LOANS - Additional Information about Residential Mortgage Loans (Details) - Residential mortgage loans $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) point	Dec. 31, 2021 USD ($) point
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 12,247,346	$ 7,535,855
Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 3	$ 1
Interest rate	2.00%	0.75%
FICO score at loan origination | point	588	604
Loan-to-value ratio at loan origination	5.00%	8.00%
Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 4,396	$ 4,382
Interest rate	15.00%	9.24%
FICO score at loan origination | point	831	831
Loan-to-value ratio at loan origination	100.00%	103.00%
Weighted Average
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 489	$ 513
Interest rate	4.61%	4.04%
FICO score at loan origination | point	759	762
Loan-to-value ratio at loan origination	68.00%	66.00%