Debt - Long-Term Debt Maturities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
2021	$ 376,061
2022	627,319
2023	339,672
2024	1,004,935
2025	940,790
Thereafter	13,631,244
Subtotal	16,920,021
Premiums (discounts), net	11,161
Debt issuance costs, net	(82,106)
Total	16,849,076	$ 11,905,877
Credit Facilities [Member]
Debt Instrument [Line Items]
2021	0
2022	0
2023	171,794
2024	0
2025	0
Thereafter	0
Subtotal	171,794
Premiums (discounts), net	0
Debt issuance costs, net	0
Total	171,794	184,255
Senior Notes [Member]
Debt Instrument [Line Items]
2021	0
2022	552,195
2023	0
2024	735,664
2025	798,506
Thereafter	12,251,211
Subtotal	14,337,576
Premiums (discounts), net	10,901
Debt issuance costs, net	(72,607)
Total	14,275,870	9,660,570
Term Loans and Unsecured Other [Member]
Debt Instrument [Line Items]
2021	260,294
2022	0
2023	133,837
2024	0
2025	0
Thereafter	1,377,565
Subtotal	1,771,696
Premiums (discounts), net	0
Debt issuance costs, net	(7,385)
Total	1,764,311	1,441,882
Secured Mortgage [Member]
Debt Instrument [Line Items]
2021	115,767
2022	75,124
2023	34,041
2024	269,271
2025	142,284
Thereafter	2,468
Subtotal	638,955
Premiums (discounts), net	260
Debt issuance costs, net	(2,114)
Total	$ 637,101	$ 619,170

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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