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Share-Based Compensation - Summary of Share Option Awards (Detail) - Jun. 28, 2015 - USD ($)
Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Shares, Outstanding at December 28, 2014 729,905
Shares, Granted 10,000
Shares, Exercised (7,925)
Shares, Forfeited or Expired (2,800)
Shares, Outstanding at June 28, 2015 729,180
Shares, Exercisable at June 28, 2015 678,055
Shares, Vested and Expected to Vest at June 28, 2015 728,669
Weighted-Average Exercise Price, Outstanding at December 28, 2014 $ 15.73
Weighted-Average Exercise Price, Granted 14.66
Weighted-Average Exercise Price, Exercised 6.12
Weighted-Average Exercise Price, Forfeited or Expired 19.12
Weighted-Average Exercise Price, Outstanding at June 28, 2015 15.80
Weighted-Average Exercise Price, Exercisable at June 28, 2015 16.00
Weighted-Average Exercise Price, Vested and Expected to Vest at June 28, 2015 $ 15.80
Weighted-Average Remaining Contractual Life (In Years), Outstanding at June 28, 2015 2 years 7 months 6 days
Weighted-Average Remaining Contractual Life (In Years), Exercisable at June 28, 2015 2 years 1 month 6 days
Weighted-Average Remaining Contractual Life (In Years), Vested and Expected to Vest at June 28, 2015 2 years 7 months 6 days
Aggregate Intrinsic Value, Outstanding at June 28, 2015 $ 1,907,777
Aggregate Intrinsic Value, Exercisable at June 28, 2015 1,785,624
Aggregate Intrinsic Value, Vested and Expected to Vest at June 28, 2015 $ 1,907,219