DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivative Financial Instruments and Their Classification on Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Fair Value
Assets Derivatives	$ 87,777	$ 79,379
Liabilities Derivatives	87,236	79,008
Derivatives Not Designated as Hedging Instruments | Other Assets
Notional Amount
Included in other assets	1,374,068	1,393,813
Fair Value
Assets Derivatives	87,777	79,379
Derivatives Not Designated as Hedging Instruments | Other Liabilities
Notional Amount
Included in other liabilities	1,353,123	1,382,262
Fair Value
Liabilities Derivatives	87,236	79,008
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Other Assets
Notional Amount
Included in other assets	1,299,892	1,355,947
Fair Value
Assets Derivatives	86,965	78,743
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Other Liabilities
Notional Amount
Included in other liabilities	1,299,892	1,355,947
Fair Value
Liabilities Derivatives	87,015	78,811
Derivatives Not Designated as Hedging Instruments | Forward contracts related to mortgage loans to be delivered for sale | Other Assets
Notional Amount
Included in other assets	46,801	15,160
Fair Value
Assets Derivatives	605	469
Derivatives Not Designated as Hedging Instruments | Forward contracts related to mortgage loans to be delivered for sale | Other Liabilities
Notional Amount
Included in other liabilities	30,948	25,290
Fair Value
Liabilities Derivatives	129	191
Derivatives Not Designated as Hedging Instruments | Interest rate lock commitments | Other Assets
Notional Amount
Included in other assets	27,375	22,706
Fair Value
Assets Derivatives	207	167
Derivatives Not Designated as Hedging Instruments | Interest rate lock commitments | Other Liabilities
Notional Amount
Included in other liabilities	22,283	1,025
Fair Value
Liabilities Derivatives	$ 92	$ 6