Debt - Long-Term Debt Maturities (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
2021	$ 41,645
2022	548,792
2023	173,715
2024	135,588
2025	193,645
Thereafter	15,964,031
Subtotal	17,057,416
Premiums (discounts), net	15,305
Debt issuance costs, net	(87,416)
Total	16,985,305	$ 16,849,076
Credit Facilities [Member]
Debt Instrument [Line Items]
2021	0
2022	0
2023	0
2024	0
2025	0
Thereafter	0
Subtotal	0
Premiums (discounts), net	0
Debt issuance costs, net	0
Total	0	171,794
Senior Notes [Member]
Debt Instrument [Line Items]
2021	0
2022	534,780
2023	0
2024	0
2025	45,210
Thereafter	14,616,061
Subtotal	15,196,051
Premiums (discounts), net	4,250
Debt issuance costs, net	(79,757)
Total	15,120,544	14,275,870
Term Loans and Unsecured Other [Member]
Debt Instrument [Line Items]
2021	9,976
2022	0
2023	137,637
2024	0
2025	0
Thereafter	1,283,975
Subtotal	1,431,588
Premiums (discounts), net	0
Debt issuance costs, net	(6,075)
Total	1,425,513	1,764,311
Secured Mortgage [Member]
Debt Instrument [Line Items]
2021	31,669
2022	14,012
2023	36,078
2024	135,588
2025	148,435
Thereafter	63,995
Subtotal	429,777
Premiums (discounts), net	11,055
Debt issuance costs, net	(1,584)
Total	$ 439,248	$ 637,101

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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