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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]      
Net earnings (loss) $ 33,572 $ (52,845) $ 56,828
Other comprehensive (loss) income, before tax      
Pension and postretirement liability adjustment (822) (1,649) 14
Income tax benefit (expense) related to items of other comprehensive income 199 632 (4)
Total other comprehensive (loss) income, after tax (623) (1,017) 10
Comprehensive income (loss) $ 32,949 $ (53,862) $ 56,838