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Pension (Tables)
3 Months Ended
Mar. 31, 2016
Pension Tables  
Components of Net Benefit Cost

   Three Months Ended March 31,
   2016  2015
       
Components of net periodic benefit cost:          
Interest cost  $15   $15 
Service cost   6    6 
Expected return on plan assets   (23)   (23)
Amortization of prior service costs   2    2 
Amortization of actuarial loss   28    31 
   $28   $31