PREMISES AND EQUIPMENT - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
PREMISES AND EQUIPMENT
Land	$ 39,617	$ 39,622
Buildings and improvements	106,135	105,096
Furniture, fixtures and equipment	69,224	67,505
Operating leases right of use asset	$ 7,177	$ 7,397
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets	Prepaid Expense and Other Assets
Premises and equipment, gross	$ 222,153	$ 219,620
Less: accumulated depreciation	81,597	78,550
Total premises and equipment	$ 140,556	$ 141,070