PREMISES AND EQUIPMENT - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Gross premises and equipment	$ 216,467	$ 189,963
Less: Accumulated depreciation	100,864	102,668
Net premises and equipment	115,603	87,295
Depreciation expense of premises and equipment	24,152	15,410	$ 14,999
Land
Property, Plant and Equipment [Line Items]
Gross premises and equipment	33,932	18,469
Buildings
Property, Plant and Equipment [Line Items]
Gross premises and equipment	49,406	34,481
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross premises and equipment	77,845	66,098
Furniture and equipment
Property, Plant and Equipment [Line Items]
Gross premises and equipment	55,284	70,915
Land, Buildings, Leasehold Improvements, Furniture and Equipment
Property, Plant and Equipment [Line Items]
Depreciation expense of premises and equipment	$ 20,900	$ 13,500	$ 14,300