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Stock-Based Compensation (Detail) - (Table 1) - shares	9 Months Ended
	Sep. 30, 2015	May. 25, 2012	May. 22, 2009	May. 27, 2007	May. 26, 2006
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common stock authorized		23,466,000	13,716,000	5,231,250	4,050,000
Stock-based awards, including restricted stock and stock options granted, net of expired or cancelled	(19,151,000)
Common stock available for grant of stock-based awards as of June 30, 2012	4,315,000

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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).

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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)



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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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-Topic 505



-SubTopic 10



-Section 50



-Paragraph 2



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-Number 210



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