Gentherm (THRM) 10-Q 5 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'THRM	'
Entity Registrant Name	'GENTHERM INC	'
Entity Central Index Key	'0000903129	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	34,689,569

Consolidated_Condensed_Balance

Consolidated Condensed Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current Assets:	'	'
Cash & cash equivalents	$36,003	$58,152
Accounts receivable, less allowance of $2,878 and $2,474, respectively	122,330	102,261
Inventory:	'	'
Raw Materials	35,388	28,279
Work in process	2,720	2,461
Finished goods	24,698	23,016
Inventory, net	62,806	53,756
Derivative financial instruments	292	160
Deferred income tax assets	14,389	15,006
Prepaid expenses and other assets	15,222	12,809
Total current assets	251,042	242,144
Property and equipment, net	73,608	55,010
Goodwill	25,300	24,729
Other intangible assets	85,827	95,870
Deferred financing costs	1,246	1,880
Deferred income tax assets	7,772	5,361
Derivative financial instruments	2,403	4,141
Other non-current assets	10,701	10,062
Total assets	457,899	439,197
Current Liabilities:	'	'
Accounts payable	55,176	42,508
Accrued liabilities	57,696	54,157
Current maturities of long-term debt	22,164	17,218
Derivative financial instruments	2,652	3,326
Total current liabilities	137,688	117,209
Pension benefit obligation	4,961	5,009
Other liabilities	2,836	4,540
Long-term debt, less current maturities	65,270	39,734
Derivative financial instruments	9,553	13,245
Deferred income tax liabilities	21,945	21,828
Total liabilities	242,253	201,565
Series C Convertible Preferred Stock	'	22,469
Common Stock:	'	'
No par value; 55,000,000 shares authorized, 34,689,569 and 29,818,225 issued and outstanding at September 30, 2013 and December 31, 2012, respectively	228,985	166,309
Paid-in capital	-9,076	24,120
Accumulated other comprehensive income (expense)	-9,308	-11,231
Accumulated earnings	3,854	-17,383
Total Gentherm Incorporated shareholders’ equity	214,455	161,815
Non-controlling interest	1,191	53,348
Total shareholders’ equity	215,646	215,163
Total liabilities and shareholders’ equity	$457,899	$439,197

Consolidated_Condensed_Balance1

Consolidated Condensed Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Accounts receivable, allowance	$2,878	$2,474
Common Stock, par value	'	'
Common Stock, shares authorized	55,000,000	55,000,000
Common Stock, shares issued	34,689,569	29,818,225
Common Stock, shares outstanding	34,689,569	29,818,225

Consolidated_Condensed_Stateme

Consolidated Condensed Statements of Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Product revenues	$171,182	$141,058	$479,792	$406,737
Cost of sales	125,265	104,203	354,672	303,110
Gross margin	45,917	36,855	125,120	103,627
Operating expenses:	'	'	'	'
Net research and development expenses	12,718	10,257	36,962	30,566
Acquisition transaction expenses	326	'	1,911	'
Selling, general and administrative	18,319	16,560	53,483	45,972
Total operating expenses	31,363	26,817	92,356	76,538
Operating income	14,554	10,038	32,764	27,089
Interest expense	-1,062	-898	-2,916	-3,082
Revaluation of derivatives	217	-993	1,201	-1,056
Foreign currency gain (loss)	-1,612	-421	-1,514	2,357
Income (loss) from equity investment	77	3	319	-228
Other income	191	310	691	859
Earnings before income tax	12,365	8,039	30,545	25,939
Income tax expense	3,600	2,366	6,343	7,324
Net income	8,765	5,673	24,202	18,615
Gain attributable to non-controlling interest	-63	-1,672	-1,340	-4,491
Net income attributable to Gentherm Incorporated	8,702	4,001	22,862	14,124
Convertible preferred stock dividends	-159	-1,516	-1,622	-5,521
Net income attributable to common shareholders	$8,543	$2,485	$21,240	$8,603
Basic earnings per share	$0.25	$0.08	$0.64	$0.31
Diluted earnings per share	$0.24	$0.08	$0.63	$0.30
Weighted average number of shares – basic	34,447,098	29,618,964	33,261,115	28,177,182
Weighted average number of shares – diluted	34,886,462	30,003,347	33,584,226	28,675,643

Consolidated_Condensed_Stateme1

Consolidated Condensed Statements of Comprehensive Income (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Net income	$24,202	$18,615
Other comprehensive income, net of tax:	'	'
Foreign currency translation adjustments	1,848	1,649
Unrealized gain (loss) on interest rate derivative securities	105	-55
Foreign currency translation adjustments from deferred tax	-197	'
Other comprehensive loss, net of tax	1,756	1,594
Comprehensive income	25,958	20,209
Less: comprehensive income attributable to the non-controlling interest	1,173	4,844
Comprehensive income attributable to Gentherm Incorporated	$24,785	$15,365

Consolidated_Condensed_Stateme2

Consolidated Condensed Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities:	'	'
Net income	$24,202	$18,615
Adjustments to reconcile net income to cash provided by operating activities:	'	'
Depreciation and amortization	23,467	22,737
Deferred tax provision	-1,138	2,134
Stock compensation	1,861	911
Defined benefit plan expense	-159	-303
Provision of doubtful accounts	369	-305
Gain on revaluation of financial derivatives	-2,859	-1,064
Loss (gain) on equity investment	-318	228
Loss on sale of property, plant and equipment	48	53
Excess tax benefit from equity awards	-1,317	-1,577
Changes in operating assets and liabilities:	'	'
Accounts receivable	-19,606	-16,728
Inventory	-8,824	-4,250
Prepaid expenses and other assets	-2,458	-7,264
Accounts payable	11,250	4,622
Accrued liabilities	4,099	10,715
Net cash provided by operating activities	28,617	28,524
Investing Activities:	'	'
Purchase of non-controlling interest	-46,835	'
Purchase of derivative financial instruments	'	-7,787
Proceeds from the sale of property, plant and equipment	7	20
Purchase of property and equipment	-30,016	-15,344
Loan to equity investment	'	-590
Cash invested in corporate owned life insurance	-266	-265
Patent costs	'	-1,744
Net cash used in investing activities	-77,110	-25,710
Financing Activities:	'	'
Borrowing of debt	48,923	3,286
Repayments of debt	-18,966	-19,149
Distributions paid to non-controlling interests	-3	-290
Proceeds from public offering of common stock	'	75,487
Excess tax benefit from equity awards	1,317	1,577
Cash paid to Series C Preferred Stock Holders	-9,142	-17,340
Proceeds from the exercise of Common Stock options	2,901	733
Net cash provided by financing activities	25,030	46,225
Foreign currency effect	1,314	-599
Net increase (decrease) in cash and cash equivalents	-22,149	48,440
Cash and cash equivalents at beginning of period	58,152	23,839
Cash and cash equivalents at end of period	36,003	72,279
Supplemental disclosure of cash flow information:	'	'
Cash paid for taxes	7,174	5,678
Cash paid for interest	2,249	2,787
Supplemental disclosure of non-cash transactions:	'	'
Common stock issued to Board of Directors and employees	1,028	314
Issuance of common stock to non-controlling interest	42,517	'
Issuance of common stock for Series C Preferred Stock conversion	15,508	'
W.E.T.	'	'
Financing Activities:	'	'
Proceeds from sale of W.E.T. equity to non-controlling interest	'	$1,921

