Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Aug. 31, 2022	May 31, 2022	Aug. 31, 2021	May 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		$ (46,422)			$ (46,422)
Other comprehensive income before reclassifications					81,908
Amounts reclassified from accumulated other comprehensive income (loss)					(3,487)
Other comprehensive income (loss), net of taxes	$ 26,107	52,314	$ 3,411	$ 2,937	78,421	$ 6,348
Ending balance	31,999				31,999
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)					962
Other comprehensive income (loss), net of taxes					962
Ending balance	(72,039)				(72,039)
Net Unrecognized Hedge Gains (Losses)
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance		$ 26,579			26,579
Other comprehensive income before reclassifications					81,908
Amounts reclassified from accumulated other comprehensive income (loss)					(4,449)
Other comprehensive income (loss), net of taxes					77,459
Ending balance	$ 104,038				$ 104,038