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v3.20.1

Segment Reporting (Schedule of Operating Profit by Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information |  |
Operating profit | $ 44,266 | $ 47,755
Operating Segments | OEM Segment |  |
Segment Reporting Information |  |
Operating profit | 43,189 | 40,408
Operating Segments | Aftermarket Segment |  |
Segment Reporting Information |  |
Operating profit | $ 1,077 | $ 7,347

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