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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 14, 2018
Jul. 15, 2017
Jul. 14, 2018
Jul. 15, 2017
Statement Of Income And Comprehensive Income [Abstract]        
Net earnings $ 17,772 $ 21,029 $ 30,115 $ 36,054
Other comprehensive income, before tax        
Pension and postretirement liability adjustment 84 31 195 72
Total other comprehensive income, before tax 84 31 195 72
Income tax expense related to items of other comprehensive income (21) (11) (48) (27)
Total other comprehensive income, after tax 63 20 147 45
Comprehensive income $ 17,835 $ 21,049 $ 30,262 $ 36,099