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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Thousands
4 Months Ended
Apr. 20, 2019
Apr. 21, 2018
Statement Of Income And Comprehensive Income [Abstract]    
Net earnings $ 7,469 $ 12,343
Other comprehensive income, before tax    
Pension and postretirement liability adjustment 79 111
Income tax expense related to items of other comprehensive income (19) (27)
Total other comprehensive income, after tax 60 84
Comprehensive income $ 7,529 $ 12,427