Schedule I - Condensed Statements of Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	$ (312,321)	$ 89,476	$ 44,788
Net (loss) income	(312,321)	89,476	44,788
Comprehensive (loss) income	(310,762)	85,633	53,242
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(312,321)	89,476	44,788
Net (loss) income	(312,321)	89,476	44,788
Equity in other comprehensive income (loss) of subsidiary	1,559	(3,843)	8,454
Comprehensive (loss) income	(310,762)	85,633	53,242
Parent Company [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	$ (312,321)	$ 89,476	$ 44,788