Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net sales	$ 460,730	$ 455,293	$ 460,626
Cost of sales	303,480	293,009	282,994
Gross profit	157,250	162,284	177,632
Selling, general, and administrative expenses	132,795	122,031	121,734
Multiemployer pension withdrawal expense (income)	31,480	1,846	(200)
Business and systems integration expenses	12,086	8,467	1,294
Acquisition integration and restructuring expenses	5,370	1,470	2,244
Impairment of long-lived assets	4,356	40	688
Foreign exchange loss	1,823	1,112	2,306
Operating income (loss)	(30,660)	27,318	49,566
Other income (expense):
Interest income	129	59	39
Interest expense	(3,652)	(5,270)	(7,201)
Income (loss) before income taxes	(34,183)	22,107	42,404
Income tax provision (benefit)	(10,767)	1,496	9,984
Net income (loss)	(23,416)	20,611	32,420
Earnings per share:
Basic (in dollars per share)	$ (0.9)	$ 0.80	$ 1.27
Diluted (in dollars per share)	$ (0.9)	$ 0.79	$ 1.25
Weighted average number of common and common equivalent shares outstanding:
Basic (in shares)	25,924	25,790	25,465
Diluted (in shares)	25,924	26,080	25,883
Dividends per Class A common share (in dollars per share)	$ 0.32	$ 0.32	$ 0.20
Net Income (loss)	(23,416)	20,611	32,420
Foreign currency translation adjustments	2,779	(2,167)	3,443
Comprehensive income Loss	$ (20,637)	$ 18,444	$ 35,863