Consolidated Condensed Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 17,288	$ 8,765	$ 50,290	$ 24,202
Other comprehensive income (loss), gross of tax:
Foreign currency translation adjustments	(13,178)	8,642	(16,533)	1,848
Unrealized gain on derivative securities	(529)	30	(330)	105
Other comprehensive income (loss), gross of tax	(13,707)	8,672	(16,863)	1,953
Other comprehensive income (loss), related tax effect:
Foreign currency translation adjustments	8	(88)	862	(197)
Other comprehensive income (loss), related tax effect	8	(88)	862	(197)
Other comprehensive income (loss), net of tax	(13,699)	8,584	(16,001)	1,756
Comprehensive income	3,589	17,349	34,289	25,958
Less: comprehensive income (loss) attributable to the non-controlling interest		(104)		1,173
Comprehensive income attributable to Gentherm Incorporated	$ 3,589	$ 17,453	$ 34,289	$ 24,785