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Long-Term Stock Incentive Plan	9 Months Ended
Long-Term Stock Incentive Plan	Aug. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Long-Term Stock Incentive Plan	Long-Term Stock Incentive Plan In May 2015, the Company awarded and issued a total of 89,343 restricted shares of the Company’s Class A common shares to certain officers and managers under the Company’s Long-Term Stock Incentive Plan (the “2006 Plan”). The shares of restricted stock awarded in May 2015, vest at the rate of 50.0 percent on the third anniversary of the award date and the remaining 50.0 percent on the fifth anniversary of the award date. The weighted average grant date fair value of these restricted share awards was $36.36 per share. In accordance with ASC 718, “Compensation — Stock Compensation” the Company is recognizing stock-based compensation on these restricted shares awarded on the accelerated method over the requisite service period. In July 2015, the Company awarded and issued a total of 8,190 restricted shares of the Company’s Class A common shares to certain non-employee directors, under the 2006 Plan. The shares of restricted stock awarded in July 2015, vest at the rate of 100.0 percent on the one year anniversary of the award date. The weighted average grant date fair value of these restricted share awards was $$36.67 per share. In accordance with ASC 718, “Compensation — Stock Compensation” the Company is recognizing stock-based compensation on these restricted shares awarded on the straight-line method over the requisite service period.