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 ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Total $ 240,519 $ 203,126
Less accumulated depreciation and amortization 93,552 83,522
Bank premises and equipment, net 146,967 119,604
Land    
Property, Plant and Equipment [Line Items]    
Total 41,494 29,706
Land Improvements and Buildings    
Property, Plant and Equipment [Line Items]    
Total 119,649 99,199
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Total 10,266 9,712
Furniture and Equipment    
Property, Plant and Equipment [Line Items]    
Total 62,154 56,000
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Total $ 6,956 $ 8,509