DERIVATIVE FINANCIAL INSTRUMENTS - Corporation's Derivatives Designated as Hedges (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Asset Derivatives	$ 114,541	$ 93,036
Liability Derivatives	114,014	92,770
Interest rate swaps on borrowings | Derivatives Designated as Hedges | Other Assets
Derivative [Line Items]
Asset Derivatives	0	164
Interest rate swaps on borrowings | Derivatives Designated as Hedges | Other Liabilities
Derivative [Line Items]
Liability Derivatives	$ 0	$ 0