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Indebtedness - Schedule of Outstanding Debts (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Unsecured debt
Debt Instrument
Total floating rate debt	$ 800,000,000	$ 200,000,000
Debt issuance costs, net	0	951,000
Senior unsecured notes
Debt Instrument
Debt issuance costs, net	37,836,000	35,045,000
Face Amount	2,850,000,000	2,650,000,000
Unamortized Discount	5,353,000	6,766,000
Unsecured Revolving Credit Facility | Unsecured debt
Debt Instrument
Unsecured revolving credit facility	800,000,000	0
Unsecured term loan due September 2022 | Unsecured debt
Debt Instrument
Unsecured term loans	$ 0	200,000,000
Senior unsecured notes due 2021 | Senior unsecured notes
Debt Instrument
Coupon	6.75%
Face Amount	$ 0	300,000,000
Unamortized Discount	$ 0	490,000
Senior unsecured notes due 2024 | Senior unsecured notes
Debt Instrument
Coupon	4.75%
Face Amount	$ 250,000,000	250,000,000
Unamortized Discount	$ 184,000	263,000
Senior unsecured notes due 2025 | Senior unsecured notes
Debt Instrument
Coupon	9.75%
Face Amount	$ 1,000,000,000	1,000,000,000
Unamortized Discount	$ 0	0
Senior unsecured notes due 2028 | Senior unsecured notes
Debt Instrument
Coupon	4.75%
Face Amount	$ 500,000,000	500,000,000
Unamortized Discount	$ 5,169,000	6,013,000
Senior unsecured notes due 2031 | Senior unsecured notes
Debt Instrument
Coupon	4.375%
Face Amount	$ 500,000,000	0
Unamortized Discount	$ 0	0
Senior unsecured notes due 2042 | Senior unsecured notes
Debt Instrument
Coupon	5.625%
Face Amount	$ 350,000,000	350,000,000
Unamortized Discount	$ 0	0
Senior unsecured notes due 2046 | Senior unsecured notes
Debt Instrument
Coupon	6.25%
Face Amount	$ 250,000,000	250,000,000
Unamortized Discount	$ 0	$ 0
Senior Unsecured Notes Due June 2021 | Senior unsecured notes
Debt Instrument
Coupon	6.75%
Face Amount	$ 300,000,000

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