FINANCIAL DERIVATIVES - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative [Line Items]
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable (includes $9,963 and $16,764, respectively, related to consolidated trusts)		Accrued interest receivable (includes $9,963 and $16,764, respectively, related to consolidated trusts)
Gain expected to be reclassified from AOCI to earnings over next 12 months	$ 14,500,000
Gain (loss) from interest rate swaps designated as cash flow hedges reclassified to earnings	0	$ 0
Financial derivatives, net payable position	0		$ 0
Notional amount	26,094,494,000		25,779,468,000
Exchange Cleared
Derivative [Line Items]
Notional amount	20,800,000,000		20,500,000,000
Interest Rate Swap
Derivative [Line Items]
Notional amount	26,100,000,000		25,800,000,000
Cleared Swaps
Derivative [Line Items]
Accrued interest on cleared swaps	17,600,000		16,400,000
Uncleared Swaps
Derivative [Line Items]
Accrued interest payable	$ 6,200,000		$ 6,500,000