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MORTGAGE SERVICING RIGHTS (Tables)
9 Months Ended
Sep. 30, 2017
Mortgage Loans on Real Estate [Abstract]  
Balance of loans serviced for others and fair value of mortgage servicing rights
(in thousands)    September 30, 2017      December 31, 2016  
Residential mortgage loans serviced for others  $120,429   $125,243 
Fair value of mortgage servicing rights   1,004    902 
Changes in mortgage servicing rights
     Three months      Nine months  
Periods ended September 30, (in thousands)    2017      2016      2017      2016  
Mortgage Servicing Rights                    
Balance, beginning of period  $241   $416   $339   $487 
Originated   15    28    53    71 
Amortization (1)   (13)   (67)   (149)   (181)
Balance, end of period  $243   $377   $243   $377 
Valuation Allowance                    
Balance, beginning of period  $(25)  $(25)  $(23)  $(3)
Decrease (increase) in impairment reserve (1)   26    7    24    (17)
Balance, end of period   1    (18)   1    (20)
Mortgage servicing rights, net  $244   $359   $244   $357 
(1)Amortization expense and changes in the impairment reserve are recorded in mortgage servicing, net.