Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements of Income [Abstract]
Net sales	$ 1,793,318	$ 1,613,746	$ 1,539,794
Cost of sales	1,261,728	1,142,484	1,090,070
Gross profit	531,590	471,262	449,724
Selling and administrative expenses	406,523	370,017	361,284
Operating income	125,067	101,245	88,440
Interest expense, net	7,964	6,619	9,667
Income before income taxes and equity earnings (losses)	117,103	94,626	78,773
Provision for income taxes	45,319	37,093	30,957
Equity earnings (losses) in unconsolidated investments, net	209	105	(28,614)
Net income	$ 71,993	$ 57,638	$ 19,202
Earnings per share:
Basic (in dollars per share)	$ 1.49	$ 1.17	$ 0.39
Diluted (in dollars per share)	$ 1.47	$ 1.15	$ 0.39
Weighted average shares outstanding:
Basic (in shares)	48,158	49,469	48,649
Diluted (in shares)	48,987	50,161	49,049
Cash dividends declared per common share (in dollars per share)	$ 0.55	$ 0.52	$ 0.52