Schedule III - Real Estate and Accumulated Depreciation and Amortization - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
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
Reconciliation of real estate owned:
Balance at the beginning of year	3,583,978	$ 3,514,564	$ 3,320,574
Additions during year	229,962	860,311	580,861
Properties sold and impaired during the year	(161,393)	(653,247)	(354,218)
Other reclassifications	38,519
Other reclassifications		(137,650)	(32,653)
Balance at end of year	3,691,066	3,583,978	3,514,564
Reconciliation of accumulated depreciation and amortization:
Balance at the beginning of year	504,699	684,468	675,596
Depreciation and amortization expense	144,163	138,879	127,504
Accumulated depreciation and amortization of properties sold, impaired and held for sale during year	(43,521)	(244,751)	(102,261)
Other reclassifications	21,686	(73,897)	(16,371)
Balance at end of year	$ 627,027	$ 504,699	$ 684,468