Senior Notes, Convertible Notes and Trust Preferred Securities - Narrative (Details) - USD ($)	1 Months Ended		12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2007
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt satisfaction gains (losses), net			$ (119,000)	$ (13,894,000)	$ 21,452,000
Senior Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument, unamortized discount			3,228,000	3,655,000
Mortgages and notes payable			$ 998,932,000	998,932,000
Senior Notes | Senior Notes Due 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate	4.25%
Extinguishment of debt	$ 188,756,000	$ 61,244,000
Extinguishment of debt, make-whole premium	12,191,000
Extinguishment of debt, accrued and unpaid interest	2,028,000
Debt satisfaction gains (losses), net	12,948,000	$ 10,199,000
Senior Notes | Senior Notes Due 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate		4.40%	4.40%
Issue price			99.883%
Extinguishment of debt		$ 51,068,000
Mortgages and notes payable			$ 198,932,000	198,932,000
Senior Notes | Senior Notes Due 2031
Accounts, Notes, Loans and Financing Receivable [Line Items]
Face amount	400,000,000
Interest Rate			2.375%
Issue price			99.758%
Debt instrument, unamortized discount	$ 968,000
Mortgages and notes payable			$ 400,000,000	400,000,000
Senior Notes | Senior Notes Due 2030
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Rate			2.70%
Issue price			99.233%
Debt instrument, unamortized discount		3,068,000
Mortgages and notes payable		$ 400,000,000		400,000,000
6.804% Trust Preferred Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Face amount						$ 200,000,000
Interest Rate			6.115%
Principal amount outstanding on Trust Preferred Securities			$ 129,120,000	129,120,000
Debt issuance costs, gross			$ 1,426,000	$ 1,525,000
6.804% Trust Preferred Securities | London Interbank Offered Rate (LIBOR)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Basis spread on variable rate						1.70%