Segment Reporting (Schedule Of Information Relating To Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information
Total net sales	$ 321,783	$ 287,192	$ 607,160	$ 539,778
Operating Income (Loss)	29,149	25,708	55,195	39,296
RV Segment
Segment Reporting Information
Total net sales	289,826	253,066	548,862	477,069
Operating Income (Loss)	28,032	22,600	51,761	34,864
Travel Trailer And Fifth-Wheels
Segment Reporting Information
Total net sales	235,286	207,849	447,416	392,450
Motorhomes
Segment Reporting Information
Total net sales	15,673	11,939	30,057	22,890
RV Aftermarket
Segment Reporting Information
Total net sales	9,668	7,152	16,762	12,881
Adjacent Industries
Segment Reporting Information
Total net sales	29,199	26,126	54,627	48,848
MH Segment
Segment Reporting Information
Total net sales	31,957	34,126	58,298	62,709
Operating Income (Loss)	3,071	3,841	5,388	6,308
Manufactured Housing OEMs
Segment Reporting Information
Total net sales	20,764	22,591	37,281	40,370
Manufactured Housing Aftermarket
Segment Reporting Information
Total net sales	3,705	3,587	7,172	7,239
Adjacent Industries
Segment Reporting Information
Total net sales	7,488	7,948	13,845	15,100
Total Segment Operating Profit
Segment Reporting Information
Operating Income (Loss)	31,103	26,441	57,149	41,172
Sale Of Extrusion Assets
Segment Reporting Information
Operating Income (Loss)	(1,954)	0	(1,954)	0
Executive Succession
Segment Reporting Information
Operating Income (Loss)	$ 0	$ (733)	$ 0	$ (1,876)