DERIVATIVES AND HEDGING - Derivatives and Hedges Recorded at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Derivative and hedging assets		$ 75,147	$ 28,080
Derivative and Hedging Liabilities:		52,610	51,765
Derivative liabilities, other commitments	$ 25,500
Interest rate swaps
Derivative [Line Items]
Derivative and hedging assets		6	106
Derivative asset, variation margin accounts		42,000	342,000
IRLCs
Derivative [Line Items]
Derivative and hedging assets		21,496	26,482
Derivative and Hedging Liabilities:		10,202	2,678
TBAs
Derivative [Line Items]
Derivative and hedging assets		50,809	1,492
Derivative and Hedging Liabilities:		15,628	49,087
Foreign exchange forwards
Derivative [Line Items]
Derivative and hedging assets		2,836	0
Treasury short sales
Derivative [Line Items]
Derivative and Hedging Liabilities:		1,245	0
Derivative liabilities, reverse repurchase agreements		503,900
Other commitments
Derivative [Line Items]
Derivative and Hedging Liabilities:		25,521	0
Stock options
Derivative [Line Items]
Derivative and Hedging Liabilities:		$ 14	$ 0