CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Income Statement [Abstract]
Net Sales	$ 216,898		$ 219,794		$ 631,796		$ 637,473
Cost of sales	144,559		145,578		425,949		425,798
Gross profit	72,339		74,216		205,847		211,675
Selling, general, and administrative expenses	55,288		50,694		166,094		151,899
Operating profit	17,051	[1]	23,522	[1]	39,753	[1]	59,776	[1]
Interest expense	1,484		1,635		4,496		4,778
Other expense (income), net	2,224		2,786		(1,273)		3,723
Income before income tax expense	13,343		19,101		36,530		51,275
Income tax expense	4,793		6,904		14,018		18,766
Net income	8,550		12,197		22,512		32,509
Net earnings per share:
Basic (in dollars per share)	$ 0.18		$ 0.26		$ 0.48		$ 0.70
Diluted (in dollars per share)	$ 0.18		$ 0.26		$ 0.47		$ 0.69
Dividends per share (in dollars per share)	$ 0.12		$ 0.12		$ 0.36		$ 0.32
Weighted-average number of common shares outstanding:
Basic	46,915,660		46,667,359		46,882,362		46,595,066
Diluted	47,679,422		47,038,785		47,615,305		47,051,004
Net income	8,550		12,197		22,512		32,509
Other comprehensive income (loss)
Foreign currency translation adjustment	4,047		4,586		(3,164)		2,076
Pension and other post-retirement liability adjustment, net of tax	913		0		2,782		0
Total other comprehensive income (loss), net of tax	4,960		4,586		(382)		2,076
Total comprehensive income	$ 13,510		$ 16,783		$ 22,130		$ 34,585

[1] The Company does not allocate interest expense or other expense (income), net to the reportable segments.