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, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Total $ 198,824 $ 194,039
Less accumulated depreciation and amortization 76,797 68,011
Bank premises and equipment, net 122,027 126,028
Land    
Property, Plant and Equipment [Line Items]    
Total 29,708 29,839
Land Improvements and Buildings    
Property, Plant and Equipment [Line Items]    
Total 97,341 96,943
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Total 8,760 8,313
Furniture and Equipment    
Property, Plant and Equipment [Line Items]    
Total 54,188 49,914
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Total $ 8,827 $ 9,030