Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (95,304)	$ 68,271	$ (41,276)
Other comprehensive income (loss), net of tax:
Foreign currency translation (loss) gain	(419)	134	(1,024)
Net other comprehensive income, net of ($18), $28, $16 tax, respectively	269	165	116
Total other comprehensive (loss) income, net of tax	(150)	299	(908)
Total comprehensive (loss) income	$ (95,454)	$ 68,570	$ (42,184)