Consolidated_Condensed_Stateme3

Consolidated Condensed Statement of Changes In Shareholders' Equity (USD $)	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings	Accumulated Other Comprehensive Income (Loss)	Stockholders' Equity, Total	Noncontrolling Interest
In Thousands, except Share data
Beginning Balance at Dec. 31, 2012	$215,163	$166,309	$24,120	($17,383)	($11,231)	$161,815	$53,348
Beginning Balance (in shares) at Dec. 31, 2012	'	29,818,000	'	'	'	'	'
Exercise of Common Stock options for cash	2,901	4,023	-1,122	'	'	2,901	'
Exercise of Common Stock options for cash (in shares)	'	437,000	'	'	'	'	'
Tax benefit from Exercises of Common Stock options	1,317	'	1,317	'	'	1,317	'
Stock issued upon conversion of preferred stock	15,108	15,108	'	'	'	15,108	'
Stock issued upon conversion of preferred stock (in shares)	'	954,000	'	'	'	'	'
Stock option compensation	833	'	833	'	'	833	'
Common Stock issued to Board of Directors and employees	1,028	1,028	'	'	'	1,028	'
Common Stock issued to Board of Directors and employees (in shares)	'	180,000	'	'	'	'	'
Convertible preferred stock dividends	-1,622	'	'	-1,622	'	-1,622	'
Acquisition of non-controlling interest	-45,034	42,517	-34,224	'	'	8,293	-53,327
Acquisition of non-controlling interest (in shares)	'	3,300,000	'	'	'	'	'
Distribution paid to non-controlling interest	-6	'	'	-3	'	-3	-3
Interest rate hedge, net	105	'	'	'	105	105	'
Currency translation, net	1,848	'	'	'	2,015	2,015	-167
Foreign currency translation adjustments from deferred tax	-197	'	'	'	-197	-197	'
Net income	24,202	'	'	22,862	'	22,862	1,340
Ending Balance at Sep. 30, 2013	$215,646	$228,985	($9,076)	$3,854	($9,308)	$214,455	$1,191
Ending Balance (in shares) at Sep. 30, 2013	'	34,689,000	'	'	'	'	'

The_Company_and_Subsequent_Eve

The Company and Subsequent Event	9 Months Ended
	Sep. 30, 2013
The Company and Subsequent Event	'
	Note 1 – The Company and Subsequent Event
	Gentherm Incorporated is a leading supplier of thermal seat comfort and cable systems to the global automotive industry. Unless the context otherwise requires, the terms “Gentherm”, “Company”, “we”, “us” and “our” used herein refer to Gentherm Incorporated. The term “historical Gentherm” used herein excludes W.E.T. Automotive Systems AG (“W.E.T.”), a subsidiary of Gentherm Incorporated. The Company performs design, development and manufacturing functions in locations aligned with our major customers’ product strategies in order to grow and expand our business around the globe. We are working to expand application of our existing technologies into new markets and products and to develop and refine new technologies to improve our existing products.
	On February 22, 2013, historical Gentherm acquired an additional 442,253 shares in W.E.T., representing approximately 14% of the total outstanding shares in W.E.T., through a transaction agreement with W.E.T.’s largest minority shareholder. The Company paid 3,300,000 shares of Gentherm common stock and cash of €5,408, or $7,247, for these shares. As of September 30, 2013, we had acquired an additional 309,537 shares in W.E.T., raising our total ownership interest in W.E.T. above 99%. These additional shares were purchased at a price of €85 per share for a total of €26,311, or $35,256. Gentherm borrowed an additional $40,441 from the US Bank of America credit facility in connection with the purchase of these shares. See Note 6 below for additional information about the US Bank of America credit facility.
	On February 22, 2013, the Company registered a Domination and Profit and Loss Transfer Agreement (“DPLTA”) in Germany with respect to W.E.T. The DPLTA essentially allows historical Gentherm and W.E.T. to be managed as one operational entity.
	Subsequent Event
	On October 31, 2013, the Company announced that it had registered a squeeze-out transaction in Germany and now owns 100 percent of the outstanding shares of W.E.T.  As a result of the squeeze-out, the remaining shares of W.E.T., representing less than one percent of W.E.T.’s outstanding shares, were transferred to Gentherm and the applicable minority shareholders are entitled to receive €90.05 per share held at the time of registration.

Basis_of_Presentation_and_New_

Basis of Presentation and New Accounting Pronouncements	9 Months Ended
	Sep. 30, 2013
Basis of Presentation and New Accounting Pronouncements	'
	Note 2 – Basis of Presentation and New Accounting Pronouncements
	The accompanying unaudited consolidated condensed financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring items, considered necessary for a fair presentation have been included. The balance sheet as of December 31, 2012 was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. Operating results for the nine month period ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. It is suggested that these consolidated condensed financial statements be read in conjunction with the financial statements and the notes thereto for the year ended December 31, 2012 included in our Annual Report on Form 10-K.
	Hedge Accounting
	In July 2013, the Financial Accounting Standards Board (FASB) issued ASU 2013-10 which permits the use of the Overnight Index Swap Rate (OIS), also referred to as the Fed Fund Effective Swap Rate as a U.S. GAAP benchmark interest rate for hedge accounting purposes under Topic 815. Currently, only the interest rates on direct Treasury obligations of the U.S. government (UST) and the London Interbank Offered Rate (LIBOR) swap rate are considered benchmark interest rates in the United States. This update also removes the restriction on using different benchmark rates for similar hedges. Including the Fed Funds Effective Swap Rate as an acceptable U.S. benchmark interest rate in addition to UST and LIBOR will provide risk managers with a more comprehensive spectrum of interest rate resets to utilize as the designated interest risk component under the hedge accounting guidance in Topic 815. The amendments of this ASU are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013.
	Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued
	We do not anticipate that the adoption of this guidance will have a material effect on our consolidated balance sheet or statement of operations.
	Unrecognized Tax Benefits
	ASU 2013-11, issued in July 2013, requires that an unrecognized tax benefit be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. When a net operating loss, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purposes, the unrecognized tax benefit should be presented in the financial statements as a liability. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date.
	ASU 2013-11 is effective for fiscal years and interim periods beginning after December 15, 2013 and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. As Gentherm already nets together an unrecognized tax benefit associated with a deferred tax asset from tax credit carryforwards, we do not anticipate an impact to our consolidated balance sheet resulting from the adoption of this guidance.
	Tax Regulation
	The Company is evaluating the impact of the regulations concerning amounts paid to acquire, produce, or improve tangible property and recovery of basis upon disposition. Because the revenue procedures governing the tangible property regulations will not be issued until the fourth quarter, the Company is still determining whether or not any changes in accounting method will be required and if they will result in a material impact to its financial statements. At this time, the Company does not anticipate there being a material impact.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share	'
	Note 3 – Earnings per Share
	Basic earnings per common share are computed by dividing net income by the weighted average number of shares of stock outstanding. The Company’s diluted earnings per common share give effect to all potential shares of Common Stock outstanding during a period that are not anti-dilutive. In computing the diluted earnings per share, the treasury stock and if converted methods are used in determining the number of shares assumed to be purchased from the conversion of Common Stock equivalents.
	The following summarizes the amounts included in the dilutive shares as disclosed on the face of the consolidated condensed statements of operations:
		Three Months			Nine Months
		Ended September 30,			Ended September 30,
			2013	2012		2013	2012
	Weighted average number of shares for calculation of basic EPS – Common Stock		34,447,098	29,618,964		33,261,115	28,177,182
	Impact of stock options outstanding under the 1997, 2006 and 2011 Stock Option Plans		439,364	384,383		323,111	498,461
	Weighted average number of shares for calculation of diluted EPS		34,886,462	30,003,347		33,584,226	28,675,643
	The accompanying table represents Common Stock issuable upon the exercise of certain stock options, the Series C Convertible Preferred Stock and potential dividends paid in common stock that have been excluded from the diluted shares calculation because the effect of their inclusion would be anti-dilutive.
		Three Months			Nine Months
		Ended September 30,			Ended September 30,
			2013	2012		2013	2012
	Stock options outstanding under the 2006, 2011 and 2013 Stock Option Plans		500,000	584,586		508,000	584,586
	Series C Convertible Preferred Stock		—	2,092,291		—	2,092,291
			500,000	2,676,877		508,000	2,676,877

