INVESTMENTS - Mortgage Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Mortgage loans, held for investment:
Commercial	$ 483,769	$ 529,075
Allowance for expected credit losses	(25,862)	(23,378)	$ (8,113)	$ (6,220)
Total mortgage loans held for investment	$ 457,907	$ 505,697
Commercial (as a percent)	106.00%	105.00%
Allowance for expected credit losses (as a percent)	(6.00%)	(5.00%)
Total mortgage loans held-for investment (as a percent)	100.00%	100.00%