Accumulated Other Comprehensive Loss (Narrative) (Details) (USD $)			3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Aug. 31, 2012	Feb. 29, 2012	Aug. 31, 2012 Tax Provision Benefit Adjustment, Prior Year [Member]	Aug. 31, 2012 Tax Provision Benefit Adjustment, Prior Year [Member]	Aug. 31, 2012 Tax Provision Benefit Adjustment, Interim Period [Member]	Aug. 31, 2012 Tax Provision Benefit Adjustment, Interim Period [Member]
Deferred taxes	$ 32,300,000	$ 24,000,000
Deferred Tax Provision (Benefit) Adjustment			$ 8,518,000	$ 8,518,000	$ 1,270,000	$ 1,270,000