Deferred Costs (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 29, 2012	Feb. 28, 2011	Feb. 28, 2010
Summary of Changes in Carrying Amount of Corporations net deferred costs
Beginning balance	$ 275,246	$ 287,965	$ 303,007
Payments	134,247	83,919	84,345
Amortization	(102,993)	(98,181)	(102,750)
Currency translation	(283)	1,543	3,363
Ending balance	$ 306,217	$ 275,246	$ 287,965