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Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands | Nov. 30, 2021 | Feb. 28, 2021
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market securities | $ 705,326 | $ 685,585
Mutual fund investments | 25,650 | 24,049
Total assets at fair value | $ 745,213 | $ 714,196
Percent of total assets at fair value | 100.00% | 100.00%
Percent of total assets | 2.90% | 3.30%
Total liabilities at fair value | $ (4,561) | $ (6,024)
Percent of total liabilities | 0.00% | 0.00%
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market securities | $ 705,326 | $ 685,585
Mutual fund investments | 25,650 | 24,049
Total assets at fair value | $ 730,976 | $ 709,634
Percent of total assets at fair value | 98.10% | 99.40%
Percent of total assets | 2.90% | 3.30%
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 | $ 14,237 | $ 4,562
Percent of total assets at fair value | 1.90% | 0.60%
Percent of total assets | 0.10% | 0.00%
Total liabilities at fair value | $ (4,561) | $ (6,024)
Percent of total liabilities | 0.00% | 0.00%
Designated As Hedging Instrument |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative Asset | $ 10,566 | $ 4,061
Liabilities: Derivative instruments | (4,561) | (6,024)
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 | 10,566 | 4,061
Liabilities: Derivative instruments | (4,561) | (6,024)
Not Designated as Hedging Instrument [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative Asset | 3,671 | 501
Not Designated as Hedging Instrument [Member] | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative Asset | 0 | 0
Not Designated as Hedging Instrument [Member] | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative Asset | $ 3,671 | $ 501

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