Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 1,983	$ 8,036	$ 446	$ 23,105
Other comprehensive income, net of reclassification adjustments:
Unrealized gains on interest rate swap contracts	108	0	108	0
Foreign currency translation adjustments	(502)	(1,555)	(5,296)	(127)
Other comprehensive loss	(394)	(1,555)	(5,188)	(127)
Comprehensive income (loss)	$ 1,589	$ 6,481	$ (4,742)	$ 22,978