Acquisition Integration and Restructuring (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	Sep. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Restructuring Cost and Reserve [Line Items]
Remaining restructuring reserve	$ 5,755												$ 5,755
Restructuring reserve included in accrued expenses	3,814					844							3,814	844
Restructuring reserve included in other long term liabilities	1,941					2,478							1,941	2,478
Summary of cost reduction and restructuring actions [Roll Forward]
Restructuring and cost reduction related cost													5,421	1,082	1,768
Impairment charges and other relocation expenses													246	388
Reserve reversed due to office consolidation													494
Consulting and moving fees related to restructuring													197
Legal fees related to restructuring activities															476
Restructuring charges	596	[1]	1,218	2,472	1,084	(120)	[2]	468	[3]	691	431		5,370	1,470	2,244
Expenses related to cost reduction program [Abstract]
Period ended													5,370	1,470	2,244	6,459	10,390
Cumulative since program inception													25,933
Summary of asset sale [Abstract]
Net cash received from buyer												462
Book value of assets sold	65,491					60,064						(362)	65,491	60,064
Expenses of sale												(28)
Goodwill write-off												(50)
Pretax gain on sale of assets												22
Americas [Member]
Expenses related to cost reduction program [Abstract]
Period ended													4,359	809	1,266	3,614	5,701
Cumulative since program inception													15,749
Europe [Member]
Expenses related to cost reduction program [Abstract]
Period ended													881	586	555	1,400	3,552
Cumulative since program inception													6,974
Asia Pacific [Member]
Expenses related to cost reduction program [Abstract]
Period ended													129	0	(70)	992	248
Cumulative since program inception													1,299
Corporate [Member]
Expenses related to cost reduction program [Abstract]
Period ended													1	75	493	453	889
Cumulative since program inception													1,911
Actions Initiated in 2008 [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					2,789						3,510		2,789	3,510	4,212
New accruals													0	0	265
Adjustments													562	112	150
Cash payments													(590)	(833)	(1,117)
End of Period	2,761					2,789							2,761	2,789	3,510
Actions Initiated in 2008 [Member] | Employee Terminations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0						142		0	142	288
New accruals													0	0	39
Adjustments													0	4	(161)
Cash payments													0	(146)	(24)
End of Period	0					0							0	0	142
Actions Initiated in 2008 [Member] | Lease Obligations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					2,789						3,368		2,789	3,368	3,924
New accruals													0	0	226
Adjustments													562	108	311
Cash payments													(590)	(687)	(1,093)
End of Period	2,761					2,789							2,761	2,789	3,368
Actions Initiated in 2009 [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0						104		0	104	1,033
New accruals													0	21	108
Adjustments													0	(1)	(326)
Cash payments													0	(124)	(711)
End of Period	0					0							0	0	104
Actions Initiated in 2009 [Member] | Employee Terminations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0						104		0	104	925
New accruals													0	21	77
Adjustments													0	(1)	(198)
Cash payments													0	(124)	(700)
End of Period	0					0							0	0	104
Actions Initiated in 2009 [Member] | Lease Obligations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0						0		0	0	108
New accruals													0	0	31
Adjustments													0	0	(128)
Cash payments													0	0	(11)
End of Period	0					0							0	0	0
Actions Initiated in 2010 [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					408						570		408	570	0
New accruals													10	13	1,616
Adjustments													8	(37)	(45)
Cash payments													(24)	(138)	(1,001)
End of Period	402					408							402	408	570
Actions Initiated in 2010 [Member] | Employee Terminations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					408						570		408	570	0
New accruals													10	13	1,616
Adjustments													8	(37)	(45)
Cash payments													(24)	(138)	(1,001)
End of Period	402					408							402	408	570
Actions Initiated in 2010 [Member] | Lease Obligations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0						0		0	0	0
New accruals													0	0	0
Adjustments													0	0	0
Cash payments													0	0	0
End of Period	0					0							0	0	0
Actions Initiated in 2011 [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					125						0		125	0
New accruals													0	996
Adjustments													(7)	(22)
Cash payments													(103)	(849)
End of Period	15					125							15	125
Actions Initiated in 2011 [Member] | Employee Terminations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					125						0		125	0
New accruals													0	996
Adjustments													(7)	(22)
Cash payments													(103)	(849)
End of Period	15					125							15	125
Actions Initiated in 2011 [Member] | Lease Obligations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0						0		0	0
New accruals													0	0
Adjustments													0	0
Cash payments													0	0
End of Period	0					0							0	0
Actions Initiated In 2012 [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0								0
New accruals													4,655
Adjustments													193
Cash payments													(2,271)
End of Period	2,577												2,577
Actions Initiated In 2012 [Member] | Employee Terminations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0								0
New accruals													3,120
Adjustments													(26)
Cash payments													(1,704)
End of Period	1,390												1,390
Actions Initiated In 2012 [Member] | Lease Obligations [Member]
Summary of cost reduction and restructuring actions [Roll Forward]
Beginning of Period					0								0
New accruals													1,535
Adjustments													219
Cash payments													(567)
End of Period	1,187												1,187
Accrued expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve included in accrued expenses	3,814												3,814
Other long-term liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve included in other long term liabilities	$ 1,941												$ 1,941

[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.