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Short-Term Borrowings (Tables)
12 Months Ended
Dec. 31, 2016
Short-Term Borrowings [Abstract]  
Summary Of Short-Term Borrowings
    2016     2015  
      Weighted       Weighted  
    Total Average     Total Average  
    Principal Rate     Principal Rate  
 
Federal Home Loan Bank Advances $ 372,700 0.97 % $ 313,000 0.54 %
Securities sold under agreements to repurchase   21,780 0.29   20,909 0.28
Total short-term borrowings $ 394,480     $ 333,909    
Short-Term Federal Home Loan Bank Borrowings
    2016   2015
 
Average daily balance during the year $ 357,848 $ 295,479
Maximum month-end balance during the year $ 410,050 $ 342,000
Amount outstanding at end of year $ 372,700 $ 313,000
Securities Sold Under Agreements To Repurchase
    2016     2015  
 
Average daily balance during the year $ 17,529   $ 17,001  
Average interest rate during the year   0.29 %   0.28 %
Maximum month-end balance during the year $ 21,780   $ 21,239  
Amount outstanding at end of year 21,780   20,909  
Securities Collateralizing Repurchase Agreements
    2016   2015
Carrying value $ 28,206 $ 28,324
Estimated fair value   28,130   28,981