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Short-Term Borrowings (Tables)
 12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Summary of Federal Funds Purchased and Other Short-term Borrowings

Short-term borrowings, which consist of federal funds purchased and other short-term borrowings are summarized as follows:

 

    At December 31, 2015     At December 31, 2014  
    Federal           Federal        
    Funds     Short-term     Funds     Short-term  
    Purchased     Borrowings     Purchased     Borrowings  

Outstanding balance at year end

   $ —        $ 53,700      $ —        $ 42,700   

Maximum indebtedness during the year

     —          64,700        —          42,700   

Average balance during the year

     69        26,880        41        1,951   

Average rate paid during the year

     0.53 %      0.20 %      0.54 %      0.19 % 

Interest rate on year end balance

     —          0.35 %      —          0.14 % 
    At December 31, 2013              
    Federal                    
    Funds     Short-term              
    Purchased     Borrowings        

Outstanding balance at year end

   $ —        $ —       

Maximum indebtedness during the year

     —          —       

Average balance during the year

     28        —       

Average rate paid during the year

     0.53 %      —       

Interest rate on year end balance

     —          —