Segment Reporting (Schedule of Net Sales by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information
Total net sales	$ 334,228	$ 345,296	$ 362,085	$ 361,457	$ 289,351	$ 294,271	$ 321,783	$ 285,377	$ 1,403,066	$ 1,190,782	$ 1,015,576	[1]
Travel Trailer and Fifth Wheels
Segment Reporting Information
Total net sales									938,787	841,497	727,783
Motorhomes
Segment Reporting Information
Total net sales									86,513	70,332	47,937
RV Aftermarket
Segment Reporting Information
Total net sales									87,447	49,570	25,334
RV Adjacent Industries
Segment Reporting Information
Total net sales									172,181	113,049	92,640
RV Segment
Segment Reporting Information
Total net sales									1,284,928	1,074,448	893,694	[1]
Manufactured Housing OEMs
Segment Reporting Information
Total net sales									82,032	77,421	80,245
Manufactured Housing Aftermarket
Segment Reporting Information
Total net sales									15,559	14,186	13,719
Manufactured Housing Adjacent Industries
Segment Reporting Information
Total net sales									20,547	24,727	27,918
MH Segment
Segment Reporting Information
Total net sales									$ 118,138	$ 116,334	$ 121,882	[1]

[1] (a) Thor Industries, Inc., a customer of the RV Segment, accounted for 29 percent, 33 percent and 34 percent of the Company’s consolidated net sales for the years ended December 31, 2015, 2014 and 2013, respectively. Berkshire Hathaway Inc. (through its subsidiaries Forest River, Inc. and Clayton Homes, Inc.), a customer of both segments, accounted for 26 percent, 28 percent and 28 percent of the Company’s consolidated net sales for the years ended December 31, 2015, 2014 and 2013, respectively. Jayco, Inc., a customer of the RV Segment, accounted for 10 percent of the Company's consolidated net sales for the year ended December 31, 2015. No other customer accounted for more than 10 percent of consolidated net sales in the years ended December 31, 2015, 2014 and 2013.