Goodwill and Intangible Assets, Net (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Changes in gross carrying amount of finite-lived intangible assets
Gross Carrying Amount	$ 61,260,000	$ 63,684,000	$ 61,260,000	$ 63,684,000	$ 69,693,000
Accumulated Amortization	(24,305,000)	(23,609,000)	(24,305,000)	(23,609,000)	(19,095,000)
Net Carrying Amount	36,955,000	40,075,000	36,955,000	40,075,000	50,598,000
Amortization expense of intangible assets	1,200,000	1,700,000	5,209,000	5,400,000
Estimated future amortization of intangible assets
Remaining three months of 2013	1,772,000		1,772,000
2014	6,997,000		6,997,000
2015	6,085,000		6,085,000
2016	5,810,000		5,810,000
2017	3,848,000		3,848,000
2018	2,954,000		2,954,000
Thereafter	9,489,000		9,489,000
Total	36,955,000		36,955,000
Keymark
Changes in gross carrying amount of finite-lived intangible assets
Reclassifications of amortizable intangible assets			(5,900,000)
Reclassifications of goodwill			5,900,000
North America
Changes in gross carrying amount of finite-lived intangible assets
Gross Carrying Amount	33,975,000	35,620,000	33,975,000	35,620,000	37,992,000
Accumulated Amortization	(15,032,000)	(16,278,000)	(15,032,000)	(16,278,000)	(12,012,000)
Net Carrying Amount	18,943,000	19,342,000	18,943,000	19,342,000	25,980,000
Europe
Changes in gross carrying amount of finite-lived intangible assets
Gross Carrying Amount	27,285,000	28,064,000	27,285,000	28,064,000	31,701,000
Accumulated Amortization	(9,273,000)	(7,331,000)	(9,273,000)	(7,331,000)	(7,083,000)
Net Carrying Amount	18,012,000	20,733,000	18,012,000	20,733,000	24,618,000
S&P Clever
Changes in gross carrying amount of finite-lived intangible assets
Reclassifications of other non-current assets			4,800,000
Reclassifications of amortizable intangible assets			(4,500,000)
Reclassifications of goodwill			$ (600,000)