Goodwill and Intangible Assets, Net (Details 2) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	$ 67,716,000	$ 71,833,000	$ 67,716,000	$ 71,833,000	$ 67,737,000
Accumulated Amortization	(29,660,000)	(23,108,000)	(29,660,000)	(23,108,000)	(25,964,000)
Net Carrying Amount	38,056,000	48,725,000	38,056,000	48,725,000	41,773,000
Amortization expense of intangible assets	1,500,000	2,000,000	3,697,000	4,000,000
Estimated future amortization of intangible assets
Remaining six months of 2014	3,542,000		3,542,000
2015	6,401,000		6,401,000
2016	6,293,000		6,293,000
2017	4,422,000		4,422,000
2018	3,442,000		3,442,000
2019	3,414,000		3,414,000
Thereafter	8,238,000		8,238,000
Total	35,752,000		35,752,000
North America
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	34,514,000	40,525,000	34,514,000	40,525,000	34,520,000
Accumulated Amortization	(17,929,000)	(14,591,000)	(17,929,000)	(14,591,000)	(15,909,000)
Net Carrying Amount	16,585,000	25,934,000	16,585,000	25,934,000	18,611,000
Europe
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	33,202,000	31,308,000	33,202,000	31,308,000	33,217,000
Accumulated Amortization	(11,731,000)	(8,517,000)	(11,731,000)	(8,517,000)	(10,055,000)
Net Carrying Amount	21,471,000	22,791,000	21,471,000	22,791,000	23,162,000
In Process Research and Development [Member]
Changes in gross carrying amount of finite-lived intangible assets
Intangible Assets, Indefinite Lived to Finite Lived, Transfers, Amount	$ 3,300,000