This element represents nonvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid). Basic and dilutive earnings per share are generally disclosed for such shares using the two-class method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6519812

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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Earnings Per Share (Details Textuals) (USD $)	3 Months Ended						8 Months Ended	9 Months Ended
Earnings Per Share (Details Textuals) (USD $)	Aug. 31, 2011	May 31, 2011	Feb. 28, 2011	Aug. 31, 2010	May 31, 2010	Mar. 31, 2010	Aug. 31, 2010	Aug. 31, 2011	Aug. 26, 2011	Feb. 25, 2011
Earnings Per Share (Textuals) [Abstract]
Weighted average shares of participating securities	11,239,000			7,661,000			6,797,000	10,297,000
Dividends declared on participating securities	$ 934,000			$ 559,000			$ 1,621,000	$ 2,414,000
Redeemable convertible preferred stock outstanding				4,105,138
Secured revolving credit facility	$ 950,000,000							$ 950,000,000	$ 950,000,000	$ 1,000,000,000
Quarterly dividend declared	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075		$ 0.075