Segment_Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2013
Segment Reporting	'
	Note 4 – Segment Reporting
	Segment information is used by management for making operating decisions and assessing the performance of the Company. Management evaluates the performance of its segments based primarily on operating income.
	The Company’s reportable segments are as follows:
	     Climate Control Seats (CCS) – variable temperature seat climate control system designed to improve the temperature comfort of automobile passengers. This segment also includes the heated and cooled cup holder and heated and cooled mattress divisions. This segment represents historical Gentherm business only.  It does not include seat climate control products of historical W.E.T.
	     Advanced Technology – a division engaged in research and development efforts to improve the efficiency of thermoelectric devices and to develop, market and distribute products based on this new technology. It includes U.S. Department of Energy sponsored research projects, such as the development of a commercially viable thermoelectric generator.
	     W.E.T. Automotive AG (W.E.T.) – W.E.T. is being evaluated currently as an individual segment until such time as Gentherm is able to fully evaluate and implement its future integration plans and strategy.
	The tables below present segment information about the reported product revenues and operating income of the Company for the three month period ended September 30, 2013 and 2012. With the exception of goodwill, asset information by segment is not reported since the Company does not manage assets at a segment level at this time. Goodwill as of September 30, 2013 and 2012 pertained entirely to our W.E.T. segment.
	Three Months Ended September 30,		CCS					Advanced						W.E.T.					Reconciling				Consolidated
								Technology											Items				Total
	2013:00:00
	Product revenues		$		37,697		$		—				$			133,485		$		—		$		171,182
	Depreciation and amortization				437				117							6,870				313				7,737
	Operating income (loss)				11,152				(1,544	)						11,297				(6,351	)			14,554
	2012:00:00
	Product revenues		$		33,966		$		—				$			107,092		$		—		$		141,058
	Depreciation and amortization				329				82							6,692				342				7,445
	Operating income (loss)				9,328				(1,631	)						8,249				(5,908	)			10,038
	The Advanced Technology operating loss for the three months ended September 30, 2013 and 2012 is net of $375 and $656, respectively, of reimbursed research and development costs. Reconciling items include historical Gentherm’s corporate selling, general and administrative costs and acquisition transaction costs.
	Nine Months Ended September 30,		CCS					Advanced						W.E.T.					Reconciling				Consolidated
								Technology											Items				Total
	2013:00:00
	Product revenues		$		103,460		$		—				$			376,332		$		—		$		479,792
	Depreciation and amortization				1,115				344							21,143				865				23,467
	Operating income (loss)				28,953				(5,174	)						28,407				(19,422	)			32,764
	2012:00:00
	Product revenues		$		96,117		$		—				$			310,620		$		—		$		406,737
	Depreciation and amortization				787				388							20,697				865				22,737
	Operating income (loss)				25,037				(5,260	)						22,274				(14,962	)			27,089
	The Advanced Technology operating loss for the nine months ended September 30, 2013 and 2012 is net of $1,597 and $1,763, respectively, of reimbursed research and development costs. Reconciling items include historical Gentherm’s corporate selling, general and administrative costs and acquisition transaction costs.
	Note 4 – Segment Reporting – Continued
	Total product revenues information by geographic area:
		Three Months
		Ended September 30,
		2013									2012
	United States	$		76,543		45	%		$			60,012			42		%
	Germany			20,847		12	%					17,773			13		%
	China			18,285		11	%					15,694			11		%
	South Korea			13,546		8	%					10,716			8		%
	Japan			10,281		6	%					10,294			7		%
	United Kingdom			5,180		3	%					3,407			2		%
	Mexico			4,230		2	%					3,581			3		%
	Czech Republic			4,114		2	%					4,375			3		%
	Canada			3,432		2	%					2,782			2		%
	Other			14,724		9	%					12,424			9		%
	Total product revenues	$		171,182		100	%		$			141,058			100		%
		Nine Months
		Ended September 30,
		2013									2012
	United States	$		211,462		44	%		$			173,233			43		%
	Germany			61,332		13	%					49,405			12		%
	China			47,972		10	%					43,510			11		%
	South Korea			39,069		8	%					31,213			8		%
	Japan			28,591		6	%					24,014			6		%
	United Kingdom			13,319		3	%					12,959			3		%
	Czech Republic			11,893		3	%					12,102			3		%
	Mexico			11,696		2	%					11,467			3		%
	Canada			10,533		2	%					9,527			2		%
	Other			43,925		9	%					39,307			10		%
	Total product revenues	$		479,792		100	%		$			406,737			100		%

Series_C_Convertible_Preferred

Series C Convertible Preferred Stock	9 Months Ended
	Sep. 30, 2013
Series C Convertible Preferred Stock	'
	Note 5 – Series C Convertible Preferred Stock
	In March 2011, the Company issued 7,000 shares of our Series C Convertible Preferred Stock (each a “Preferred Share” and, collectively, the “Preferred Shares”) having an initial stated value of $10,000 per Preferred Share, subject to adjustment. We received approximately $64,013 in net proceeds from the sale, after deducting placement agent fees and other offering expenses which totaled $5,987. We used the net proceeds from this offering to fund, in part, the W.E.T. acquisition.
	Holders of the Series C Convertible Preferred Stock were entitled to receive, out of funds legally available therefore, dividends payable in cash (if permitted under the US Bank of America credit facility), our Common Stock (if certain equity conditions are satisfied or waived as of the applicable date), or any combination thereof, at the election of the Company, at the rate of 8% per annum of the stated value, payable quarterly in arrears on September 1, December 1, March 1 and June 1 of each year, commencing September 1, 2011. Dividends on our Series C Convertible Preferred Stock are cumulative from the date of initial issuance.
	The Series C Convertible Preferred Stock was to be redeemed in nine equal quarterly installments that began on September 1, 2011 and ended September 1, 2013 (each, an “Amortization Date”) by paying cash, issuing shares of our Common Stock or any combination thereof for $10,000 per Preferred Share plus accumulated and unpaid dividends.
	Note 5 – Series C Convertible Preferred Stock – Continued
	Holders of the Series C Convertible Preferred Stock could have converted their shares at any time into shares of common stock at a conversion price of $15.83, including the conversion of accrued but unpaid dividends per Preferred Share then remaining into shares of common stock, and in addition would be entitled to a make-whole amount that would apply in a conversion (reflecting dividends that would have been payable through maturity if the Series C Convertible Preferred Stock had remained outstanding); provided, however, that under certain conditions where our US Bank of America credit facility prohibits payment of the make-whole amount, we would only be obligated to pay such make-whole amount at the time such amount, or portion thereof, would have been due to be paid as a dividend as if the Series C Convertible Preferred Stock at issue had not been converted.
	In March 2013, holders of the Series C Convertible Preferred Stock elected to convert 165 shares into shares of common stock at the conversion price of $15.83 per share. The Company issued approximately 105,000 shares of common stock related to the conversion of Series C Convertible Preferred Stock.
	In May 2013, holders of the Series C Convertible Preferred Stock elected to convert 650 shares into shares of common stock at the conversion price of $15.83 per share. The Company issued approximately 418,000 shares of common stock related to the conversion of Series C Convertible Preferred Stock.
	During the months of July and August, 2013, holders of the Series C Convertible Preferred Stock elected to convert all unredeemed remaining shares of common stock at the conversion price of $15.83 per share.  The Company issued approximately 432,000 shares of common stock related to the conversion of Series C Convertible Preferred Stock.
	Total Series C Convertible Preferred Stock installments paid in cash during the nine months period ended September 30, 2013 is as follows:
		Installment
		Payments ($)
	Dividend	$	696
	Principal		8,446
	Total	$	9,142

