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FINANCIAL INSTRUMENTS (Tables)
12 Months Ended
Dec. 31, 2016
Investments, All Other Investments [Abstract]  
Financial instrument liabilities with off-balance sheet credit risk
December 31, (in thousands)    2016      2015  
Residential  $6,150   $6,620 
Home equity lines of credit   26,491    25,912 
Commercial   5,624    13,922 
Land   116    218 
Real estate secured   38,381    46,672 
Commercial and industrial   56,178    67,725 
Municipal   250    790 
Consumer   1,464    1,507 
Unadvanced portions of loans   96,273    116,694 
Commitments to originate loans   30,776    37,688 
Letters of credit   1,112    1,401 
Total  $128,161   $155,783