Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Nov. 30, 2022	Aug. 31, 2022	May 31, 2022	Nov. 30, 2021	Aug. 31, 2021	May 31, 2021	Nov. 30, 2022	Nov. 30, 2021
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			$ (46,422)				$ (46,422)
Other comprehensive income before reclassifications							113,510
Amounts reclassified from accumulated other comprehensive income (loss)							(9,668)
Other comprehensive income (loss), net of taxes	$ 25,421	$ 26,107	52,314	$ 12,042	$ 3,411	$ 2,937	103,842	$ 18,390
Ending balance	57,420						57,420
Net Unrecognized Actuarial Losses
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			(73,001)				(73,001)
Other comprehensive income before reclassifications							0
Amounts reclassified from accumulated other comprehensive income (loss)							1,444
Other comprehensive income (loss), net of taxes							1,444
Ending balance	(71,557)						(71,557)
Net Unrecognized Hedge Gains (Losses)
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			$ 26,579				26,579
Other comprehensive income before reclassifications							113,510
Amounts reclassified from accumulated other comprehensive income (loss)							(11,112)
Other comprehensive income (loss), net of taxes							102,398
Ending balance	$ 128,977						$ 128,977