Debt

Debt	9 Months Ended
	Sep. 30, 2013
Debt	'
	Note 6 – Debt
	Gentherm, Inc. and our subsidiary, Gentherm Europe, have entered into a credit agreement with a syndicate of banks led by Bank of America (the “US Bank of America credit facility”). W.E.T., a subsidiary of Gentherm Europe, has also entered into a credit facility with the same syndicate of banks (the “W.E.T. Bank of America credit facility”).
	The US Bank of America credit facility provided two term notes (referred to as the “US Term Note and Europe Term Note”) and a revolving line of credit note (“US Revolving Note”). The W.E.T. Bank of America credit facility provided W.E.T. with a term note (“W.E.T. Term Note”) and a revolving line of credit note (“W.E.T. Revolving Note”).
	The US Term Note and Europe Term Note are subject to quarterly principal payments, with total principal amortization of 10% of the original principal amount in the first year and amortization of 12.5%, 15%, 17.5% and 10% of the original principal amount during years two, three, four and five, respectively with all remaining amounts owing under each term facility due and payable in full at the term loan maturity date. The W.E.T. Term Note is subject to quarterly principal payments totaling 20% annually. Principal outstanding under the two credit facilities will be due and payable in full on March 30, 2016. Interest is payable at least quarterly. The Company has the option to elect interest rates based on either a Eurocurrency (LIBOR or EURIBOR) rate (“Eurocurrency Rate Loans”) (0.17% – 0.45% at September 30, 2013) or a base rate (“Base Rate Loans”) plus a margin (“Applicable Rate”), which varies based on the Consolidated Leverage Ratio of the Company, as defined by the US and W.E.T. Bank of America credit agreements. The base rate is equal to the highest of the Federal Funds Rate (0.06% at September 30, 2013) plus 0.5%, Bank of America’s prime rate (3.25% at September 30, 2013), or a one month Eurocurrency rate plus 1.0%. The Applicable Rate for the current period was 2.25% for Eurocurrency Rate Loans and 1.25% for Base Rate Loans. The Company must maintain a minimum Consolidated Fixed Charge Coverage Ratio and a maximum Leverage Ratio, as defined by the Bank of America credit agreement. The loans are secured by all of the Company’s assets.
	In February 2013, the Company made a $40,441 draw on the existing Europe Term Note portion of the US Bank of America credit facility to finance the purchase of shares of WET held by non-controlling interests. The Europe Term Note has expired and additional draws are not available to Gentherm.
	Note 6 – Debt – Continued
	In September 2012, we borrowed CN¥20,000, or $3,159, from Bank of China to fund a plant expansion project in China. The Bank of China loan was paid in full on September 10, 2013 with interest calculated at a fixed rate of 6.9%.
	In May 2013, the Company made an initial draw of €2,000, or $2,601, on a loan from the German Investment Corporation, a subsidiary of KfW banking group, a German government-owned development bank (“DEG Loan”), to fund the China plant expansion project. An additional draw of €2,000, or $2,701, was made in September and the entire loan balance was rolled into a fixed interest rate loan with an interest rate of 3% plus a Euro Swap Rate of 1.25%.  The Bank of China short term financing used to complete the project was repaid from funds available under the DEG Loan.  The DEG Loan is subject to semi-annual principal payments beginning March, 2015 and ending September, 2019.  Under the terms of the loan, the Company must maintain a minimum Debt-to-Equity Ratio, Current Ratio and Debt Service Coverage Ratio based on the financial statements of W.E.T. Automotive Systems (China) Limited, as defined by the DEG Loan agreement.
	The Company’s capital lease agreement for an enterprise resource planning system ended in May.  A new lease agreement for an enterprise resource planning system commenced June, 2013 and will end May, 2015.  Under the terms of the lease, the Company must maintain certain financial covenants. Ownership of the system will be transferred to the Company at the end of the agreement.
	No amounts were outstanding under either the US Revolving Note or the W.E.T. Revolving Note as of September 30, 2013 and $29,550 and €20,000 were available under each note, respectively. Gentherm has an outstanding Letter of Credit of $450 as of September 30, 2013.
	The following table summarizes the Company’s debt at September 30, 2013 and at December 31, 2012.
		September 30, 2013						December 31,
								2012
		Interest			Principal			Principal
		Rate			Balance			Balance
	US Term Note		2.50	%	$	25,813		$	29,312
	Europe Term Note		2.50	%		40,507			4,476
	W.E.T. Term Note		2.00	%		12,897			18,852
	DEG Loan		4.25	%		5,403			—
	Capital Leases		4.20	%		2,814			1,140
	Bank of China					—			3,172
	Total debt					87,434			56,952
	Current portion					(22,164	)		(17,218	)
	Long-term debt, less current maturities				$	65,270		$	39,734
	As of September 30, 2013, we were in compliance with all terms as outlined in the credit agreement for each of the US Bank of America credit facility, the W.E.T. Bank of America credit facility, the DEG loan and the capital lease agreement.

