Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
May 04, 2013	Apr. 28, 2012	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Commitments and Contingencies [Line Items]
Lease renewal period, minimum	5 years		5 years
Lease renewal period, maximum	7 years		7 years
Operating lease agreement extension term	10 years		10 years
Operating lease agreement expiration period	2023		2023
Rent expense	$ 9.5	$ 6.9	$ 32.8	$ 23.6	$ 16.9
Contingent rents	0.1	0.1	0.5	0.5	0.3
Key Employees [Member]
Commitments and Contingencies [Line Items]
Maximum additional payments upon employee separation	$ 4.1		$ 3.8

The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved.

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+ Details

- Definition

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

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+ Details