DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) institution instrument	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) instrument
Derivative [Line Items]
Interest rate cash flow hedge expense reclassified to interest income (prior year less than)	$ 800	$ 100
Number of variable-rate to fixed-rate swap transactions | instrument	185		188
Minimum
Derivative [Line Items]
Remaining maturity period	1 year
Maximum
Derivative [Line Items]
Remaining maturity period	11 years
Swap Guarantee
Derivative [Line Items]
Number of financial institutions | institution	1
Aggregate fair value of swaps to customers	$ 6,900		$ 7,300
Interest rate swap
Derivative [Line Items]
Notional	$ 700,000		$ 700,000
Number of variable-rate to fixed-rate swap transactions | instrument	0		0
Cash
Derivative [Line Items]
Collateral value against obligations	$ 2,500
Designated as Hedging Instrument
Derivative [Line Items]
Notional	$ 1,000,000		$ 750,000
Designated as Hedging Instrument | Interest rate products
Derivative [Line Items]
Count | instrument	13		9
Purchase of derivatives	$ 19,700
Notional	$ 1,000,000		$ 750,000