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2013
Derivative Financial Instruments	'
	Note 7 – 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. Foreign currency exchange risks are attributable to sales to foreign customers not denominated in the seller’s functional currency, foreign plant operations, intercompany indebtedness and purchases from foreign suppliers and include exposures to the European Euro, Canadian Dollar, Japanese Yen, Hungarian Forint, Korean Won and Mexican Peso. The Company regularly enters into derivative contracts with the objective of managing its financial and operational exposure arising from this risk by offsetting gains and losses on the underlying exposures with gains and losses on the financial instruments used to hedge them. 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. We record the ineffective portion of hedging instruments, if any, to other income (expense) in the consolidated condensed statements of operations.
	Note 7 – Derivative Financial Instruments – Continued
	In March 2008, W.E.T. entered into a 10 year currency related interest rate swap (“CRS”) having a notional value of €10,000, or $13,508 as of September 30, 2013, in order to offset the interest rate risk associated with a debt financing which was repaid prior to our acquisition of W.E.T. Under this agreement W.E.T. receives interest equal to the then nine month Euro Interbank Offered Rate (“EURIBOR”), 0.45% at September 30, 2013, plus 1.40% and pays interest equal to the nine month EURIBOR when the exchange rate between the European Euro (“EUR”) and the Swiss Franc (“CHF”), which was 1.23 at September 30, 2013, equals or exceeds 1.46 EUR to the CHF or pays interest equal to the six month EURIBOR plus a premium when this exchange rate is less than 1.46. The premium is calculated as [(1.46 – current EUR/CHF rate)/current EUR/CHF rate] x 100. In 2012, W.E.T. entered into offsetting derivative contracts designed to cancel out the payment due under the CRS through the end of the CRS agreement, in 2018.
	In September 2011, W.E.T. brought a lawsuit against UniCredit Bank AG (“UniCredit”), a past financial advisor, stemming from the recommendation to invest in the aforementioned CRS. On March 25, 2013, the Munich District Court in Munich, Germany ruled in favor of W.E.T., asserting that UniCredit violated its duty to properly advise W.E.T. with respect to the initial negative market value for the CRS and UniCredit’s inherent conflict of interest in recommending that W.E.T. invest in CRS. The Munich District Court ruled that UniCredit must (1) pay €144 to W.E.T. and (2) bear the costs of all future obligations under the CRS, which were €8,906 or $12,030 as of September 30, 2013, plus additional accrued liabilities for past due payments under the CRS of approximately €4,930, or $6,659 as of September 30, 2013. UniCredit has appealed the decision. As a result, the Company cannot be certain that any portion of the decision by the Munich District Court will be realized by W.E.T. See the derivatives table below for information about our future obligations under the CRS as of September 30, 2013.
	In July 2011, the Company entered into a series of interest rate swap contracts designated as cash flow hedges and an interest rate cap agreement in order to hedge the exposure to variable market interest rates on the Company’s senior debt. Gains and losses reported in accumulated other comprehensive income will be reclassified to earnings once the Company’s senior debt is repaid.
	The Company uses a market approach to value derivative instruments, analyzing observable 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 balance sheet as of September 30, 2013 is as follows:
						Asset Derivatives					Liability Derivatives					Net Asset/
																(Liabilities)
		Hedge Designation		Fair Value		Balance Sheet		Fair			Balance Sheet	Fair
				Hierarchy		Location		Value			Location	Value
	CRS	Not a hedge		Level 2							Current liabilities	$	(2,476	)
											Non current liabilities		(9,553	)
	Total CRS											$	(12,029	)	$		(12,029	)
	Foreign currency derivatives	Not a hedge		Level 2		Current assets		$	3		Current liabilities	$	(57	)	$		(54	)
	Foreign currency derivatives	Not a hedge		Level 2		Current assets		$	289						$		289
						Non current assets			2,403						$		2,403
	Total foreign currency derivatives							$	2,695			$	(57	)	$		2,638
	Interest rate swap derivatives	Cash flow hedge		Level 2							Current liabilities	$	(119	)	$		(119	)
	Note 7 – Derivative Financial Instruments – Continued
	Information relating to the effect of derivative instruments on our consolidated income statements is as follows:
			Location		Three				Nine
					Months Ended September 30,				Months Ended
					2013				September 30,
									2013
	Foreign currency derivatives		Revaluation of derivatives		$		581		$	(694	)
			Foreign currency gain (loss)				(426	)		(844	)
	Total foreign currency derivatives				$		155		$	(1,538	)
	CRS		Revaluation of derivatives		$		(364	)	$	1,895
	Commodity derivatives		Revaluation of derivatives		$		—		$	—
	Interest Rate Swap		Interest Expense		$		8		$	8
			Other Comprehensive Income		$		30		$	105
			Location		Three				Nine
					Months Ended				Months Ended
					September 30,				September 30,
					2012				2012
	Foreign currency derivatives		Revaluation of derivatives		$		(2,036	)	$	(2,514	)
			Foreign currency gain (loss)				1,051			1,722
	Total foreign currency derivatives				$		(985	)	$	(792	)
	CRS		Revaluation of derivatives		$		1,045		$	1,315
	Commodity derivatives		Revaluation of derivatives		$		(2	)	$	143
	Interest Rate Swap		Interest Expense		$		(12	)	$	(54	)
			Other Comprehensive Income		$		(25	)	$	(55	)
	We did not incur any hedge ineffectiveness during the nine months ended September 30, 2013 and 2012.

Fair_Value_Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2013
Fair Value Measurement	'
	Note 8 – Fair Value Measurement
	The Company bases fair value on the 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: Observable prices that are based on inputs not quoted on active markets, but corroborated by market data.
	Level 3: Unobservable inputs 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.
	The Company’s derivative instruments and hedging activities and pension assets qualify as financial assets and liabilities whose fair value is measured on a recurring basis each reporting period. Fair value measurement disclosures for our derivative instruments and hedging activities are located within Note 7. The carrying amounts of financial instruments comprising cash and cash equivalents, short-term investments and accounts receivable approximate their fair values due to their short-term nature. The carrying value of the Company’s long-term debt approximates its fair value because interest charged on the loan balance is variable. There were no significant changes to interest rates during the period.
	Certain Company assets are required to be recorded at fair value on a non-recurring basis when events and circumstances indicate that the carrying value may not be recoverable. As of September 30, 2013 and 2012, the Company did not realize any changes to the fair value of these assets due to events that negatively impacted their recoverability.

Basis_of_Presentation_and_New_1

Basis of Presentation and New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2013
New Accounting Pronouncements	'
	Hedge Accounting
	In July 2013, the Financial Accounting Standards Board (FASB) issued ASU 2013-10 which permits the use of the Overnight Index Swap Rate (OIS), also referred to as the Fed Fund Effective Swap Rate as a U.S. GAAP benchmark interest rate for hedge accounting purposes under Topic 815. Currently, only the interest rates on direct Treasury obligations of the U.S. government (UST) and the London Interbank Offered Rate (LIBOR) swap rate are considered benchmark interest rates in the United States. This update also removes the restriction on using different benchmark rates for similar hedges. Including the Fed Funds Effective Swap Rate as an acceptable U.S. benchmark interest rate in addition to UST and LIBOR will provide risk managers with a more comprehensive spectrum of interest rate resets to utilize as the designated interest risk component under the hedge accounting guidance in Topic 815. The amendments of this ASU are effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013.
	Note 2 – Basis of Presentation and New Accounting Pronouncements – Continued
	We do not anticipate that the adoption of this guidance will have a material effect on our consolidated balance sheet or statement of operations.
	Unrecognized Tax Benefits
	ASU 2013-11, issued in July 2013, requires that an unrecognized tax benefit be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. When a net operating loss, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purposes, the unrecognized tax benefit should be presented in the financial statements as a liability. The assessment of whether a deferred tax asset is available is based on the unrecognized tax benefit and deferred tax asset that exist at the reporting date and should be made presuming disallowance of the tax position at the reporting date.
	ASU 2013-11 is effective for fiscal years and interim periods beginning after December 15, 2013 and should be applied prospectively to all unrecognized tax benefits that exist at the effective date. As Gentherm already nets together an unrecognized tax benefit associated with a deferred tax asset from tax credit carryforwards, we do not anticipate an impact to our consolidated balance sheet resulting from the adoption of this guidance.
	Tax Regulation
	The Company is evaluating the impact of the regulations concerning amounts paid to acquire, produce, or improve tangible property and recovery of basis upon disposition. Because the revenue procedures governing the tangible property regulations will not be issued until the fourth quarter, the Company is still determining whether or not any changes in accounting method will be required and if they will result in a material impact to its financial statements. At this time, the Company does not anticipate there being a material impact.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Dilutive Shares of Consolidated Condensed Statements of Operations	'
	The following summarizes the amounts included in the dilutive shares as disclosed on the face of the consolidated condensed statements of operations:
		Three Months			Nine Months
		Ended September 30,			Ended September 30,
			2013	2012		2013	2012
	Weighted average number of shares for calculation of basic EPS – Common Stock		34,447,098	29,618,964		33,261,115	28,177,182
	Impact of stock options outstanding under the 1997, 2006 and 2011 Stock Option Plans		439,364	384,383		323,111	498,461
	Weighted average number of shares for calculation of diluted EPS		34,886,462	30,003,347		33,584,226	28,675,643
Common Stock Issuable upon Exercise of Certain Stock Options	'
	The accompanying table represents Common Stock issuable upon the exercise of certain stock options, the Series C Convertible Preferred Stock and potential dividends paid in common stock that have been excluded from the diluted shares calculation because the effect of their inclusion would be anti-dilutive.
		Three Months			Nine Months
		Ended September 30,			Ended September 30,
			2013	2012		2013	2012
	Stock options outstanding under the 2006, 2011 and 2013 Stock Option Plans		500,000	584,586		508,000	584,586
	Series C Convertible Preferred Stock		—	2,092,291		—	2,092,291
			500,000	2,676,877		508,000	2,676,877

