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, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Total $ 263,382,000 $ 240,519,000
Less accumulated depreciation and amortization 102,309,000 93,552,000
Bank premises and equipment, net 161,073,000 146,967,000
Land    
Property, Plant and Equipment [Line Items]    
Total 44,578,000 41,494,000
Land Improvements and Buildings    
Property, Plant and Equipment [Line Items]    
Total 123,189,000 119,649,000
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Total 20,597,000 10,266,000
Furniture and Equipment    
Property, Plant and Equipment [Line Items]    
Total 71,469,000 62,154,000
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Total $ 3,549,000 $ 6,956,000