Annual report pursuant to Section 13 and 15(d)

PREMISES AND EQUIPMENT (Summary of Bank Premises and Equipment) (Details)

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PREMISES AND EQUIPMENT (Summary of Bank Premises and Equipment) (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Total $ 276,067,000 $ 263,382,000
Accumulated depreciation and amortization (112,238,000) (102,309,000)
Bank premises and equipment, net 163,829,000 161,073,000
Land    
Property, Plant and Equipment [Line Items]    
Total 39,845,000 44,578,000
Land Improvements and Buildings    
Property, Plant and Equipment [Line Items]    
Total 129,497,000 123,189,000
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Total 24,037,000 20,597,000
Furniture and Equipment    
Property, Plant and Equipment [Line Items]    
Total 80,191,000 71,469,000
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Total $ 2,497,000 $ 3,549,000