Segment_Reporting_Tables

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Information about Reported Product Revenues and Operating Income	'
	The tables below present segment information about the reported product revenues and operating income of the Company for the three month period ended September 30, 2013 and 2012. With the exception of goodwill, asset information by segment is not reported since the Company does not manage assets at a segment level at this time. Goodwill as of September 30, 2013 and 2012 pertained entirely to our W.E.T. segment.
	Three Months Ended September 30,		CCS					Advanced						W.E.T.					Reconciling				Consolidated
								Technology											Items				Total
	2013:00:00
	Product revenues		$		37,697		$		—				$			133,485		$		—		$		171,182
	Depreciation and amortization				437				117							6,870				313				7,737
	Operating income (loss)				11,152				(1,544	)						11,297				(6,351	)			14,554
	2012:00:00
	Product revenues		$		33,966		$		—				$			107,092		$		—		$		141,058
	Depreciation and amortization				329				82							6,692				342				7,445
	Operating income (loss)				9,328				(1,631	)						8,249				(5,908	)			10,038
	Nine Months Ended September 30,		CCS					Advanced						W.E.T.					Reconciling				Consolidated
								Technology											Items				Total
	2013:00:00
	Product revenues		$		103,460		$		—				$			376,332		$		—		$		479,792
	Depreciation and amortization				1,115				344							21,143				865				23,467
	Operating income (loss)				28,953				(5,174	)						28,407				(19,422	)			32,764
	2012:00:00
	Product revenues		$		96,117		$		—				$			310,620		$		—		$		406,737
	Depreciation and amortization				787				388							20,697				865				22,737
	Operating income (loss)				25,037				(5,260	)						22,274				(14,962	)			27,089
Product Revenues Information by Geographic Area	'
	Total product revenues information by geographic area:
		Three Months
		Ended September 30,
		2013									2012
	United States	$		76,543		45	%		$			60,012			42		%
	Germany			20,847		12	%					17,773			13		%
	China			18,285		11	%					15,694			11		%
	South Korea			13,546		8	%					10,716			8		%
	Japan			10,281		6	%					10,294			7		%
	United Kingdom			5,180		3	%					3,407			2		%
	Mexico			4,230		2	%					3,581			3		%
	Czech Republic			4,114		2	%					4,375			3		%
	Canada			3,432		2	%					2,782			2		%
	Other			14,724		9	%					12,424			9		%
	Total product revenues	$		171,182		100	%		$			141,058			100		%
		Nine Months
		Ended September 30,
		2013									2012
	United States	$		211,462		44	%		$			173,233			43		%
	Germany			61,332		13	%					49,405			12		%
	China			47,972		10	%					43,510			11		%
	South Korea			39,069		8	%					31,213			8		%
	Japan			28,591		6	%					24,014			6		%
	United Kingdom			13,319		3	%					12,959			3		%
	Czech Republic			11,893		3	%					12,102			3		%
	Mexico			11,696		2	%					11,467			3		%
	Canada			10,533		2	%					9,527			2		%
	Other			43,925		9	%					39,307			10		%
	Total product revenues	$		479,792		100	%		$			406,737			100		%

Series_C_Convertible_Preferred1

Series C Convertible Preferred Stock (Tables)	9 Months Ended
	Sep. 30, 2013
Series C Convertible Preferred Stock Installments	'
	Total Series C Convertible Preferred Stock installments paid in cash during the nine months period ended September 30, 2013 is as follows:
		Installment
		Payments ($)
	Dividend	$	696
	Principal		8,446
	Total	$	9,142

Debt_Tables

Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Summary of Company's debt	'
	The following table summarizes the Company’s debt at September 30, 2013 and at December 31, 2012.
		September 30, 2013						December 31,
								2012
		Interest			Principal			Principal
		Rate			Balance			Balance
	US Term Note		2.50	%	$	25,813		$	29,312
	Europe Term Note		2.50	%		40,507			4,476
	W.E.T. Term Note		2.00	%		12,897			18,852
	DEG Loan		4.25	%		5,403			—
	Capital Leases		4.20	%		2,814			1,140
	Bank of China					—			3,172
	Total debt					87,434			56,952
	Current portion					(22,164	)		(17,218	)
	Long-term debt, less current maturities				$	65,270		$	39,734

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Information Related to Recurring Fair Value Measurement of Derivative Instruments	'
	Information related to the recurring fair value measurement of derivative instruments in our consolidated balance sheet as of September 30, 2013 is as follows:
						Asset Derivatives					Liability Derivatives					Net Asset/
																(Liabilities)
		Hedge Designation		Fair Value		Balance Sheet		Fair			Balance Sheet	Fair
				Hierarchy		Location		Value			Location	Value
	CRS	Not a hedge		Level 2							Current liabilities	$	(2,476	)
											Non current liabilities		(9,553	)
	Total CRS											$	(12,029	)	$		(12,029	)
	Foreign currency derivatives	Not a hedge		Level 2		Current assets		$	3		Current liabilities	$	(57	)	$		(54	)
	Foreign currency derivatives	Not a hedge		Level 2		Current assets		$	289						$		289
						Non current assets			2,403						$		2,403
	Total foreign currency derivatives							$	2,695			$	(57	)	$		2,638
	Interest rate swap derivatives	Cash flow hedge		Level 2							Current liabilities	$	(119	)	$		(119	)
Information Relate to Effect of Derivative Instruments on Our Consolidated Income Statements	'
	Note 7 – Derivative Financial Instruments – Continued
	Information relating to the effect of derivative instruments on our consolidated income statements is as follows:
			Location		Three				Nine
					Months Ended September 30,				Months Ended
					2013				September 30,
									2013
	Foreign currency derivatives		Revaluation of derivatives		$		581		$	(694	)
			Foreign currency gain (loss)				(426	)		(844	)
	Total foreign currency derivatives				$		155		$	(1,538	)
	CRS		Revaluation of derivatives		$		(364	)	$	1,895
	Commodity derivatives		Revaluation of derivatives		$		—		$	—
	Interest Rate Swap		Interest Expense		$		8		$	8
			Other Comprehensive Income		$		30		$	105
			Location		Three				Nine
					Months Ended				Months Ended
					September 30,				September 30,
					2012				2012
	Foreign currency derivatives		Revaluation of derivatives		$		(2,036	)	$	(2,514	)
			Foreign currency gain (loss)				1,051			1,722
	Total foreign currency derivatives				$		(985	)	$	(792	)
	CRS		Revaluation of derivatives		$		1,045		$	1,315
	Commodity derivatives		Revaluation of derivatives		$		(2	)	$	143
	Interest Rate Swap		Interest Expense		$		(12	)	$	(54	)
			Other Comprehensive Income		$		(25	)	$	(55	)

