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LOANS - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets	$ 93,227,236	$ 81,850,712
Loan loss (provision) reversal	(219)	(20,660)	$ (145,066)
Allowance for loan loss	0	0
Residential mortgage loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets	2,400,000	1,800,000
Loans held-for-sale	$ 1,200	$ 1,300
Percent of adjustable-rate loans	11.00%	11.00%

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