v3.26.1
Accumulated Other Comprehensive Loss (Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 29, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at beginning of year $ 3,080 $ 59,279 $ 97,869
before reclassifications (12,664) (16,814) 138
Amounts reclassified from accumulated other comprehensive loss (24,542) (39,385) (38,728)
Other comprehensive income (loss) (37,206) (56,199) (38,590)
Balance at end of year (34,126) 3,080 59,279
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent 53 0 0
Net Unrecognized Actuarial Losses      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at beginning of year (36,008) (37,116) (44,590)
before reclassifications (2,820) 771 7,081
Amounts reclassified from accumulated other comprehensive loss 304 337 393
Other comprehensive income (loss) (2,516) 1,108 7,474
Balance at end of year (38,524) (36,008) (37,116)
Net Unrecognized Hedge Gains (Losses)      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at beginning of year 39,088 96,395 142,459
before reclassifications (9,897) (17,585) (6,943)
Amounts reclassified from accumulated other comprehensive loss (24,846) (39,722) (39,121)
Other comprehensive income (loss) (34,743) (57,307) (46,064)
Balance at end of year 4,345 39,088 96,395
AOCI Attributable to Parent [Member]      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive income (loss) (37,206) (56,199) (38,590)
Net unrecognized beneficial interests gains (losses)      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Balance at beginning of year 0 0 0
before reclassifications 53 0 0
Amounts reclassified from accumulated other comprehensive loss 0 0 0
Other comprehensive income (loss)   0 0
Balance at end of year $ 53 $ 0 $ 0