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PLEDGED ASSETS (Tables)
12 Months Ended
Dec. 31, 2016
Guarantees [Abstract]  
Securities and loans pledged to secure public and trust deposits, securities sold under agreements to repurchase, FHLBB advances and credit facilities available
  December 31, (in thousands)    2016      2015  
Securities available-for-sale (at fair value)  $63,833   $67,750 
Loans receivable   137,117    153,269 
Total pledged assets  $200,950   $221,019