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PLEDGED ASSETS (Tables)
6 Months Ended
Jun. 30, 2017
Guarantees [Abstract]  
Securities and loans pledged to secure public and trust deposits, securities sold under agreements to repurchase, FHLBB advances and credit facilities available
(in thousands)    June 30, 2017      December 31, 2016  
Securities available-for-sale (at fair value)  $70,009   $63,833 
Loans receivable (at book value)   193,833    203,145 
Total pledged assets  $263,842   $266,978