DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivative Financial Instruments and Their Classification on Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value
Asset Derivatives	$ 92,753	$ 93,036
Liability Derivatives	92,219	92,770
Other Assets | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other assets	1,345,967	1,204,321
Fair Value
Asset Derivatives	92,687	92,872
Other Liabilities | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other liabilities	1,324,663	1,196,898
Fair Value
Liability Derivatives	92,219	92,770
Interest rate swaps | Other Assets | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other assets	1,276,665	1,184,866
Fair Value
Asset Derivatives	92,086	92,652
Interest rate swaps | Other Liabilities | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other liabilities	1,276,665	1,184,866
Fair Value
Liability Derivatives	92,053	92,652
Forward contracts related to mortgage loans to be delivered for sale | Other Assets | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other assets	56,798	14,406
Fair Value
Asset Derivatives	522	188
Forward contracts related to mortgage loans to be delivered for sale | Other Liabilities | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other liabilities	15,311	4,483
Fair Value
Liability Derivatives	30	63
Interest rate lock commitments | Other Assets | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other assets	12,504	5,049
Fair Value
Asset Derivatives	79	32
Interest rate lock commitments | Other Liabilities | Derivatives Not Designated as Hedging Instruments
Notional Amount
Included in other liabilities	32,687	7,549
Fair Value
Liability Derivatives	$ 136	$ 55