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Compensation Plans - Activity of Restricted Stock Units (Parenthetical) (Detail) (Restricted Stock Units [Member], USD $)	3 Months Ended
	Feb. 28, 2013
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value	$ 15.78
Dividend equivalents declared on restricted stock units	83,000

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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