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PREMISES AND EQUIPMENT (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Premises and equipment      
Total cost $ 97,565 $ 95,961  
Accumulated depreciation (43,464) (45,309)  
Net 54,101 50,652  
Depreciation expense 5,440 5,074 5,276
Operating Leases      
Rent expense 1,126 933 940
Rent commitments, before considering renewal options      
2013 1,026    
2014 945    
2015 798    
2016 573    
2017 406    
Thereafter 1,639    
Total 5,387    
Land
     
Premises and equipment      
Total cost 14,090 13,422  
Buildings
     
Premises and equipment      
Total cost 48,640 45,996  
Furniture and equipment
     
Premises and equipment      
Total cost $ 34,835 $ 36,543