Leases - Schedule of Future Lease Payments Due Under Ground Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Leases
2021 (remaining)	$ 3,087
2022	4,093
2023	4,132
2024	4,183
2025	4,423
2026	1,439
Thereafter	598,489
Total undiscounted future lease payments	619,846
Difference between undiscounted cash flows and discounted cash flows	(534,398)
Total lease liability	$ 85,448	$ 85,065
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesMember
Financing Leases
2021 (remaining)	$ 2,322
2022	3,174
2023	3,269
2024	3,367
2025	3,468
2026	3,572
Thereafter	323,482
Total undiscounted future lease payments	342,654
Difference between undiscounted cash flows and discounted cash flows	(284,680)
Total lease liability	$ 57,974	$ 57,727