Comprehensive Income (Narrative) (Details) (USD $)	9 Months Ended		12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Feb. 28, 2013
Comprehensive Income [Abstract]
Tax benefit adjustment related to prior years		$ (8,518,000)
Deferred tax	$ 34,200,000		$ 35,900,000