CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Other Comprehensive Income [Abstract]
Net loss	$ (12,342)	$ (47,547)	$ (57,605)	$ (216,602)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(204)	89	(90)	(215)
Net unrealized (loss) gain on derivative	(75)	(126)	629	(7,179)
Amount realized and reclassified into earnings	475	519	1,456	888
Total other comprehensive income (loss) net of tax	196	482	1,995	(6,506)
Total comprehensive loss	$ (12,146)	$ (47,065)	$ (55,610)	$ (223,108)