BANK PREMISES AND EQUIPMENT (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total cost	$ 323,944,000	$ 307,134,000
Accumulated depreciation	(127,440,000)	(111,544,000)
Net bank premises and equipment	196,504,000	195,590,000
Depreciation expense	18,400,000	12,500,000	$ 12,800,000
Rental Income, Nonoperating	6,100,000	890,000	$ 1,500,000
Land [Member]
Property, Plant and Equipment [Line Items]
Total cost	52,844,000	54,295,000
Bank Premises [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 97,760,000	96,887,000
Bank Premises [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Bank Premises [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 47,098,000	45,263,000
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	1 year
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 93,450,000	89,029,000
Furniture and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	1 year
Furniture and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 32,792,000	$ 21,660,000		$ 32,800,000
Machinery and Equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years