DERIVATIVE FINANCIAL INSTRUMENTS - Fair Value of Derivative Financial Instruments and Their Classification on Balance Sheet (Details) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Other Assets
Notional Amount
Included in other assets	$ 1,226,687	$ 1,038,947
Fair Value
Asset Derivatives	98,919	41,133
Other Liabilities
Notional Amount
Included in other liabilities	1,225,478	1,038,947
Fair Value
Liability Derivatives	98,809	41,133
Interest rate swaps | Other Assets
Notional Amount
Included in other assets	1,200,105	1,038,947
Fair Value
Asset Derivatives	98,280	41,133
Interest rate swaps | Other Liabilities
Notional Amount
Included in other liabilities	1,200,105	1,038,947
Fair Value
Liability Derivatives	98,280	41,133
Forward contracts related to mortgage loans to be delivered for sale | Other Assets
Notional Amount
Included in other assets	21,333	0
Fair Value
Asset Derivatives	612	0
Forward contracts related to mortgage loans to be delivered for sale | Other Liabilities
Notional Amount
Included in other liabilities	8,527	0
Fair Value
Liability Derivatives	172	0
Interest rate lock commitments | Other Assets
Notional Amount
Included in other assets	5,249	0
Fair Value
Asset Derivatives	27	0
Interest rate lock commitments | Other Liabilities
Notional Amount
Included in other liabilities	16,846	0
Fair Value
Liability Derivatives	$ 357	$ 0