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Retirement Plans (Tables)
6 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Defined Benefit Plan, Net Periodic Benefit Cost

The summary of the components of net periodic pension costs for the plans for the three and six months ended June 30, 2018 and July 1, 2017 is as follows (in thousands):

 

     Three Months Ended  
     June 30, 2018     July 1, 2017  
     U.S.
Pension
Plans
    U.S. Retiree
Healthcare
Plan
    Non-U.S.
Pension
Plans
    U.S.
Pension
Plans
    U.S. Retiree
Healthcare
Plan
    Non-U.S.
Pension
Plans
 

Service cost

   $ 142     $ 151     $ 1,339     $ 124     $ 170     $ 1,240  

Interest cost

     1,627       162       416       1,696       159       368  

Expected return on plan assets

     (630     (175     (481     (2,487     (147     (414

Net amortization:

            

Prior service credit

     —         (2     (32     —         —         (47

Net actuarial loss

     772       —         171       734       —         235  
  

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Net periodic pension cost

   $ 1,911     $ 136     $ 1,413     $ 67     $ 182     $ 1,382  
  

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

 

     Six Months Ended  
     June 30, 2018     July 1, 2017  
     U.S.
Pension
Plans
    U.S. Retiree
Healthcare
Plan
    Non-U.S.
Pension
Plans
    U.S.
Pension
Plans
    U.S. Retiree
Healthcare
Plan
    Non-U.S.
Pension
Plans
 

Service cost

   $ 284     $ 283     $ 2,713     $ 225     $ 273     $ 2,491  

Interest cost

     3,246       318       844       3,415       309       726  

Expected return on plan assets

     (3,415     (353     (974     (5,150     (294     (816

Net amortization:

            

Prior service credit

     —         (10     (63     —         —         (93

Net actuarial loss

     1,541       —         348       1,385       —         466  
  

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Net periodic pension cost (benefit)

   $ 1,656     $ 238     $ 2,868     $ (125   $ 288     $ 2,774