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Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share for Continuing Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Oct. 04, 2014
Oct. 12, 2013
Oct. 04, 2014
Oct. 12, 2013
Numerator:        
Earnings from continuing operations $ 17,169 $ 6,659 $ 47,083 $ 23,627
Adjustment for earnings attributable to participating securities (280) (155) (820) (564)
Earnings from continuing operations used in calculating earnings per share $ 16,889 $ 6,504 $ 46,263 $ 23,063
Denominator:        
Weighted average shares outstanding, including participating securities 37,717 21,876 37,678 21,820
Adjustment for participating securities (616) (508) (656) (521)
Shares used in calculating basic earnings per share 37,101 21,368 37,022 21,299
Effect of dilutive stock options 61 93 71 88
Shares used in calculating diluted earnings per share 37,162 21,461 37,093 21,387
Basic earnings per share from continuing operations $ 0.46 $ 0.30 $ 1.25 $ 1.08
Diluted earnings per share from continuing operations $ 0.45 $ 0.30 $ 1.25 $ 1.08