000
Commodity Derivatives
Derivative [Line Items]
Notional Value	0		0		$ 0
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 - Foreign Currency Derivatives - Designated as Hedging Instrument $ in Thousands	Sep. 30, 2019USD ($)
Derivatives Fair Value [Line Items]
Net Asset/ (Liabilities)	$ 897
Current Assets
Derivatives Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 897

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 89	$ 2,155	$ 1,758	$ 2,223
Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives				(73)
Other comprehensive income | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	(257)	1,753	806	2,304
Other comprehensive income | Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives				(218)
Cost of sales | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	328	391	1,003	(214)
Cost of sales | Commodity Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives				145
Selling, general and administrative expense | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives				75
Foreign currency gain (loss) | Foreign Currency Derivatives
Derivative Instruments Gain Loss [Line Items]
Gain (loss) on derivatives	$ 18	$ 11	$ (51)	$ 58

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	$ 99,623,000	$ 139,890,000
Fair Value, Recurring Basis
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial assets, fair value	0	0
Financial liabilities, fair value	0	0
Fair Value, Nonrecurring Basis
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Financial assets, fair value	0
Financial liabilities, fair value	0
DEG Vietnam Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value	10,000,000	11,250,000
Fair value	$ 10,213,000	11,100,000
DEG China Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value		913,000
Fair value		$ 900,000

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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (39,440)	$ (31,843)	$ (39,500)	$ (20,444)
Cumulative effect of accounting change due to adoption of ASU 2018-02					(40)
Other comprehensive income (loss) before reclassifications		(14,690)	(1,680)	(14,095)	(12,471)
Income tax effect of other comprehensive income (loss) before reclassifications		(351)	(476)	(785)	(832)
Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss)		(424)	167	(553)	38
Income taxes reclassified into net income (loss)		91	(45)	119	(128)
Other comprehensive loss, net of tax		(15,374)	(2,034)	(15,314)	(13,433)
Ending Balance		(54,814)	(33,877)	(54,814)	(33,877)
Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(2,339)	(2,406)	(2,339)	(2,366)
Cumulative effect of accounting change due to adoption of ASU 2018-02					(40)
Other comprehensive loss, net of tax					(40)
Ending Balance		(2,339)	(2,406)	(2,339)	(2,406)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(37,928)	(29,040)	(37,157)	(17,555)
Other comprehensive income (loss) before reclassifications		(14,857)	(3,266)	(15,454)	(14,519)
Income tax effect of other comprehensive income (loss) before reclassifications		(315)	15	(489)	(217)
Other comprehensive loss, net of tax		(15,172)	(3,251)	(15,943)	(14,736)
Ending Balance		(53,100)	(32,291)	(53,100)	(32,291)
Foreign Currency Hedge Derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		827	(397)	(4)	(800)
Other comprehensive income (loss) before reclassifications		167	1,586	1,359	2,048
Income tax effect of other comprehensive income (loss) before reclassifications		(36)	(491)	(296)	(615)
Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss)	[1]	(424)	167	(553)	256
Income taxes reclassified into net income (loss)		91	(45)	119	(69)
Other comprehensive loss, net of tax		(202)	1,217	629	1,620
Ending Balance		$ 625	$ 820	$ 625	820
Commodity Hedge Derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance					277
Amounts reclassified from accumulated other comprehensive income (loss) into net income (loss)	[1]				(218)
Income taxes reclassified into net income (loss)					(59)
Other comprehensive loss, net of tax					$ (277)
[1]	The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

Leases - Additional Information

Leases - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019
Lessee Lease Description [Line Items]
Operating lease, description	The Company has operating leases for office, manufacturing and research and development facilities, as well as land leases for certain manufacturing facilities that are accounted for as operating leases. We also have operating leases for office equipment and automobiles.
Operating lease, existence of option to extend	true
Operating lease, options to extend	Excluding land leases, our leases have remaining lease terms ranging from less than 1 year to 7 years and may include options to extend the lease for an additional term equal to the original term of the lease.
Minimum
Lessee Lease Description [Line Items]
Operating lease, term of contract	1 year
Minimum | Ground
Lessee Lease Description [Line Items]
Operating lease, term of contract	41 years
Maximum
Lessee Lease Description [Line Items]
Operating lease, term of contract	7 years
Maximum | Ground
Lessee Lease Description [Line Items]
Operating lease, term of contract	44 years

Leases - Components of Lease Ex

Leases - Components of Lease Expense, Weighted-Average Remaining Lease Term and Discount Rate and Other Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Lease cost:
Operating lease cost	$ 4,477
Short-term lease cost	2,678
Sublease income	(91)
Total lease cost	$ 7,064
Weighted Average Remaining Lease Term, Operating leases	4 years 7 months 6 days
Weighted Average Discount Rate, Operating leases	5.45%
Gain on sale and leaseback transactions, net	$ 207
Operating cash flows from operating leases	4,539
Right-of-use lease assets obtained in exchange for lease obligations, Operating leases	$ 3,339

Leases - Summary of Operating L

Leases - Summary of Operating Leases Under all Non-Cancellable Operating Leases (Detail) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
2019 (excluding the nine months ended September 30, 2019)	$ 1,393
2020	4,570
2021	2,674
2022	1,550
2023	790
2024 or later	2,600
Total future minimum lease payments	13,577
Less imputed interest	(1,703)
Total	$ 11,874