Goodwill and Intangible Assets, Net (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	$ 66,256,000	$ 66,846,000	$ 66,256,000	$ 66,846,000	$ 67,737,000
Accumulated Amortization	(31,474,000)	(24,305,000)	(31,474,000)	(24,305,000)	(25,964,000)
Net Carrying Amount	34,782,000	42,541,000	34,782,000	42,541,000	41,773,000
Amortization expense of intangible assets	1,800,000	1,200,000	5,511,000	5,200,000
Estimated future amortization of intangible assets
Remaining three months of 2014	1,638,000		1,638,000
2015	6,152,000		6,152,000
2016	5,918,000		5,918,000
2017	4,142,000		4,142,000
2018	3,166,000		3,166,000
2019	3,138,000		3,138,000
Thereafter	8,444,000		8,444,000
Total	32,598,000		32,598,000
North America
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	34,490,000	34,591,000	34,490,000	34,591,000	34,520,000
Accumulated Amortization	(18,941,000)	(15,032,000)	(18,941,000)	(15,032,000)	(15,909,000)
Net Carrying Amount	15,549,000	19,559,000	15,549,000	19,559,000	18,611,000
Europe
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	31,766,000	32,255,000	31,766,000	32,255,000	33,217,000
Accumulated Amortization	(12,533,000)	(9,273,000)	(12,533,000)	(9,273,000)	(10,055,000)
Net Carrying Amount	19,233,000	22,982,000	19,233,000	22,982,000	23,162,000
In Process Research and Development
Changes in gross carrying amount of finite-lived intangible assets
Intangible Assets, Indefinite Lived to Finite Lived, Transfers, Amount			$ 3,300,000