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Segment Information - Sales by Product (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Total sales | $ 932,253 | $ 723,601 | $ 1,848,287 | $ 1,495,632
Specialty Products & Electronics |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 324,798 | 339,188 | 639,863 | 717,457
Transit Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 253,764 | 49,643 | 512,182 | 98,438
Brake Products |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 192,557 | 141,979 | 373,016 | 293,885
Remanufacturing, Overhaul & Build |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | 126,556 | 156,981 | 255,616 | 315,014
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total sales | $ 34,578 | $ 35,810 | $ 67,610 | $ 70,838

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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=63488584&loc=d3e20235-122688 + Details
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