DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) instrument institution	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) instrument
Derivative [Line Items]
Interest rate cash flow hedge expense reclassified to interest income (prior year less than)	$ 1,700	$ 800
Number of variable-rate to fixed-rate swap transactions | instrument	145		154
Derivative, net liability position, aggregate fair value	$ 600		$ 0
Minimum
Derivative [Line Items]
Remaining maturity period	1 year
Maximum
Derivative [Line Items]
Remaining maturity period	11 years
Derivatives in Cash Flow Hedging Relationships
Derivative [Line Items]
Notional	$ 1,500,000		$ 1,500,000
Interest rate swaps and options | Derivatives in Cash Flow Hedging Relationships
Derivative [Line Items]
Count | instrument	18		18
Purchase of derivatives	$ 29,700
Notional	$ 1,500,000		$ 1,500,000
Swap Guarantee
Derivative [Line Items]
Number of financial institutions | institution	1
Aggregate fair value of swaps to customers	$ 5,200		5,500
Interest rate swap
Derivative [Line Items]
Notional	$ 600,000		$ 600,000
Number of variable-rate to fixed-rate swap transactions | instrument	0		0
Cash
Derivative [Line Items]
Collateral value against obligations	$ 600