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Segment Reporting (Schedule Of Information Relating To Segments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting Information |  |  |  |
Net sales | $ 554,814 | $ 412,370 | $ 1,600,633 | $ 1,275,999
Operating profit | 47,927 | 45,138 | 170,096 | 160,254
Travel Trailer And Fifth-Wheels |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 357,940 | 263,579 | 1,045,465 | 836,634
Motorhomes |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 41,595 | 29,373 | 114,887 | 85,762
Adjacent Industries OEMs |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 106,386 | 82,963 | 310,373 | 253,088
Operating Segments | OEM Segment |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 505,921 | 375,915 | 1,470,725 | 1,175,484
Operating profit | 41,025 | 39,049 | 151,867 | 144,102
Operating Segments | Aftermarket Segment |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 48,893 | 36,455 | 129,908 | 100,515
Operating profit | $ 6,902 | $ 6,089 | $ 18,229 | $ 16,152

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