LOANS - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets		$ 91,483,546	$ 86,832,017	$ 93,227,236	[1]
Loan loss provision (reversal)		0	$ (219)
Warehouse facility outstanding balance	[2]	2,717,823		2,353,084	[1]
Allowance for loan loss		0
Residential Mortgage Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets		2,700,000		2,400,000
Loans held-for-sale		$ 3,600		$ 1,200
Percent of adjustable-rate loans		15.00%		11.00%

[1] (1)Derived from the audited consolidated financial statements at December 31, 2023.

[2] (4)Includes $3.6 million and $1.2 million of residential mortgage loans held for sale at March 31, 2024 and December 31, 2023, respectively.