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Earnings Per Share (Details) - shares
shares in Thousands
4 Months Ended 6 Months Ended
Jul. 13, 2019
Jul. 14, 2018
Jul. 13, 2019
Jul. 14, 2018
Earnings Per Share        
Weighted average common shares outstanding 14,472 14,424 14,462 14,407
Dilutive effect of stock options and restricted stock units 23 26 23 24
Weighted average common shares outstanding, assuming dilution 14,495 14,450 14,485 14,431