The_Company_and_Subsequent_Eve1

The Company and Subsequent Event - Additional Information (Detail)	1 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Feb. 22, 2013	Feb. 22, 2013	Sep. 30, 2013	Sep. 30, 2013	Oct. 31, 2013	Sep. 30, 2013	Sep. 30, 2013	Feb. 22, 2013
	USD ($)	EUR (€)	W.E.T. Bank of America credit facility	W.E.T. Bank of America credit facility	W.E.T. Bank of America credit facility	W.E.T. Bank of America credit facility	WET	WET
			USD ($)	EUR (€)	Subsequent Event	Minimum	Historical Gentherm	Historical Gentherm
					EUR (€)
Nature Of Company [Line Items]	'	'	'	'	'	'	'	'
Business Acquisition, shares acquired	'	'	'	'	'	'	309,537	442,253
Business Acquisition, percentage of shares acquired	'	'	'	'	'	'	'	14.00%
Business Acquisition, shares issued for acquisition	3,300,000	3,300,000	'	'	'	'	'	'
Business Acquisition, cash paid	$7,247	€ 5,408	$26,311	€ 35,256	'	'	'	'
Business Acquisition, percentage of shares acquired	'	'	'	'	100.00%	99.00%	'	'
Business Acquisition, purchase price per share	'	'	'	€ 85	€ 90.05	'	'	'
Business Acquisition cost of acquisition, financed by borrowings	'	'	$40,441	'	'	'	'	'

Earnings_per_Share_Detail

Earnings per Share (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Weighted average number of shares for calculation of basic EPS – Common Stock	34,447,098	29,618,964	33,261,115	28,177,182
Impact of stock options outstanding under the 1997, 2006 and 2011 Stock Option Plans	439,364	384,383	323,111	498,461
Weighted average number of shares – diluted	34,886,462	30,003,347	33,584,226	28,675,643
Common stock that have been excluded from the diluted shares calculation	500,000	2,676,877	508,000	2,676,877
Stock options outstanding under the 2006, 2011 and 2013 Stock Option Plans	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Common stock that have been excluded from the diluted shares calculation	500,000	584,586	508,000	584,586
Series C Convertible Preferred Stock	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Common stock that have been excluded from the diluted shares calculation	'	2,092,291	'	2,092,291

Segment_Information_about_Repo

Segment Information about Reported Product Revenues and Operating Income (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]	'	'	'	'
Product revenues	$171,182	$141,058	$479,792	$406,737
Depreciation and amortization	7,737	7,445	23,467	22,737
Operating income (loss)	14,554	10,038	32,764	27,089
CCS	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Product revenues	37,697	33,966	103,460	96,117
Depreciation and amortization	437	329	1,115	787
Operating income (loss)	11,152	9,328	28,953	25,037
Advanced Technology	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Depreciation and amortization	117	82	344	388
Operating income (loss)	-1,544	-1,631	-5,174	-5,260
W.E.T.	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Product revenues	133,485	107,092	376,332	310,620
Depreciation and amortization	6,870	6,692	21,143	20,697
Operating income (loss)	11,297	8,249	28,407	22,274
Reconciling Items	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Depreciation and amortization	313	342	865	865
Operating income (loss)	($6,351)	($5,908)	($19,422)	($14,962)

Segment_Reporting_Detail

Segment Reporting (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	$171,182	$141,058	$479,792	$406,737
Total product revenues in percentage	100.00%	100.00%	100.00%	100.00%
United States	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	76,543	60,012	211,462	173,233
Total product revenues in percentage	45.00%	42.00%	44.00%	43.00%
Germany	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	20,847	17,773	61,332	49,405
Total product revenues in percentage	12.00%	13.00%	13.00%	12.00%
China	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	18,285	15,694	47,972	43,510
Total product revenues in percentage	11.00%	11.00%	10.00%	11.00%
South Korea	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	13,546	10,716	39,069	31,213
Total product revenues in percentage	8.00%	8.00%	8.00%	8.00%
Japan	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	10,281	10,294	28,591	24,014
Total product revenues in percentage	6.00%	7.00%	6.00%	6.00%
United Kingdom	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	5,180	3,407	13,319	12,959
Total product revenues in percentage	3.00%	2.00%	3.00%	3.00%
Mexico	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	4,230	3,581	11,696	11,467
Total product revenues in percentage	2.00%	3.00%	2.00%	3.00%
Czech Republic	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	4,114	4,375	11,893	12,102
Total product revenues in percentage	2.00%	3.00%	3.00%	3.00%
Canada	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	3,432	2,782	10,533	9,527
Total product revenues in percentage	2.00%	2.00%	2.00%	2.00%
Other	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Total product revenues	$14,724	$12,424	$43,925	$39,307
Total product revenues in percentage	9.00%	9.00%	9.00%	10.00%

Segment_Reporting_Additional_I

Segment Reporting - Additional Information (Detail) (Advanced Technology, USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Advanced Technology	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Reimbursed research and development costs	$375	$656	$1,597	$1,763

Series_C_Convertible_Preferred2

Series C Convertible Preferred Stock - Additional Information (Detail) (Series C Convertible Preferred Stock, USD $)	1 Months Ended		2 Months Ended	3 Months Ended	9 Months Ended
	31-May-13	Mar. 31, 2011	Aug. 31, 2013	Mar. 31, 2013	Sep. 30, 2013
					Installment
Series C Convertible Preferred Stock	'	'	'	'	'
Preferred Stock [Line Items]	'	'	'	'	'
Preferred shares issued	'	7,000	'	'	'
Initial stated value per preferred share	'	$10,000	'	'	'
Net proceeds from sale of shares	'	$64,013,000	'	'	'
Agent fees and offering costs	'	5,987,000	'	'	'
Percentage of dividend payable	'	'	'	'	8.00%
Number of equal quarterly installments	'	'	'	'	9
Installments start date	'	'	'	'	1-Sep-11
Installments end date	'	'	'	'	1-Sep-13
Preferred share plus accumulated and unpaid dividends	'	'	'	'	$10,000
Conversion price of convertible preference stock	$15.83	'	$15.83	$15.83	'
Conversion share of convertible preference stock	650	'	'	165	'
Issuance of common stock related to conversion of preferred stock	418,000	'	432,000	105,000	'

Series_C_Convertible_Preferred3

Series C Convertible Preferred Stock Installments (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Class Of Stock [Line Items]	'
Dividend, installment payments	$696
Principal, installment payments	8,446
Total, installment payments	$9,142

Debt_Additional_Information_De

Debt - Additional Information (Detail)

9 Months Ended

9 Months Ended

9 Months Ended

1 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2013

Feb. 28, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

USD ($)

EUR (€)

Europe Term Note

W.E.T. Bank of America credit facility

W.E.T. Bank of America credit facility

Eurocurrency Rate Loans

Eurocurrency Rate Loans

Eurocurrency Rate Loans

Federal Funds Rate

Federal Funds Rate

US Bank of America credit facility

Base Rate Loans

Bank of China

Bank of China

German Investment Corporation

German Investment Corporation

German Investment Corporation

USD ($)

Minimum

Minimum

Maximum

Minimum

Maximum

Maximum

USD ($)

CNY

USD ($)

EUR (€)

Euro Swap Rate

Debt Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amortization of credit facility percentage year one

10.00%

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amortization of credit facility percentage year two

12.50%

12.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amortization of credit facility percentage year three

15.00%

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amortization of credit facility percentage year four

17.50%

17.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amortization of credit facility percentage year five

10.00%

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Quarterly principal payments

'

'

'

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit facility due date

30-Mar-16

30-Mar-16

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, description

'The Company has the option to elect interest rates based on either a Eurocurrency (LIBOR or EURIBOR) rate (“Eurocurrency Rate Loans”) (0.17% – 0.45% at September 30, 2013) or a base rate (“Base Rate Loans”) plus a margin (“Applicable Rate”), which varies based on the Consolidated Leverage Ratio of the Company, as defined by the US and W.E.T. Bank of America credit agreements.

