PREMISES, FURNITURE AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total	$ 278,056	$ 295,869
Less accumulated depreciation	(101,055)	(105,390)
Premises, furniture and equipment, net	177,001	190,479
Depreciation expense	11,700	13,200	$ 13,500
Land and land improvements
Property, Plant and Equipment [Line Items]
Total	53,434	56,599
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Total	168,244	172,585
Depreciation expense	6,000	6,300	6,900
Furniture and equipment
Property, Plant and Equipment [Line Items]
Total	56,378	66,685
Depreciation expense	$ 5,700	$ 6,900	$ 6,600