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Description of Business, Basis of Presentation, and Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
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Nov. 30, 2012
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Nov. 30, 2011
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Nov. 30, 2012
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Nov. 30, 2011
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May 31, 2012
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| Description of business and significant accounting policies (Textual) | |||||
| Maximum individual workers' compensation claims liability | $ 1.0 | $ 1.0 | |||
| Workers' compensation insurance costs in current liabilities | 5.7 | 5.7 | 6.2 | ||
| Workers compensation insurance costs in long-term liabilities | 14.2 | 14.2 | 19.0 | ||
| Stock-based compensation costs recognized | $ 5.1 | $ 5.3 | $ 11.5 | $ 11.9 | |
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- Details
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- Definition
Maximum individual claims liability workers compensation insurance. No definition available.
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Used to reflect the noncurrent portion of the liabilities (due beyond one year; or beyond one operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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