Senior Unsecured Notes - Reconciliation of Senior Unsecured Notes to Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands		1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 14, 2020	Dec. 31, 2020	Dec. 14, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Senior unsecured notes, beginning balance			$ 945,566	$ 945,566
Amortization of deferred financing costs				1,004	$ 1,010	$ 1,083
Senior unsecured notes, ending balance		$ 1,238,660		1,238,660	945,566
5.625% Senior Notes [Member]
Debt Instrument [Line Items]
Writeoff of unamortized premium on Old Notes	$ 5,000
Writeoff of deferred financing costs on Old Notes	$ 1,500
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Senior unsecured notes, beginning balance			945,566	945,566	944,780
Accretion of discount					1,539
Amortization of note premium					(1,062)
Amortization of deferred financing costs					309
Senior unsecured notes, ending balance		1,238,660		1,238,660	$ 945,566	$ 944,780
Senior Unsecured Notes [Member] | 5.625% Senior Notes [Member]
Debt Instrument [Line Items]
Accretion of discount			1,466
Amortization of note premium			(1,011)
Amortization of deferred financing costs			$ 293
Aggregate principal amount paid on Old Notes				(950,000)
Writeoff of unaccreted discount on Old Notes				7,225
Writeoff of unamortized premium on Old Notes				(4,988)
Writeoff of deferred financing costs on Old Notes				1,449
Senior Unsecured Notes [Member] | 3.875% Senior Notes [Member]
Debt Instrument [Line Items]
Accretion of discount		53
Amortization of deferred financing costs		$ 11
Aggregate principal amount issued on New Notes				1,250,000
Notes discount and deferred transaction costs on New Notes				$ (11,404)