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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2018
Retirement Benefits [Abstract]  
Schedule of periodic costs for employee retirement benefit plan

The following tables set forth information relating to the Company’s periodic costs for its employee retirement benefit plans:

 

   (In Thousands)
   Pension Benefits  Other Benefits
   Three Months Ended September 30,
   2018  2017  2018  2017
             
Service Cost  $607   $600   $284   $272 
Interest Cost   765    786    474    491 
Expected Return on Assets   (1,218)   (1,122)   (637)   (601)
Amortization of Unrecognized Losses   415    391    447    445 
Amortization of Unrecognized Prior Service Cost (Credit)   —    —    (402)   (432)
Net Periodic Benefit Cost*  $569   $655   $166   $175 

 

   (In Thousands)
   Pension Benefits  Other Benefits
   Nine Months Ended September 30,
   2018  2017  2018  2017
             
Service Cost  $1,820   $1,799   $851   $817 
Interest Cost   2,296    2,357    1,423    1,473 
Expected Return on Assets   (3,653)   (3,367)   (1,912)   (1,804)
Amortization of Unrecognized Losses   1,244    1,174    1,340    1,336 
Amortization of Unrecognized Prior Service Cost (Credit)   —    —    (1,205)   (1,296)
Net Periodic Benefit Cost*  $1,707   $1,963   $497   $526 
                     
*Service cost is included in Operations and Maintenance expense on Consolidated Statements of Income; all other amounts are included in Other Income/Expense, net.