Indebtedness - Summary of Debt Facilities (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Nov. 14, 2017
Debt Instrument [Line Items]
Principal amount	$ 1,119,993,000
Total carrying value of debt facilities	1,096,876,000	$ 992,493,000
Total fair value of debt facilities	1,422,223,000	1,944,249,000
2024 Convertible Notes [Member]
Debt Instrument [Line Items]
Principal amount	569,993,000	569,993,000	$ 570,000,000.0
Unamortized discount	0	(98,721,000)
Unamortized discount - debt issuance costs	(6,320,000)	(6,510,000)
Net carrying value	563,673,000	464,762,000
Total fair value of debt facilities	846,138,000	1,394,249,000
2019 Term Loan [Member]
Debt Instrument [Line Items]
Principal amount	550,000,000	550,000,000
Unamortized discount	(16,797,000)	(22,269,000)
Net carrying value	533,203,000	527,731,000
Total fair value of debt facilities	$ 576,085,000	$ 550,000,000

Face (par) amount of debt instrument at time of issuance.

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