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Segment Reporting (Schedule Of Information Relating To Segments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Segment Reporting Information |  |  |  |
Net sales | $ 547,483 | $ 440,831 | $ 1,045,819 | $ 863,629
Operating profit | 63,040 | 59,388 | 122,169 | 115,116
Travel Trailer And Fifth-Wheels |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 357,251 | 289,686 | 687,525 | 573,055
Motorhomes |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 36,248 | 27,866 | 73,292 | 56,389
Adjacent Industries OEMs |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 109,276 | 89,364 | 203,987 | 170,125
Operating Segments | OEM Segment |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 502,775 | 406,916 | 964,804 | 799,569
Operating profit | 56,445 | 54,402 | 110,842 | 105,053
Operating Segments | Aftermarket Segment |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 44,708 | 33,915 | 81,015 | 64,060
Operating profit | $ 6,595 | $ 4,986 | $ 11,327 | $ 10,063

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