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Off Balance Sheet Activities (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Outstanding Financial Instruments Whose Contract Amounts Represent Credit Risk

At December 31, 2016 and 2015, the following financial instruments were outstanding whose contract amounts represent credit risk:

 

     (In Thousands)  
     2016      2015  

Commitments to extend credit

   $ 223,534       $ 246,321   

Credit card arrangements

     18,316         16,100   

Standby letters of credit

     875         770