Segments - Reconciliation of Total Segment EBITDA to (Loss) Income Before Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
Total Segment EBITDA	$ 29,654	$ 64,832	$ 66,240	$ 199,005
Depreciation and amortization	13,636	11,832	39,436	32,316
Other expense	(24)	(61)	(784)	(4,824)
Income from operations	16,042	53,061	27,588	171,513
Interest income	349	1,808	2,635	5,585
Interest expense	(20,686)	(14,807)	(61,394)	(44,192)
(Loss) income before income taxes	$ (4,319)	$ 40,001	$ (31,955)	$ 128,082