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Pension (Tables)
3 Months Ended
Mar. 31, 2019
Pension And Profit Sharing Tables Abstract  
Components of Net Benefit Cost

Components of net periodic benefit cost are as follows (in thousands):

   Three Months Ended March 31,
   2019  2018
       
Service cost  $9   $9 
           
Interest cost  $9   $10 
Expected return on plan assets   (14)   (17)
Amortization of actuarial loss   22    22 
     Total non-service cost  $17   $15 
           
Net periodic pension cost  $26   $24