Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended						9 Months Ended										1 Months Ended				1 Months Ended		0 Months Ended		0 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Canadian Subsidiary [Member]	Sep. 30, 2012 Swing-line Loan [Member]	Sep. 30, 2012 Credit Agreement 2010 [Member]	Sep. 30, 2012 Credit Agreement 2012 [Member]	Sep. 30, 2012 Letters of Credit [Member]	Sep. 30, 2012 LIBOR Borrowing [Member]	Dec. 31, 2011 LIBOR Borrowing [Member]	Sep. 30, 2012 Prime Rate Borrowings [Member]	Dec. 31, 2011 Prime Rate Borrowings [Member]	Sep. 30, 2012 Prime Rate Borrowings [Member] Canadian Subsidiary [Member]	Dec. 31, 2011 Prime Rate Borrowings [Member] Canadian Subsidiary [Member]	Sep. 30, 2012 Bankers Acceptance Agreements Borrowing [Member] Canadian Subsidiary [Member]	Dec. 31, 2011 Bankers Acceptance Agreements Borrowing [Member] Canadian Subsidiary [Member]	Sep. 30, 2012 Business Insurance Premiums Financing [Member]	Mar. 31, 2012 Business Insurance Premiums Financing [Member]	Sep. 30, 2011 Software License Agreement Financing [Member]	Sep. 30, 2012 Software License Agreement Financing [Member]	Oct. 31, 2011 Equipment and Software Maintenance [Member]	Sep. 30, 2012 Equipment and Software Maintenance [Member]	Jan. 27, 2012 Private shelf facility agreement [Member]	Sep. 30, 2012 Private shelf facility agreement [Member]	Jan. 27, 2012 Series E Senior Note [Member]	Jan. 27, 2012 Series F Senior Note [Member]	Sep. 30, 2012 Series A senior note payable - Tranche A [Member]	Dec. 31, 2011 Series A senior note payable - Tranche A [Member]	Sep. 30, 2012 Series A senior note payable - Tranche B [Member]	Dec. 31, 2011 Series A senior note payable - Tranche B [Member]	Sep. 30, 2012 Series A senior note payable - Tranche A & Tranche B [Member]	Sep. 30, 2012 Series F senior note payable [Member]	Dec. 31, 2011 Series F senior note payable [Member]	Sep. 30, 2012 Series E senior note payable [Member]	Dec. 31, 2011 Series E senior note payable [Member]	Sep. 30, 2012 Brandimage acquisition Note payable [Member]
Debt obligations [Abstract]
Revolving credit agreement	$ 61,545		$ 61,545		$ 68,968
Senior note payable																													3,687	3,687	2,458	3,687		25,000	0	0	17,206
Other	2,008		2,008		1,631																																	10
Debt total	94,698		94,698		95,179																												6,145
Less amounts due in one year or less	(4,865)		(4,865)		(21,442)																												(3,072)					(10)
Total	89,833		89,833		73,737																												3,073
Number of private placements of debt			2
Senior notes interest rate, minimum (in hundredths)			8.90%
Senior notes interest rate, maximum (in hundredths)			8.98%
Line of Credit Facility [Line Items]
Term of revolving credit facility			two and one-half year
Multicurrency revolving credit facility, maximum borrowing capacity						1,000	10,000	90,000	125,000	10,000																75,000
Amount outstanding											44,500	47,000	9,875	14,515	254	196	6,916	7,257						432
Interest rate (in hundredths)											2.43%	2.72%	4.50%	4.75%	4.00%	4.50%	3.30%	3.80%
Optional increase in amount of Credit Agreement, maximum									50,000
Minimum number of new commitments to be obtained to increase the Credit Agreement									1
Basis spread on reference rate (in hundredths)									1.75%				1.50%
Maximum basis spread on LIBOR borrowings (In hundredths)								3.50%	2.25%
Debt instrument, face amount																											20,278	25,000
Debt instrument, interest rate, stated percentage (in hundredths)																											9.17%	4.38%
Debt instrument, maturity date																											Jan. 28, 2012	Jan. 27, 2019
Maximum number of maturities years under Shelf Facility																									10 years
Last payments installments due date																			Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2013		Dec. 31, 2013
Notice period to terminate the unused portion																									30 days
New borrowings																			1,075	714	906		649
Software license fees and business premiums outstanding, current																			1,315			252		216
Software license fees and business premiums outstanding, non-current																								216
Agreement expiration date																					Sep. 30, 2014		Nov. 30, 2014
Deferred Financing Fees [Abstract]
Fees capitalized as deferred financing fees			853
Amortization of deferred financing fees	66	151	231	455
Unamortized deferred financing fees	$ 998		$ 998