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Summary of Significant Accounting Policies and Basis of Presentation - Schedule of Computation of Basic and Diluted EPS For Continuing Operations (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 4 Months Ended 9 Months Ended 12 Months Ended
Jan. 02, 2016
Oct. 10, 2015
Jul. 18, 2015
Jan. 03, 2015
Oct. 04, 2014
Jul. 12, 2014
Apr. 25, 2015
Apr. 19, 2014
Dec. 28, 2013
Jan. 02, 2016
Jan. 03, 2015
Numerator:                      
Earnings from continuing operations $ 17,164 $ 15,248 $ 20,307 $ 12,037 $ 17,169 $ 17,395 $ 10,447 $ 12,519 $ 1,229 $ 63,166 $ 59,120
Adjustment for earnings attributable to participating securities                 (26) (1,098) (1,015)
Earnings from continuing operations used in calculating earnings per share                 $ 1,203 $ 62,068 $ 58,105
Denominator:                      
Weighted average shares outstanding, including participating securities                 24,137 37,612 37,641
Adjustment for participating securities                 (519) (654) (646)
Shares used in calculating basic earnings per share                 23,618 36,958 36,995
Effect of dilutive stock options                 92 106 69
Shares used in calculating diluted earnings per share                 23,710 37,064 37,064
Basic earnings per share from continuing operations $ 0.46 $ 0.41 $ 0.54 $ 0.32 $ 0.46 $ 0.46 $ 0.28 $ 0.33 $ 0.05 $ 1.68 $ 1.57
Diluted earnings per share from continuing operations $ 0.46 $ 0.40 $ 0.54 $ 0.32 $ 0.45 $ 0.46 $ 0.28 $ 0.33 $ 0.05 $ 1.67 $ 1.57