Debt (Summary of Senior Notes) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Net premiums, discounts, and issuance costs (b)	$ (7,693)	$ (8,047)
Total senior notes	1,881,451	1,891,252
Other notes payable	75,403	70,966
Notes payable	1,956,854	1,962,218
Estimated fair value	$ 2,045,752	2,080,187
Senior Notes \| 5.500% unsecured senior notes due March 2026
Debt Instrument [Line Items]
Stated interest rate	5.50%
Face amount	$ 445,269	455,424
Senior Notes \| 5.000% unsecured senior notes due January 2027
Debt Instrument [Line Items]
Stated interest rate	5.00%
Face amount	$ 443,875	443,875
Senior Notes \| 7.875% unsecured senior notes due June 2032
Debt Instrument [Line Items]
Stated interest rate	7.875%
Face amount	$ 300,000	300,000
Senior Notes \| 6.375% unsecured senior notes due May 2033
Debt Instrument [Line Items]
Stated interest rate	6.375%
Face amount	$ 400,000	400,000
Senior Notes \| 6.000% unsecured senior notes due February 2035
Debt Instrument [Line Items]
Stated interest rate	6.00%
Face amount	$ 300,000	$ 300,000

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