PREMISES AND EQUIPMENT, NET - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Premises and equipment gross	$ 116,384	$ 115,292
Accumulated depreciation	(45,592)	(41,168)
Premises and equipment, net	70,792	74,124
Land
Property, Plant and Equipment [Line Items]
Premises and equipment gross	15,696	16,158
Buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment gross	67,143	65,932
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment gross	$ 33,545	$ 33,202