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Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share from Continuing Operations (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 15, 2017
Jul. 16, 2016
Jul. 15, 2017
Jul. 16, 2016
Numerator:        
Earnings from continuing operations $ 21,060 $ 17,560 $ 36,125 $ 27,520
Adjustment for earnings attributable to participating securities (357) (314) (640) (492)
Earnings from continuing operations used in calculating earnings per share $ 20,703 $ 17,246 $ 35,485 $ 27,028
Denominator:        
Weighted average shares outstanding, including participating securities 37,809 37,475 37,742 37,483
Adjustment for participating securities (641) (670) (669) (670)
Shares used in calculating basic earnings per share 37,168 36,805 37,073 36,813
Effect of dilutive stock options 22 71 45 59
Shares used in calculating diluted earnings per share 37,190 36,876 37,118 36,872
Basic earnings per share from continuing operations $ 0.56 $ 0.47 $ 0.96 $ 0.73
Diluted earnings per share from continuing operations $ 0.56 $ 0.47 $ 0.96 $ 0.73