Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$ 1,190,782	$ 1,015,576	$ 901,123	[1]
Cost of sales	935,859	802,467	732,464
Gross profit	254,923	213,109	168,659
Selling, general and administrative expenses	157,482	132,935	109,071
Sale of extrusion assets	1,954	0	0
Executive succession	0	1,876	1,456
Operating profit	95,487	78,298	58,132	[2]
Interest expense, net	430	351	330
Income before income taxes	95,057	77,947	57,802
Provision for income taxes	32,791	27,828	20,462
Net income	$ 62,266	$ 50,119	$ 37,340
Net income per common share:
Basic (in usd per share)	$ 2.60	$ 2.15	$ 1.66
Diluted (in usd per share)	$ 2.56	$ 2.11	$ 1.64
Weighted average common shares outstanding:
Basic (in shares)	23,911	23,321	22,558
Diluted (in shares)	24,334	23,753	22,828

[1] (a) Thor Industries, Inc., a customer of the RV Segment, accounted for 33 percent, 34 percent and 37 percent of the Company’s consolidated net sales for the years ended December 31, 2014, 2013 and 2012, respectively. Berkshire Hathaway Inc. (through its subsidiaries Forest River, Inc. and Clayton Homes, Inc.), a customer of both segments, accounted for 28 percent, 28 percent and 27 percent of the Company’s consolidated net sales for the years ended December 31, 2014, 2013 and 2012, respectively. No other customer accounted for more than 10 percent of consolidated net sales in the years ended December 31, 2014, 2013 and 2012.

[2] (b) Certain general and administrative expenses are allocated between the segments based upon net sales or operating profit, depending upon the nature of the expense.