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8. Pension and Retirement Benefit Plans(Tables)
6 Months Ended
Jun. 30, 2017
Retirement Plan [Member]  
Defined contribution plan schedule

The Company’s net periodic Retirement Plan costs are as follows (in thousands):

 

    Three Months Ended
June 30,
    Six Months Ended
June 30,
 
    2017     2016     2017     2016  
                         
Interest cost   $ 98     $ 172     $ 195     $ 344  
Service cost     188       56       375       112  
Expected return on plan assets     (169 )     (199 )     (337 )     (398 )
Net periodic expense   $ 117     $ 29     $ 233     $ 58  
Postretirement Plan [Member]  
Defined contribution plan schedule
   Three Months Ended
June 30,
   Six Months Ended
June 30,
 
   2017   2016   2017   2016 
                 
Interest cost  $21   $35   $42   $70 
Service cost   50    12    100    24 
Amortization of (gain) loss   33        66     
Net periodic expense  $104   $47   $208   $94