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Pension (Tables)
3 Months Ended
Mar. 31, 2015
Pension Tables  
Components of Net Benefit Cost

   Three Months Ended March 31,
   2015  2014
       
Components of net periodic benefit cost:          
Interest cost  $15   $16 
Service cost   6    10 
Expected return on plan assets   (23)   (17)
Amortization of prior service costs   2    2 
Amortization of actuarial loss   28    35 
   $28   $46