Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Aug. 31, 2023	May 31, 2023	Aug. 31, 2022	May 31, 2022	Aug. 31, 2023	Aug. 31, 2022
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		$ 97,869			$ 97,869
Other comprehensive loss before reclassifications					(669)
Amounts reclassified from accumulated other comprehensive income					(18,603)
Other comprehensive income (loss), net of taxes	$ 17,267	(36,539)	$ 26,107	$ 52,314	(19,272)	$ 78,421
Ending balance	78,597				78,597
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					196
Other comprehensive income (loss), net of taxes					196
Ending balance	(44,394)				(44,394)
Net Unrecognized Hedge Gains (Losses)
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		$ 142,459			142,459
Other comprehensive loss before reclassifications					(669)
Amounts reclassified from accumulated other comprehensive income					(18,799)
Other comprehensive income (loss), net of taxes					(19,468)
Ending balance	$ 122,991				$ 122,991