Stock Option Activity (Detail) - Stock Option $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 08, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding at beginning of period | shares	4,353
Options, Exercised | shares	(1,716)
Options, Outstanding at end of period | shares	2,637
Options, Exercisable at end of period | shares	2,637
Weighted Average Exercise Price, Outstanding at beginning of year | $ / shares	$ 10.97
Weighted Average Exercise Price, Exercised | $ / shares	10.99
Weighted Average Exercise Price, Outstanding at end of period | $ / shares	10.95
Weighted Average Exercise Price, Exercisable at end of period | $ / shares	$ 10.95
Weighted Average Remaining Contractual Term (Years), Outstanding at end of period	10 months 28 days
Weighted Average Remaining Contractual Term (Years), Exercisable at end of period	10 months 28 days
Aggregate Intrinsic Value, Outstanding at end of period | $	$ 9,907
Aggregate Intrinsic Value, Exercisable at end of period | $	$ 9,907