PREMISES AND EQUIPMENT - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Premises and equipment [Abstract]
Premises and equipment, gross	$ 86,863	$ 86,539
Less accumulated depreciation and amortization	71,462	70,164
Net book value	15,401	16,375
Land
Premises and equipment [Abstract]
Premises and equipment, gross	4,298	4,298
Buildings
Premises and equipment [Abstract]
Premises and equipment, gross	39,602	39,462
Projects in progress
Premises and equipment [Abstract]
Premises and equipment, gross	11	78
Equipment and furniture
Premises and equipment [Abstract]
Premises and equipment, gross	37,251	36,975
Leasehold improvements
Premises and equipment [Abstract]
Premises and equipment, gross	$ 5,701	$ 5,726