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Share Repurchase (Details) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 26, 2012 Share Repurchase Program 2011 [Member]	Apr. 30, 2011 Share Repurchase Program 2011 [Member]	Sep. 26, 2012 Share Repurchase Program 2012 [Member]	May 18, 2012 Share Repurchase Program 2012 [Member]
Equity, Class of Treasury Stock [Line Items]
Additional number of shares approved under stock repurchase program (in shares)		6,000,000		6,000,000
Number of accumulated shares repurchased (in shares)	6,000,000		135,843
Value of shares repurchased	$ 24.0		$ 0.7
Remaining number of shares approved under stock repurchase program (in shares)			5,900,000

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Cost basis for treasury stock acquired for purposes other than retirement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655



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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section B

-Paragraph 7, 11A

-Chapter 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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Number of shares held for each class of treasury stock.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655



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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section B

-Paragraph 7, 11A

-Chapter 1

-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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