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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]  
Schedule of periodic costs for employee retirement benefit plan

   (In Thousands)
   Pension Benefits  Other Benefits
   Three Months Ended September 30,
   2016  2015  2016  2015
             
Service Cost  $577   $639   $275   $343 
Interest Cost   761    724    488    480 
Expected Return on Assets   (1,004)   (980)   (558)   (527)
Amortization of Unrecognized Losses   357    411    443    565 
Amortization of Unrecognized Prior Service Cost (Credit)   —    —    (432)   (432)
Net Periodic Benefit Cost  $691   $794   $216   $429 

 

 

   (In Thousands)
   Pension Benefits  Other Benefits
   Nine Months Ended September 30,
   2016  2015  2016  2015
             
Service Cost  $1,731   $1,918   $824   $1,029 
Interest Cost   2,284    2,171    1,464    1,441 
Expected Return on Assets   (3,011)   (2,939)   (1,674)   (1,580)
Amortization of Unrecognized Losses   1,070    1,234    1,330    1,696 
Amortization of Unrecognized Prior Service Cost (Credit)   —    —    (1,296)   (1,296)
Net Periodic Benefit Cost  $2,074   $2,384   $648   $1,290