Schedule IV - Mortgage Loans on Real Estate - Reconciliation of Mortgage Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of mortgage loans:
Balance at beginning of year	$ 697,906	$ 877,102	$ 293,752
Additions:
Advances on loans receivable	313,877	33,555	843,249
Interest added	39,768	49,932	11,815
Total additions	353,645	83,487	855,064
Deductions:
Receipts on loans receivable	(42,415)	(181,040)	(214,132)
Loan balance transferred to non-real estate loans receivable	0	0	(9,142)
Change in allowance for credit losses and charge-offs	(4,706)	2,894	(6,984)
Other	0	0	(29,619)
Total deductions	(47,121)	(178,146)	(259,877)
Change in balance due to foreign currency translation	38,822	(84,537)	(11,837)
Balance at end of year	$ 1,043,252	$ 697,906	$ 877,102