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LOANS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets	$ 85,406,764		$ 85,406,764		$ 76,764,064	[1]
Loan loss (provision) reversal	(1,613)	$ (6,134)	(27,918)	$ (145,260)
Allowance for loan loss	0		0		27,900
Residential Mortgage Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets	1,600,000		1,600,000		2,300,000
Loans held-for-sale	$ 1,400		$ 1,400		$ 2,300
Percent of adjustable-rate loans	11.00%		11.00%		16.00%
Residential mortgage loan warehouse facility
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets	$ 70		$ 70		$ 980
[1] (1)Derived from the audited consolidated financial statements at December 31, 2021.

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