Goodwill and Intangible Assets, Net (Details 2) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	$ 60,127	$ 58,874	$ 67,716
Accumulated Amortization	(29,384)	(26,287)	(29,660)
Net Carrying Amount	30,743	32,587	38,056
Estimated future amortization of intangible assets
Remaining six months of 2015	3,070
2016	5,957
2017	4,263
2018	3,315
2019	3,286
2020	3,257
Thereafter	5,365
Total	28,513
North America
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	29,426	29,455	34,514
Accumulated Amortization	(16,351)	(14,719)	(17,929)
Net Carrying Amount	13,075	14,736	16,585
Europe
Changes in gross carrying amount of finite-lived intangible assets
Finite-Lived Intangible Assets, Gross	30,701	29,419	33,202
Accumulated Amortization	(13,033)	(11,568)	(11,731)
Net Carrying Amount	$ 17,668	$ 17,851	$ 21,471