Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive (Loss) Income
Beginning Balance	$ (19,495)	$ (5,894)
Other Comprehensive loss before reclassifications	(13,416)	(13,601)
Amounts reclassified from accumulated other comprehensive loss	(1,066)
Other comprehensive (loss) income	(14,482)	(13,601)	$ (14,430)
Ending Balance	(33,977)	$ (19,495)	$ (5,894)
Currency translation adjustment
Accumulated Other Comprehensive (Loss) Income
Amounts reclassified from accumulated other comprehensive loss	$ (1,100)