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Industry Segments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 Segment | Mar. 31, 2012
Segment Reporting Information [Line Items] |  |
Number of reportable operating segments | 2 |
Net sales | $ 230,708 | $ 211,711
Intersegment revenue | 0 | 0
Operating profit | 16,030 | 9,703
Engine Management [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 175,509 | 163,015
Intersegment revenue | 5,453 | 4,488
Operating profit | 20,784 | 13,688
Temperature Control [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 52,728 | 45,291
Intersegment revenue | 1,509 | 1,109
Operating profit | (454) | 48
All Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 2,471 | 3,405
Intersegment revenue | (6,962) | (5,597)
Operating profit | $ (4,300) | $ (4,033)

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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 Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + 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=6880815&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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- Definition Amount of revenue from transactions with other operating segments of the same entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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