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Industry Segments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 Segment | Mar. 31, 2013
Segment Reporting Information [Line Items] |  |
Number of reportable operating segments | 2 |
Net sales | $ 232,752 | $ 230,708
Intersegment revenue | 0 | 0
Operating profit | 20,405 | 16,030
Engine Management [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 179,294 | 175,509
Intersegment revenue | 5,953 | 5,453
Operating profit | 24,372 | 20,784
Temperature Control [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 51,485 | 52,728
Intersegment revenue | 2,234 | 1,509
Operating profit | 613 | (454)
All Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 1,973 | 2,471
Intersegment revenue | (8,187) | (6,962)
Operating profit | $ (4,580) | $ (4,300)

X
- Definition Amount of revenue from transactions with other operating segments of the same entity. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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