DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) institution instrument	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) institution instrument	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) instrument
Derivative [Line Items]
Interest rate cash flow hedge expense reclassified to interest income (prior year less than)	$ 1,300	$ 400	$ 3,100	$ 600
Number of variable-rate to fixed-rate swap transactions | instrument	161		161		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	$ 1,500,000		$ 1,500,000		$ 750,000
Interest rate swaps and options | Designated as Hedging Instrument
Derivative [Line Items]
Count | instrument	18		18		9
Purchase of derivatives			$ 29,700
Notional	$ 1,500,000		1,500,000		$ 750,000
Swap Guarantee
Derivative [Line Items]
Notional	$ 100		$ 100
Number of financial institutions | institution	1		1
Aggregate fair value of swaps to customers	$ 6,000		$ 6,000		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	1		1		0
Cash
Derivative [Line Items]
Collateral value against obligations	$ 3,700		$ 3,700