Stock Option Activity (Detail) - Jul. 18, 2015 - Stock Option - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding at beginning of period	6,191
Options, Exercised	(258)
Options, Outstanding at end of period	5,933
Options, Exercisable at end of period	5,933
Weighted Average Exercise Price, Outstanding at beginning of period	$ 10.88
Weighted Average Exercise Price, Exercised	10.83
Weighted Average Exercise Price, Outstanding at end of period	10.88
Weighted Average Exercise Price, Exercisable at end of period	$ 10.88
Weighted Average Remaining Contractual Term (Years), Outstanding at end of period	1 year 6 months 22 days
Weighted Average Remaining Contractual Term (Years), Exercisable at end of period	1 year 6 months 22 days
Aggregate Intrinsic Value, Outstanding at end of period	$ 59,609
Aggregate Intrinsic Value, Exercisable at end of period	$ 59,609