Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	Oct. 29, 2011
Commitments and Contingencies
Outstanding letters of credit under the Company's revolving credit facility	$ 55.8

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant