DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($) instrument institution	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) instrument institution	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) instrument
Derivative [Line Items]
Interest rate cash flow hedge expense reclassified to interest income (prior year less than)	$ 1,000	$ 100	$ 1,900	$ 200
Number of variable-rate to fixed-rate swap transactions | instrument	175		175		188
Minimum
Derivative [Line Items]
Remaining maturity period	1 year		1 year
Maximum
Derivative [Line Items]
Remaining maturity period	11 years		11 years
Designated as Hedging Instrument
Derivative [Line Items]
Notional	$ 1,200,000		$ 1,200,000		$ 750,000
Interest rate swaps and options | Designated as Hedging Instrument
Derivative [Line Items]
Count | instrument	15		15		9
Purchase of derivatives			$ 23,400
Notional	$ 1,200,000		$ 1,200,000		$ 750,000
Swap Guarantee
Derivative [Line Items]
Number of financial institutions | institution	1		1
Aggregate fair value of swaps to customers	$ 6,500		$ 6,500		7,300
Interest rate swap
Derivative [Line Items]
Notional	$ 700,000		$ 700,000		$ 700,000
Number of variable-rate to fixed-rate swap transactions | instrument	0		0		0
Cash
Derivative [Line Items]
Collateral value against obligations	$ 2,300		$ 2,300