CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Sales	$ 887,499	$ 922,200	$ 809,467
Cost of sales	593,149	627,803	545,118
Gross profit	294,350	294,397	264,349
Selling, general, and administrative expenses	206,449	202,075	192,460
Restructuring and other charges		696	7,565
Curtailment benefit		5,445	338
Operating profit	87,901	97,071	64,662
Interest expense	6,350	9,753	17,436
Other (income) expense, net	3,215	(1,508)	6,379
Income before income tax expense	78,336	88,826	40,847
Income tax expense	28,335	30,815	12,823
Net income	50,001	58,011	28,024
Earnings per share:
Basic (in dollars per share)	$ 1.07	$ 1.25	$ 0.61
Diluted (in dollars per share)	$ 1.06	$ 1.24	$ 0.61
Weighted-average shares of common stock outstanding:
Basic (in shares)	46,634,834	46,249,571	45,600,043
Diluted (in shares)	47,059,186	46,835,712	45,970,680
Net income	50,001	58,011	28,024
Other comprehensive income (loss)
Pension and other post-retirement liability adjustment, net of tax	(12,358)	(11,439)	2,259
Foreign currency translation adjustment	1,981	(2,525)	(315)
Change in the fair value of interest rate swap contracts, net of tax		2,622	5,122
Total other comprehensive income (loss)	(10,377)	(11,342)	7,066
Total comprehensive income	$ 39,624	$ 46,669	$ 35,090