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MORTGAGE SERVICING RIGHTS (Tables)
9 Months Ended
Sep. 30, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]  
Balance of loans serviced for others and fair value of mortgage servicing rights
(in thousands)    September 30, 2018      December 31, 2017  
Residential mortgage loans serviced for others  $111,957   $117,538 
Fair value of mortgage servicing rights   1,034    1,010 
Changes in mortgage servicing rights

     Three months ended      Nine months ended  
Periods ended September 30, (in thousands)    2018      2017      2018      2017  
Mortgage Servicing Rights                    
Balance, beginning of period  $217   $241   $233   $339 
Originated   11    15    18    53 
Amortization (1)   (11)   (13)   (34)   (149)
Balance, end of period  $217   $243   $217   $243 
Valuation Allowance                    
Balance, beginning of period  $   $(25)  $   $(23)
Decrease (increase) in impairment reserve (1)       26        24 
Balance, end of period  $   $1   $   $1 
Mortgage servicing rights, net  $217   $244   $217   $244 
(1)Amortization expense and changes in the impairment reserve are recorded in mortgage servicing, net.