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Goodwill and Other Intangible Assets (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill gross, Beginning balance | $ 64,612,000 |  | $ 39,925,000 |  |
Goodwill accumulated impairment loss, Beginning balance | (38,488,000) |  | (38,488,000) |  |
Goodwill net, Beginning balance | 26,124,000 |  | 1,437,000 |  |
Goodwill gross, Ending balance | 74,315,000 |  | 64,612,000 |  | 39,925,000
Goodwill accumulated impairment loss, Ending balance | (38,488,000) |  | (38,488,000) |  | (38,488,000)
Goodwill net, Ending balance | 35,827,000 |  | 26,124,000 |  | 1,437,000
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Total acquired intangible assets | 48,693,000 |  | 39,823,000 |  |
Less accumulated amortization | (14,210,000) | [1] | (9,467,000) | [1] |
Net acquired intangible assets | 34,483,000 |  | 30,356,000 |  |
Amortization of acquired intangible assets [Abstract] |  |  |  |  |
Amortization expense | 4,700,000 |  | 2,100,000 |  | 1,200,000
Estimated amortization expense in year 2013 | 4,700,000 |  |  |  |
Estimated amortization expense in year 2014 | 4,100,000 |  |  |  |
Estimated amortization expense in year 2015 | 3,900,000 |  |  |  |
Estimated amortization expense in years 2016 through 2028 | 16,600,000 |  |  |  |
Other intangible assets | 17,300,000 |  | 16,100,000 |  |
Accumulated computer software amortization | 15,200,000 |  | 14,700,000 |  |
Customer Relationships [Member] |  |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Total acquired intangible assets | 40,100,000 |  | 32,100,000 |  |
Trademarks and Trade Names [Member] |  |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Total acquired intangible assets | 6,800,000 |  | 6,300,000 |  |
Non-compete Agreements [Member] |  |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Total acquired intangible assets | 910,000 |  | 700,000 |  |
Patents and Supply Contracts [Member] |  |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Total acquired intangible assets | 723,000 |  | 723,000 |  |
Leaseholds [Member] |  |  |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Total acquired intangible assets | 160,000 |  | 0 |  |
Computer Software [Member] |  |  |  |  |
Amortization of acquired intangible assets [Abstract] |  |  |  |  |
Amortization of computer software | 500,000 |  | 700,000 |  | 1,100,000
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 |  |  |  |
Dana Acquisition [Member] | Trademarks and Trade Names [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired indefinite-lived intangible assets | 5,200,000 |  |  |  |
BLD Products, Ltd [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period |  |  | 12,867,000 |  |
Purchase price paid in cash | 26,984,000 |  | 27,000,000 |  |
BLD Products, Ltd [Member] | Customer Relationships [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets |  |  | 7,200,000 |  |
Estimated useful life of intangible assets | 10 years |  | 10 years |  |
Forecast Trading Corporation [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period |  |  | 11,820,000 |  |
Purchase price paid in cash | 44,250,000 |  | 44,300,000 |  |
Forecast Trading Corporation [Member] | Customer Relationships [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets |  |  | 13,800,000 |  |
Forecast Trading Corporation [Member] | Customer Relationships [Member] | Minimum [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Estimated useful life of intangible assets | 7 years |  | 7 years |  |
Forecast Trading Corporation [Member] | Customer Relationships [Member] | Maximum [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Estimated useful life of intangible assets | 10 years |  | 10 years |  |
Forecast Trading Corporation [Member] | Trademarks and Trade Names [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets |  |  | 800,000 |  |
Estimated useful life of intangible assets |  |  | 10 years |  |
Forecast Trading Corporation [Member] | Non-compete Agreements [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets |  |  | 700,000 |  |
Estimated useful life of intangible assets | 5 years |  | 5 years |  |
CompressorWorks, Inc. [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period | 9,703,000 |  |  |  |
Purchase price paid in cash | 38,594,000 |  |  |  |
Purchase price excluding working capital adjustment | 37,400,000 |  |  |  |
Working capital adjustment | 1,200,000 |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets | 8,900,000 |  |  |  |
CompressorWorks, Inc. [Member] | Customer Relationships [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets | 8,000,000 |  |  |  |
Estimated useful life of intangible assets | 7 years |  |  |  |
CompressorWorks, Inc. [Member] | Trademarks and Trade Names [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets | 500,000 |  |  |  |
Estimated useful life of intangible assets | 3 years |  |  |  |
CompressorWorks, Inc. [Member] | Non-compete Agreements [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets | 200,000 |  |  |  |
Estimated useful life of intangible assets | 3 years |  |  |  |
CompressorWorks, Inc. [Member] | Leaseholds [Member] |  |  |  |  |
Intangible assets acquired [Abstract] |  |  |  |  |
Amount of acquired intangible assets | 200,000 |  |  |  |
Estimated useful life of intangible assets | 2 years 3 months 18 days |  |  |  |
Engine Management [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Percentage in excess of its carrying amount (in hundredths) | 70.00% |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill gross, Ending balance | 64,612,000 |  | 64,612,000 |  | 39,925,000
Goodwill accumulated impairment loss, Ending balance | (38,488,000) |  | (38,488,000) |  | (38,488,000)
Goodwill net, Ending balance | 26,124,000 |  | 26,124,000 |  | 1,437,000
Engine Management [Member] | BLD Products, Ltd [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period |  |  | 12,867,000 |  |
Engine Management [Member] | Forecast Trading Corporation [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period |  |  | 11,820,000 |  |
Engine Management [Member] | CompressorWorks, Inc. [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period | 0 |  |  |  |
Temperature Control [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Percentage in excess of its carrying amount (in hundredths) | 60.00% |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill gross, Ending balance | 9,703,000 |  | 0 |  | 0
Goodwill accumulated impairment loss, Ending balance | 0 |  | 0 |  | 0
Goodwill net, Ending balance | 9,703,000 |  | 0 |  | 0
Temperature Control [Member] | BLD Products, Ltd [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period |  |  | 0 |  |
Temperature Control [Member] | Forecast Trading Corporation [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period |  |  | 0 |  |
Temperature Control [Member] | CompressorWorks, Inc. [Member] |  |  |  |  |
Goodwill by operating segment [Abstract] |  |  |  |  |
Goodwill acquired during period | $ 9,703,000 |  |  |  |
[1] | Applies to all intangible assets, except for the Dana acquisition related trademarks and trade names totaling $5.2 million, which have indefinite useful lives and, as such, are not being amortized.

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