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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 |  |

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