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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Branch
Dec. 31, 2012
Dec. 31, 2011
Nature of Operations [Abstract]      
Number of bank branches 183    
Number of counties in New York where the bank has facilities 35    
Number of counties in Pennsylvania where the bank has facilities 6    
Impaired and Other Nonaccrual Loans [Abstract]      
Number of days past due for loans to be placed on nonaccrual status 90 days    
Threshold amount of individual commercial loans evaluated for impairment $ 0.5    
Premises and Equipment [Abstract]      
Other real estate 5.1 4.8  
Advertising [Abstract]      
Advertising costs $ 3.0 $ 2.6 $ 2.5
Minimum [Member] | Equipment [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 3 years    
Minimum [Member] | Software and Hardware [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 3 years    
Minimum [Member] | Building and Building Improvements [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 10 years    
Maximum [Member] | Equipment [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 10 years    
Maximum [Member] | Software and Hardware [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 7 years    
Maximum [Member] | Building and Building Improvements [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 40 years    
Maximum [Member] | Land Improvements [Member]
     
Premises and Equipment [Abstract]      
Estimated useful life 20 years    
Core Deposits [Member] | Minimum [Member]
     
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life (amortization period) 7 years    
Core Deposits [Member] | Maximum [Member]
     
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life (amortization period) 20 years    
Customer Relationships [Member] | Minimum [Member]
     
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life (amortization period) 7 years    
Customer Relationships [Member] | Maximum [Member]
     
Finite-Lived Intangible Assets [Line Items]      
Intangible asset useful life (amortization period) 12 years