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Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Retirement Benefits [Abstract]      
Net actuarial loss $ 9,777 $ 12,261  
Prior service (cost) 1,607 0  
Net amount recognized, pre-tax 11,384 12,261  
Estimated net actuarial loss which will be amortized from accumulated other comprehensive income (loss) into benefit cost in 2019 200    
Amortization of prior service 291 337 $ 306
Net actuarial loss (396)    
Settlement loss 238 $ (25) $ (36)
Foreign currency adjustments 744    
Total $ 877