Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Aug. 31, 2025	Feb. 28, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 1,186,946	$ 842,691
Mutual fund investments	31,906	27,495
Total assets at fair value	$ 1,219,586	$ 882,575
Percent of total assets at fair value	100.00%	100.00%
Percent of total assets	4.50%	3.20%
Total liabilities at fair value	$ (11,899)	$ (8,728)
Percent of total liabilities	0.10%	0.00%
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 1,186,946	$ 842,691
Mutual fund investments	31,906	27,495
Total assets at fair value	$ 1,218,852	$ 870,186
Percent of total assets at fair value	99.90%	98.60%
Percent of total assets	4.50%	3.20%
Total liabilities at fair value	$ 0	$ 0
Percent of total liabilities	0.00%	0.00%
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 0	$ 0
Mutual fund investments	0	0
Total assets at fair value	$ 734	$ 12,389
Percent of total assets at fair value	0.10%	1.40%
Percent of total assets	0.00%	0.00%
Total liabilities at fair value	$ (11,899)	$ (8,728)
Percent of total liabilities	0.10%	0.00%
Designated As Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 734	$ 10,813
Liabilities: Derivative instruments	(11,899)	(8,728)
Designated As Hedging Instrument | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Liabilities: Derivative instruments	0	0
Designated As Hedging Instrument | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	734	10,813
Liabilities: Derivative instruments	$ (11,899)	(8,728)
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		1,576
Not Designated as Hedging Instrument [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		0
Not Designated as Hedging Instrument [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		$ 1,576