Equity and Incentive Compensation Plans - Summary of Stock Option Activity (Parenthetical) (Detail)	3 Months Ended		9 Months Ended
	Oct. 27, 2012		Oct. 27, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	0	[1]	524,750	[1]
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted annual vesting period	3 years
Options granted expiration period	10 years

[1] Options vest annually over a three-year period and expire ten years after the grant date.