Consolidated Condensed Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Consolidated Condensed Statements of Operations [Abstract]
Product revenues	$ 141,058	$ 125,639	$ 406,737	$ 238,572
Cost of sales	104,258	94,795	303,275	177,671
Gross margin	36,800	30,844	103,462	60,901
Operating expenses:
Research and development	10,702	11,520	31,480	18,921
Research and development reimbursements	(656)	(235)	(1,763)	(581)
Net research and development expenses	10,046	11,285	29,717	18,340
Acquisition transaction expenses		200		5,380
Selling, general and administrative	16,560	13,545	45,972	26,092
Total operating expenses	26,606	25,030	75,689	49,812
Operating income	10,194	5,814	27,773	11,089
Interest expense	(898)	(1,213)	(3,082)	(2,450)
Debt retirement expense		(3)		(970)
Revaluation of derivatives	(993)	(4,305)	(1,056)	(5,574)
Foreign currency gain (loss)	(421)	2,006	2,357	3,412
Other income	313	193	631	281
Earnings before income tax	8,195	2,492	26,623	5,788
Income tax expense	2,425	973	7,580	4,117
Net income	5,770	1,519	19,043	1,671
Loss(gain) attributable to non-controlling interest	(1,672)	(348)	(4,491)	175
Net income attributable to Gentherm Incorporated	4,098	1,171	14,552	1,846
Convertible preferred stock dividends	(1,516)	(2,815)	(5,521)	(5,738)
Net income (loss) attributable to common shareholders	$ 2,582	$ (1,644)	$ 9,031	$ (3,892)
Basic earnings (loss) per share	$ 0.09	$ (0.07)	$ 0.32	$ (0.17)
Diluted earnings (loss) per share	$ 0.09	$ (0.07)	$ 0.31	$ (0.17)
Weighted average number of shares - basic	29,619	22,753	28,177	22,351
Weighted average number of shares - diluted	30,003	22,753	28,676	22,351