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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Thousands
4 Months Ended
Apr. 18, 2020
Apr. 20, 2019
Statement Of Income And Comprehensive Income [Abstract]    
Net earnings $ 15,402 $ 7,469
Other comprehensive income, before tax    
Pension and postretirement liability adjustment 106 79
Income tax expense related to items of other comprehensive income (26) (19)
Total other comprehensive income, after tax 80 60
Comprehensive income $ 15,482 $ 7,529