Stock Option Activity (Detail) (Stock Option, USD $) In Thousands, except Share data, unless otherwise specified	4 Months Ended
	Apr. 20, 2013
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, Outstanding at beginning of period	6,360,000
Options, Granted
Options, Exercised	(9,000)
Options, Forfeited	(9,000)
Options, Outstanding at end of period	6,342,000
Options, Exercisable at end of period	4,253,000
Weighted Average Exercise Price, Outstanding at beginning of period	$ 16.08
Weighted Average Exercise Price, Granted
Weighted Average Exercise Price, Exercised	$ 16.20
Weighted Average Exercise Price, Forfeited	$ 16.48
Weighted Average Exercise Price, Outstanding at end of period	$ 16.08
Weighted Average Exercise Price, Exercisable at end of period	$ 15.96
Weighted Average Remaining Contractual Term (Years), Outstanding at end of period	3 years 5 months 9 days
Weighted Average Remaining Contractual Term (Years), Exercisable at end of period	2 years 9 months 4 days
Aggregate Intrinsic Value, Outstanding at end of period	$ 102,377
Aggregate Intrinsic Value, Exercisable at end of period	$ 69,071