CONDENSED CONSOLIDATED AND COMBINED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 19, 2019	Sep. 30, 2019	Sep. 30, 2020
Statement Of Other Comprehensive Income [Abstract]
Net (loss) income	$ (22,447)	$ 3,670	$ (24,781)	$ (14,350)	$ (252,516)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	89	7	(165)	(384)	(215)
Net unrealized (loss) gain on derivative	(126)	53		53	(7,179)
Amount realized and reclassified into earnings	519	(35)		(35)	888
Total other comprehensive loss, net of tax	482	60	(165)	(331)	(6,506)
Comprehensive (loss) income	(21,965)	3,730	(24,946)	(14,681)	(259,022)
Comprehensive income attributable to noncontrolling interest		1,308	678	2,362
Comprehensive (loss) income attributable to common shareholders and Parent, respectively	$ (21,965)	$ 2,422	$ (25,624)	$ (17,043)	$ (259,022)