Accumulated Other Comprehensive Loss - Components Of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	$ (5,362)	$ (4,756)	$ (2,087)
Deferred loss on cash flow hedge	(3,160)	(4,022)	(4,884)
Total accumulated other comprehensive loss	$ (8,522)	$ (8,778)	$ (6,971)