PREMISES, EQUIPMENT AND LEASES - Premises and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Lease right-of-use assets	$ 8,057	$ 7,001
Total	136,262	128,923
Accumulated depreciation	(53,521)	(50,630)
Premises and equipment, net	82,741	78,293
Land
Property, Plant and Equipment [Line Items]
Premises and equipment gross	15,968	16,004
Buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment gross	77,270	71,837
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment gross	$ 34,967	$ 34,081