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PENSION AND POSTRETIREMENT PLANS (Tables)
3 Months Ended
Mar. 31, 2018
EMPLOYEE BENEFITS  
Schedule of components of net periodic benefit (credit) cost
    Three Months Ended March 31,  
    Pension Benefits     SERP Benefits  
(In thousands)   2018     2017     2018     2017  
Service cost   $ 325     $ 293     $ 73     $ 53  
Interest cost     197       184       32       26  
Expected return on plan assets     (625 )     (520 )     -       -  
Amortization of net loss     83       113       30       13  
Amortization of prior service credit     (19 )     (19 )     -       -  
Amortization of transition obligation     -       -       1       7  
Net periodic benefit (credit) cost   $ (39 )   $ 51     $ 136     $ 99