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PREMISES AND EQUIPMENT (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Premises and Equipment    
Gross premises and equipment $ 140,861 $ 144,003
Accumulated depreciation and amortization (91,700) (94,789)
Net premises and equipment 49,161 49,214
Land    
Premises and Equipment    
Gross premises and equipment 9,006 9,006
Office buildings and improvements    
Premises and Equipment    
Gross premises and equipment 100,892 98,081
Furniture, fixtures and equipment    
Premises and Equipment    
Gross premises and equipment $ 30,963 $ 36,916