Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Comprehensive Income (Loss), before Tax [Abstract]
Foreign currency translation adjustment	$ 95	$ 51
Reclassification of net losses on derivative instruments	153	153
Total Other Comprehensive (Loss) Income	248	204
Other Comprehensive Income (Loss), Tax [Abstract]
Foreign currency translation adjustment	0	0
Reclassification of net losses on derivative instruments	(40)	(60)
Total Other Comprehensive (Loss) Income	(40)	(60)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	95	51
Reclassification of net losses on derivative instruments	113	93
Total Other Comprehensive Income	$ 208	$ 144