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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 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 March 31,
   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 Credit           (432)   (432)
Net Periodic Benefit Cost  $655   $691   $175   $216