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Gentherm Global Power Technologies - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Apr. 01, 2014
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2013
Business Acquisition [Line Items]        
Goodwill   $ 30,398 $ 27,765 $ 25,809
Global Thermoelectric Inc        
Business Acquisition [Line Items]        
Product revenues   24,235    
Operating Income   776    
Net assets acquired $ 30,866      
Cash acquired on acquisition 2,954      
Goodwill 6,365      
Intangible assets before foreign currency adjustment $ 9,871      
Decrease in intangible assets, net of accumulated amortization, fluctuations in foreign currency exchange rates   465    
Amortization of intangibles   $ 1,962