Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Product revenues	$ 554,979	$ 369,588	$ 112,403
Cost of sales	413,052	274,621	79,648
Gross margin	141,927	94,967	32,755
Operating costs and expenses:
Research and development expenses	43,189	30,665	12,712
Reimbursed research and development expenses	(2,239)	(932)	(2,269)
Net research and development expenses	40,950	29,733	10,443
Acquisition transaction expenses		5,316
Selling, general and administrative expenses	64,919	42,110	10,955
Total operating costs and expenses	105,869	77,159	21,398
Operating income	36,058	17,808	11,357
Interest income (expense)	(4,136)	(3,511)	25
Debt retirement expense		(1,160)
Revaluation of derivatives	(2,292)	(6,118)
Foreign currency gain	2,201	9,207
Loss from equity investment	(82)	(243)	(119)
Other income (loss)	923	(114)	145
Earnings before income tax	32,672	15,869	11,408
Income tax expense	8,351	4,666	2,609
Net income	24,321	11,203	8,799
(Income) loss attributable to non-controlling interest	(6,449)	(1,545)	649
Net income attributable to Gentherm, Inc.	17,872	9,658	9,448
Convertible preferred stock dividends	(6,711)	(8,228)
Net income attributable to common shareholders	$ 11,161	$ 1,430	$ 9,448
Basic earnings per share	$ 0.39	$ 0.06	$ 0.44
Diluted earnings per share	$ 0.39	$ 0.06	$ 0.42
Weighted average number of shares - basic	28,352,864	22,605,518	21,716,775
Weighted average number of shares - diluted	28,862,463	23,454,622	22,496,247