DERIVATIVES - Derivatives Recorded at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Derivative assets	$ 63,532	$ 52,229
Derivative liabilities	9,639	18,064
Interest rate swaps
Derivative [Line Items]
Derivative assets	350	449
Derivative asset, variation margin accounts	1,100,000	1,200,000
Interest rate lock commitments
Derivative [Line Items]
Derivative assets	13,751	16,015
Derivative liabilities	7,253	7,229
TBAs
Derivative [Line Items]
Derivative assets	49,431	35,765
Derivative liabilities	2,386	10,835
Options on treasury futures
Derivative [Line Items]
Derivative assets	$ 0	$ 0