CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Sales	$ 922,200	$ 809,467	$ 780,033
Cost of sales	627,803	545,118	510,590
Gross profit	294,397	264,349	269,443
Selling, general, and administrative expenses	202,075	192,460	195,058
Restructuring and other charges	696	7,565	11,959
Curtailment benefit	5,445	338	1,063
Operating income	97,071	64,662	63,489
Interest expense	9,753	17,436	13,862
Other income (expense), net	1,508	(6,379)	(5,832)
Income before income tax expense	88,826	40,847	43,795
Income tax expense	30,815	12,823	16,442
Net income	$ 58,011	$ 28,024	$ 27,353
Earnings per share
Basic (in dollars per share)	$ 1.25	$ 0.61	$ 0.60
Diluted (in dollars per share)	$ 1.24	$ 0.61	$ 0.60
Weighted-average shares outstanding:
Basic (in shares)	46,249,571	45,600,043	45,403,401
Diluted (in shares)	46,835,712	45,970,680	45,413,770