Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Nov. 30, 2023	Aug. 31, 2023	May 31, 2023	Nov. 30, 2022	Aug. 31, 2022	May 31, 2022	Nov. 30, 2023	Nov. 30, 2022
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			$ 97,869				$ 97,869
Other comprehensive loss before reclassifications							(8,623)
Amounts reclassified from accumulated other comprehensive income							(28,579)
Other comprehensive income (loss), net of taxes	$ (17,930)	$ 17,267	(36,539)	$ 25,421	$ 26,107	$ 52,314	(37,202)	$ 103,842
Ending balance	60,667						60,667
Net Unrecognized Actuarial Losses
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			(44,590)				(44,590)
Other comprehensive loss before reclassifications							0
Amounts reclassified from accumulated other comprehensive income							294
Other comprehensive income (loss), net of taxes							294
Ending balance	(44,296)						(44,296)
Net Unrecognized Hedge Gains (Losses)
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			$ 142,459				142,459
Other comprehensive loss before reclassifications							(8,623)
Amounts reclassified from accumulated other comprehensive income							(28,873)
Other comprehensive income (loss), net of taxes							(37,496)
Ending balance	$ 104,963						$ 104,963