Stock-Based Employee Compensation - 2009 Employee Stock Purchase Plan (Narrative) (Details) - Employee Stock - USD ($)	Sep. 13, 2012	Sep. 12, 2012	Jun. 18, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance under the amended plan (up to for 9.0 million) (in shares)	14,000,000.0	9,000,000.0	9,000,000.0
Limit of fair market value any one employee can purchase per year (in shares)			$ 25,000
Additional shares authorized for future issuance (in shares)	5,000,000.0

In order to maintain its qualified status under Section 423 of the Internal Revenue Code, the 2009 ESPP imposes certain restrictions, including the limitation that no employee is permitted to participate in the 2009 ESPP if the rights of such employee to purchase common stock of the Company under the 2009 ESPP and all similar purchase plans of the Company or its subsidiaries would accrue at a rate which exceeds $25,000 of the fair market value of such stock for each year

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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