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LOANS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets	$ 89,648,423		$ 89,648,423		$ 81,850,712	[1]
Loan loss (provision) reversal	0	$ 1,613	219	$ 27,918
Residential Mortgage Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets	1,800,000		1,800,000		1,800,000
Loans held-for-sale	$ 1,100		$ 1,100		$ 1,300
Percent of adjustable-rate loans	12.00%		12.00%		11.00%
[1] (1)Derived from the audited consolidated financial statements at December 31, 2022.

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