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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2017
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 June 30,
   2017  2016  2017  2016
             
Service Cost  $600   $577   $272   $275 
Interest Cost   786    761    491    488 
Expected Return on Assets   (1,122)   (1,004)   (601)   (558)
Amortization of Unrecognized Losses   391    357    445    443 
Amortization of Unrecognized Prior Service Cost (Credit)   —    —    (432)   (432)
Net Periodic Benefit Cost  $655   $691   $175   $216 

 

   (In Thousands)
   Pension Benefits  Other Benefits
   Six Months Ended June 30,
   2017  2016  2017  2016
             
Service Cost  $1,200   $1,154   $544   $550 
Interest Cost   1,572    1,523    982    976 
Expected Return on Assets   (2,245)   (2,007)   (1,203)   (1,116)
Amortization of Unrecognized Losses   783    713    890    886 
Amortization of Unrecognized Prior Service Cost (Credit)   —    —    (864)   (864)
Net Periodic Benefit Cost  $1,310   $1,383   $349   $432