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Accumulated Other Comprehensive Income
 6 Months Ended
Jun. 27, 2020
Equity [Abstract]  
Accumulated Other Comprehensive Income
11 Accumulated Other Comprehensive Income
The components of accumulated other comprehensive income (loss) are detailed as follows (in thousands):
    
Currency Translation
     
Unrealized Gain (Loss)
on Retirement Plans
     
Accumulated Other
Comprehensive Loss
  
Balance at December 31, 2019
  $
(104,066
 )   $
(15,405
 )   $
(119,471
 )
Other comprehensive income (loss), net of tax
   
(7,757
)     
338
     
(7,419
)
                         
Balance at June 27, 2020
  $
(111,822
)    $
(15,067
 )    $
(126,890
 )