Mortgage Loans on Real Estate - Schedule of Reconciliation of the UPB Mortgage Loans (Details) - UPB - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Balance at beginning of period	$ 3,512,486	$ 2,587,220	$ 1,944,804
New mortgage loans	1,117,846	1,761,853	1,326,275
Acquisition	13,075	17,657	22,437
Capitalized Interest	2,395	1,604	2,045
Collection of principal	(474,406)	(525,986)	(568,081)
Collection of capitalized interest	(570)	(2,155)	(2,163)
Foreclosures	(52,208)	(10,031)	(11,603)
Mortgages sold	(45,728)	(317,676)	(126,494)
Balance at end of period	$ 4,072,890	$ 3,512,486	$ 2,587,220