'The Company has the option to elect interest rates based on either a Eurocurrency (LIBOR or EURIBOR) rate (“Eurocurrency Rate Loans”) (0.17% – 0.45% at September 30, 2013) or a base rate (“Base Rate Loans”) plus a margin (“Applicable Rate”), which varies based on the Consolidated Leverage Ratio of the Company, as defined by the US and W.E.T. Bank of America credit agreements.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate

'

'

'

'

1.00%

2.25%

0.20%

0.40%

0.06%

0.50%

3.25%

1.25%

'

'

4.25%

4.25%

3.00%

Amount of draw on europe term note

'

'

$40,441

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument face amount

'

'

'

'

'

'

'

'

'

'

'

'

3,159

20,000

'

'

'

Fixed interest rate

'

'

'

'

'

'

'

'

'

'

'

'

6.90%

6.90%

'

'

'

Initial amount drawn from German Investment Corporation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,601

2,000

'

Line of credit facility

29,550

20,000

'

'

'

'

'

'

'

'

'

'

'

'

2,701

2,000

'

Spread variable interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.25%

Outstanding letter of credit

$450

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Summary_of_Companys_debt_Detai

Summary of Company's debt (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]	'	'
Total debt	$87,434	$56,952
Current portion	-22,164	-17,218
Long-term debt, less current maturities	65,270	39,734
US Term Note	'	'
Debt Instrument [Line Items]	'	'
Interest Rate	2.50%	'
Total debt	25,813	29,312
Europe Term Note	'	'
Debt Instrument [Line Items]	'	'
Interest Rate	2.50%	'
Total debt	40,507	4,476
W.E.T. Term Note	'	'
Debt Instrument [Line Items]	'	'
Interest Rate	2.00%	'
Total debt	12,897	18,852
German Investment Corporation	'	'
Debt Instrument [Line Items]	'	'
Interest Rate	4.25%	'
Total debt	5,403	'
Capital Lease Obligations	'	'
Debt Instrument [Line Items]	'	'
Interest Rate	4.20%	'
Total debt	2,814	1,140
Bank of China	'	'
Debt Instrument [Line Items]	'	'
Total debt	'	$3,172

Information_Related_to_Recurri

Information Related to Recurring Fair Value Measurement of Derivative Instruments (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Derivative Asset Fair Value Net	'
Asset Derivatives, Fair Value, Total	$2,695
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives	'
Derivative Liability Fair Value Net	'
Net Asset/(Liabilities)	2,638
Fair Value, Inputs, Level 2 | Foreign Currency Derivatives | Noncurrent Assets	'
Derivative Asset Fair Value Net	'
Asset Derivatives, Fair Value, Total	2,403
Fair Value, Inputs, Level 2 | Currency Related Swap | Noncurrent Liabilities	'
Derivative Liability Fair Value Net	'
Net Asset/(Liabilities)	-12,029
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives	'
Derivative Liability Fair Value Net	'
Liability Derivatives, Fair value	-57
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Current Assets	'
Derivative Liability Fair Value Net	'
Net Asset/(Liabilities)	289
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Noncurrent Assets	'
Derivative Liability Fair Value Net	'
Net Asset/(Liabilities)	2,403
Fair Value, Inputs, Level 2 | Not a hedge | Foreign Currency Derivatives | Current Liabilities	'
Derivative Liability Fair Value Net	'
Liability Derivatives, Fair value	-57
Net Asset/(Liabilities)	-54
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap	'
Derivative Liability Fair Value Net	'
Liability Derivatives, Fair value	-12,029
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap | Current Liabilities	'
Derivative Liability Fair Value Net	'
Liability Derivatives, Fair value	-2,476
Fair Value, Inputs, Level 2 | Not a hedge | Currency Related Swap | Noncurrent Liabilities	'
Derivative Liability Fair Value Net	'
Liability Derivatives, Fair value	-9,553
Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest Rate Swap | Current Liabilities	'
Derivative Liability Fair Value Net	'
Liability Derivatives, Fair value	-119
Net Asset/(Liabilities)	-119
Fair Value, Inputs, Level 2 | Contract One | Not a hedge | Foreign Currency Derivatives | Current Assets	'
Derivative Asset Fair Value Net	'
Asset Derivatives, Fair Value, Total	3
Fair Value, Inputs, Level 2 | Contract Two | Not a hedge | Foreign Currency Derivatives | Current Assets	'
Derivative Asset Fair Value Net	'
Asset Derivatives, Fair Value, Total	$289

Information_Relate_to_Effect_o

Information Relate to Effect of Derivative Instruments on Our Consolidated Income Statements (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gain (loss) on derivatives	$155	($985)	($1,538)	($792)
Revaluation Of Derivatives | Foreign Currency Derivatives	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gain (loss) on derivatives	581	-2,036	-694	-2,514
Revaluation Of Derivatives | Currency Related Swap	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gain (loss) on derivatives	-364	1,045	1,895	1,315
Revaluation Of Derivatives | Commodity derivatives	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gain (loss) on derivatives	'	-2	'	143
Foreign Currency Gain (Loss) | Foreign Currency Derivatives	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gain (loss) on derivatives	-426	1,051	-844	1,722
Interest Expense | Interest Rate Swap	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gain (loss) on derivatives	8	-12	8	-54
Other Comprehensive Income (Loss)	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gain (loss) on derivatives	$30	($25)	$105	($55)

Derivative_Financial_Instrumen2

Derivative Financial Instruments - Additional Information (Detail)	9 Months Ended	1 Months Ended			1 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2008	Sep. 30, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Sep. 30, 2013
	W.E.T.	W.E.T.	W.E.T.	W.E.T.	Unicredit Bank	Unicredit Bank	Unicredit Bank
		Interest Rate Swap	Interest Rate Swap	Interest Rate Swap	EUR (€)	USD ($)	EUR (€)
			USD ($)	EUR (€)
Derivative Instruments [Line Items]	'	'	'	'	'	'	'
Derivative maturity period	'	'10 years	'	'	'	'	'
Derivative notional amount	'	'	$13,508	€ 10,000	'	'	'
Derivative variable rate basis	'six month EURIBOR	'	'	'	'	'	'
Fixed interest rate	0.45%	'	'	'	'	'	'
Basis spread on variable rate	1.40%	'	'	'	'	'	'
Exchange rate	1.23	'	'	'	'	'	'
Derivative exchange rate	1.46	'	'	'	'	'	'
Legal settlement for CRS	'	'	'	'	144	'	'
Costs of all future obligations under CRS	'	'	'	'	'	12,030	8,906
Past due payments under CRS	'	'	'	'	'	$6,659	€ 4,930