Schedule III - Real Estate and Accumulated Depreciation and Amortization - Summary (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Total cost basis for federal income tax purposes	$ 4,400,000,000
Reconciliation of real estate owned:
Balance at the beginning of year	3,691,066,000	$ 3,583,978,000	$ 3,514,564,000
Additions during year	164,489,000	229,962,000	860,311,000
Properties sold and impaired during the year	(174,466,000)	(161,393,000)	(653,247,000)
Other reclassifications	93,150,000	38,519,000
Other reclassifications			(137,650,000)
Balance at end of year	3,774,239,000	3,691,066,000	3,583,978,000
Reconciliation of accumulated depreciation and amortization:
Balance at the beginning of year	627,027,000	504,699,000	684,468,000
Depreciation and amortization expense	147,617,000	144,163,000	138,879,000
Accumulated depreciation and amortization of properties sold and impaired during year	(100,474,000)	(43,521,000)	(244,751,000)
Other reclassifications	39,207,000	21,686,000	(73,897,000)
Balance at end of year	$ 713,377,000	$ 627,027,000	$ 504,699,000