CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Sales	$ 862,668	$ 887,499	$ 922,200
Cost of sales	582,393	593,149	627,803
Gross profit	280,275	294,350	294,397
Selling, general, and administrative expenses	224,619	206,449	202,075
Restructuring and other charges	5,696	0	696
Intangible asset impairment charge	8,900	0	0
Curtailment gain	0	0	5,445
Operating profit	41,060	87,901	97,071
Interest expense	5,941	6,350	9,753
Other (income) expense, net	3,430	(3,215)	1,508
Income before income tax expense	38,549	78,336	88,826
Income tax expense	15,403	28,335	30,815
Net income	23,146	50,001	58,011
Earnings per share:
Basic (in dollars per share)	$ 0.49	$ 1.07	$ 1.25
Diluted (in dollars per share)	$ 0.49	$ 1.06	$ 1.24
Weighted-average number of common shares outstanding:
Basic (in shares)	46,916,845	46,634,834	46,249,571
Diluted (in shares)	47,659,418	47,059,186	46,835,712
Net income	23,146	50,001	58,011
Other comprehensive income (loss)
Pension and other postretirement liability adjustment, net of tax	36,729	(12,358)	(11,439)
Foreign currency translation adjustment	(5,947)	1,981	(2,525)
Change in fair value of interest rate swap contracts, net of tax	0	0	2,622
Total other comprehensive income (loss), net of tax	30,782	(10,377)	(11,342)
Total comprehensive income	$ 53,928	$ 39,624	$ 46,669