v3.24.1.u1
Accumulated Other Comprehensive Loss (Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 29, 2024
Feb. 28, 2023
Feb. 28, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at beginning of year $ 97,869 $ (46,422) $ (118,691)
Other comprehensive income before reclassifications 143 162,669 57,245
Amounts reclassified from accumulated other comprehensive loss (38,733) (18,378) 15,024
Other comprehensive income (38,590) 144,291 72,269
Balance at end of year 59,279 97,869 (46,422)
Net Unrecognized Actuarial Losses      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at beginning of year (44,590) (73,001) (92,662)
Other comprehensive income before reclassifications 7,081 26,477 17,034
Amounts reclassified from accumulated other comprehensive loss 393 1,934 2,627
Other comprehensive income 7,474 28,411 19,661
Balance at end of year (37,116) (44,590) (73,001)
Net Unrecognized Hedge Gains (Losses)      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at beginning of year 142,459 26,579 (26,029)
Other comprehensive income before reclassifications (6,943) 136,192 40,211
Amounts reclassified from accumulated other comprehensive loss (39,121) (20,312) 12,397
Other comprehensive income (46,064) 115,880 52,608
Balance at end of year 96,395 142,459 26,579
AOCI Attributable to Parent [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income $ (38,590) $ 144,291 $ 72,269