Income Taxes (Schedule Of Income Tax Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 28, 2018
Income Tax Disclosure [Abstract]
Current, Federal	$ 225,858	$ 218,497	$ 276,597
Current, State	47,797	49,596	41,892
Current, Total	273,655	268,093	318,489
Deferred, Federal	146	3,601	81,486
Deferred, State	(1,248)	(1,301)	(479)
Deferred, Total	(1,102)	2,300	81,007
Income Tax Expense (Benefit), Total	$ 272,553	$ 270,393	$ 399,496