Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Changes in the carrying amount of goodwill
Balance at the beginning of the period			$ 123,950
Foreign exchange			1,047
Balance at the end of the period	$ 126,845	$ 123,277	126,845	$ 123,277
Changes in the carrying amount of intangible assets
Balance at the beginning of the period			27,675
Goodwill, Acquired During Period			1,848
Finite-lived Intangible Assets Acquired			1,212
Amortization	(1,500)	(1,500)	(4,558)	(4,600)
Foreign exchange			300
Balance at the end of the period	$ 24,629	$ 28,570	$ 24,629	$ 28,570