Earnings Per Share - Additional Information (Detail)	3 Months Ended	1 Months Ended
Nov. 30, 2012	Nov. 30, 2011	Mar. 31, 2012 2% Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities-equity based compensation plans (excluded from earnings per share calculation)	789,000	3,856,000
Number of shares issued due to calling of convertible notes			5,951,440

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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

-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6510752

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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-Name Accounting Standards Codification

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+ Details