PREMISES, FURNITURE AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total	$ 295,869	$ 309,582
Less accumulated depreciation	(105,390)	(104,583)
Premises, furniture and equipment, net	190,479	204,999
Depreciation expense	13,200	13,500	$ 11,800
Land and land improvements
Property, Plant and Equipment [Line Items]
Total	56,599	59,195
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Total	172,585	177,296
Depreciation expense	6,300	6,900	6,500
Furniture and equipment
Property, Plant and Equipment [Line Items]
Total	66,685	73,091
Depreciation expense	$ 6,900	$ 6,600	$ 5,300