Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive (Loss) Income
Beginning Balance	$ (24,274)	$ (10,914)	$ (19,495)	$ (5,894)
Other Comprehensive loss before reclassifications	(2,685)	(7,413)	(7,464)	(12,433)
Amounts reclassified from accumulated other comprehensive loss	(1,066)		(1,066)
Other comprehensive (loss) income	(3,751)	(7,413)	(8,530)	(12,433)
Ending Balance	(28,025)	$ (18,327)	$ (28,025)	$ (18,327)
Currency translation adjustment
Accumulated Other Comprehensive (Loss) Income
Amounts reclassified from accumulated other comprehensive loss	$ (1,100)