PREMISES AND EQUIPMENT - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Premises and Equipment [Line Items]
Total Cost	$ 360,357	$ 344,718
Accumulated Depreciation and Amortization	(226,461)	(227,600)
Net	133,896	117,118
Land
Premises and Equipment [Line Items]
Total Cost	25,655	25,299
Buildings and Leasehold Improvements
Premises and Equipment [Line Items]
Total Cost	186,444	174,895
Equipment
Premises and Equipment [Line Items]
Total Cost	$ 148,258	$ 144,524