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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 03, 2020
Oct. 05, 2019
Oct. 03, 2020
Oct. 05, 2019
Statement Of Income And Comprehensive Income [Abstract]        
Net earnings (loss) $ 19,952 $ (337) $ 63,821 $ 318
Other comprehensive income, before tax        
Pension and postretirement liability adjustment 27 10,808 160 19,824
Income tax expense related to items of other comprehensive income (6) (2,624) (39) (4,813)
Total other comprehensive income, after tax 21 8,184 121 15,011
Comprehensive income $ 19,973 $ 7,847 $ 63,942 $ 15,329