Income Taxes (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Apr. 29, 2012
Unrecognized tax benefits
Tax benefits recognized during the year	$ 7,419
Interest income related to prior periods	404
Federal
Unrecognized tax benefits
Tax benefits recognized during the year	6,704
State
Unrecognized tax benefits
Tax benefits recognized during the year	$ 475

The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 48

-Paragraph 21

-Subparagraph a(4)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration