Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended											12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Significant Accounting Policies [Abstract]
Percentage of LIFO cost basis inventory (in hundredths)	19.00%					19.00%						19.00%	19.00%
Finite-Lived Intangible Assets [Line Items]
Amortization period of computer software and licenses												13 years	12 years 4 months 24 days
Impairments related to long-lived assets	$ 75	[1]	$ 4,281	$ 0	$ 0	$ 40	[2]	$ 0	[3]	$ 0	$ 0	$ 4,356	$ 40	$ 688
Period of purchase from suppliers as basis for volume discounts												1 year
Fair value of financial instruments [Abstract]
Fair value of fixed-rate notes payable	30,392					25,263						30,392	25,263
Carrying value of fixed-rate notes payable	29,301					24,580						29,301	24,580
Changes in fair value of contingent consideration [Roll Forward]
Liability balance, beginning of period					239							239
Accretion of present value discount												6
Revaluation of estimated liability												(245)
Liability balance, end of period	0					239						0	239
Other long-term liabilities [Abstract]
Multiemployer pension withdrawal liability	31,683											31,683
Level 1 [Member]
Other long-term liabilities [Abstract]
Multiemployer pension withdrawal liability	0											0
Level 2 [Member]
Other long-term liabilities [Abstract]
Multiemployer pension withdrawal liability	0											0
Level 3 [Member]
Other long-term liabilities [Abstract]
Multiemployer pension withdrawal liability	$ 31,683											$ 31,683
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (in years)												3Y
Finite-Lived Intangible Assets [Line Items]
Amortization period of computer software and licenses												3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives (in years)												30Y
Finite-Lived Intangible Assets [Line Items]
Amortization period of computer software and licenses												7 years

[1] Results for the fourth quarter of 2012 were unfavorably impacted by the Company's decision to withdraw from the Graphic Communications Conference International Brotherhood of Teamsters National Pension Fund. An estimated withdrawal liability of $31,683 was recorded in the fourth quarter of 2012.

[2] Results for the fourth quarter of 2011 were favorably impacted by a decrease in the effective tax rate for the quarter. The decrease in the effective tax rate was principally due to discrete period tax benefits related to the release of certain valuation allowances in the amount of $2,124, primarily for the Company's Australian subsidiary. In addition, the fourth quarter of 2011 operating results were favorably impacted by the reduction of an estimated contingent consideration liability in the amount of $3,320, related to a 2010 acquisition, and $825 related to the reduction of an employment tax reserve for a 2008 acquisition.

[3] Results for the third quarter of 2011 were favorably impacted by a decrease in the effective tax rate for the quarter. The decrease in the effective tax rate was principally due to discrete period tax benefits related to the release of certain valuation allowances in the amount of $4,008, primarily for the Company's United Kingdom subsidiary.