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Benefit Plans (Components Of Net Pension Expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Feb. 28, 2019
Defined Benefit Plan Disclosure [Line Items]      
Total net pension (benefit) expense $ (945) $ (1,107) $ (207)
Total net actuarial (gain) loss (1) (33,913) 68,861 4,560
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Total net pension (benefit) expense (1,378) (1,595) (681)
Total net actuarial (gain) loss (1) (33,703) 67,385 4,478
Restoration Plan      
Defined Benefit Plan Disclosure [Line Items]      
Total net pension (benefit) expense 433 488 474
Total net actuarial (gain) loss (1) $ (210) $ 1,476 $ 82