Derivative Instruments And Hedging Activities (Schedule Of Effect Of Derivative Instruments On The Consolidated Statements Of Earnings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Aug. 31, 2012		Aug. 31, 2011		Aug. 31, 2012		Aug. 31, 2011
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Loss recognized in AOCL	$ (3,380)	[1]	$ (10,705)	[1]	$ (6,392)	[1]	$ (17,118)	[1]
Loss reclassified from AOCL into CAF Income	(3,293)	[1]	(975)	[1]	(6,528)	[1]	(2,095)	[1]
Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
Loss recognized in CAF Income	$ 0	[2]	$ (35)	[2]	$ (1)	[2]	$ (75)	[2]

[1] Represents the effective portion.

[2] Represents the loss on interest rate swaps, the net periodic settlements and accrued interest.