UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Comprehensive Income (Loss), Tax [Abstract]
Net (loss) income	$ (12,236)	$ 25,910
Other comprehensive income, net of tax:
Foreign currency translation gain	249	130
Net other comprehensive (loss) income, net of ($59) and $51 tax, respectively	(238)	44
Total other comprehensive income, net of tax	11	174
Total comprehensive (loss) income	$ (12,225)	$ 26,084