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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill gross, beginning balance |  | $ 93,463 | $ 76,493 |
Goodwill accumulated impairment losses, Beginning balance |  | (38,488) | (38,488) |
Goodwill net, beginning balance |  | 54,975 | 38,005 |
Goodwill foreign currency exchange rate change |  | (94) | (125) |
Goodwill gross, ending balance |  | 93,369 | 93,463 | $ 76,493
Goodwill accumulated impairment losses, Ending balance |  | (38,488) | (38,488) | (38,488)
Goodwill net, ending balance |  | 54,881 | 54,975 | 38,005
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Total acquired intangible assets |  | 57,128 | 57,299 |
Less accumulated amortization | [1] | (29,040) | (24,120) |
Net acquired intangible assets |  | 28,088 | 33,179 |
Amortization of acquired intangible assets [Abstract] |  |  |  |
Amortization expense |  | 4,900 | 5,000 | 5,000
Estimated amortization expense in year 2016 |  | 4,900 |  |
Estimated amortization expense in year 2017 |  | 4,700 |  |
Estimated amortization expense in year 2018 |  | 4,500 |  |
Estimated amortization expense in years 2019 through 2029 |  | 8,800 |  |
Other intangible assets |  | 16,700 | 17,200 |
Accumulated computer software amortization |  | 15,400 | 16,000 |
Pensacola Fuel Injection Inc. [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill net, beginning balance |  | 12,528 |  |
Goodwill acquired during period |  |  | 12,528 |
Goodwill net, ending balance |  |  | 12,528 |
Annex Manufacturing [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill net, beginning balance |  | 4,567 |  |
Goodwill acquired during period |  |  | 4,567 |
Goodwill net, ending balance |  |  | 4,567 |
Engine Management [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill gross, beginning balance |  | 79,193 | 66,790 |
Goodwill accumulated impairment losses, Beginning balance |  | (38,488) | (38,488) |
Goodwill net, beginning balance |  | 40,705 | 28,302 |
Goodwill foreign currency exchange rate change |  | (94) | (125) |
Goodwill gross, ending balance |  | 79,099 | 79,193 | 66,790
Goodwill accumulated impairment losses, Ending balance |  | (38,488) | (38,488) | (38,488)
Goodwill net, ending balance |  | 40,611 | 40,705 | 28,302
Engine Management [Member] | Pensacola Fuel Injection Inc. [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill acquired during period |  |  | 12,528 |
Engine Management [Member] | Annex Manufacturing [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill acquired during period |  |  | 0 |
Temperature Control [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill gross, beginning balance |  | 14,270 | 9,703 |
Goodwill accumulated impairment losses, Beginning balance |  | 0 | 0 |
Goodwill net, beginning balance |  | 14,270 | 9,703 |
Goodwill foreign currency exchange rate change |  | 0 | 0 |
Goodwill gross, ending balance |  | 14,270 | 14,270 | 9,703
Goodwill accumulated impairment losses, Ending balance |  | 0 | 0 | 0
Goodwill net, ending balance |  | 14,270 | 14,270 | 9,703
Temperature Control [Member] | Pensacola Fuel Injection Inc. [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill acquired during period |  |  | 0 |
Temperature Control [Member] | Annex Manufacturing [Member] |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |
Goodwill acquired during period |  |  | 4,567 |
Customer Relationships [Member] |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Total acquired intangible assets |  | 48,475 | $ 48,646 |
Customer Relationships [Member] | Annex Manufacturing [Member] |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |
Estimated useful life of intangible assets |  |  | 7 years |
Trademarks and Trade Names [Member] |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Total acquired intangible assets |  | 6,800 | $ 6,800 |
Intangible assets acquired [Abstract] |  |  |  |
Amount of acquired indefinite-lived intangible assets |  | 5,200 |  |
Non-Compete Agreements [Member] |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Total acquired intangible assets |  | 970 | $ 970 |
Non-Compete Agreements [Member] | Annex Manufacturing [Member] |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |
Estimated useful life of intangible assets |  |  | 5 years |
Patents and Supply Contracts [Member] |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Total acquired intangible assets |  | 723 | $ 723 |
Leaseholds [Member] |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Total acquired intangible assets |  | 160 | 160 |
Computer Software [Member] |  |  |  |
Amortization of acquired intangible assets [Abstract] |  |  |  |
Amortization of computer software |  | $ 600 | $ 500 | $ 600
Computer Software [Member] | Minimum [Member] |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |
Estimated useful life of intangible assets |  | 3 years |  |
Computer Software [Member] | Maximum [Member] |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |
Estimated useful life of intangible assets |  | 10 years |  |
[1] | Applies to all intangible assets, except for trademarks and trade names totaling $5.2 million, which have indefinite useful lives and, as such, are not being amortized.

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