Equity - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended
	Sep. 30, 2022	Jul. 31, 2022	Aug. 31, 2022	Aug. 31, 2021	May 31, 2022	May 31, 2021
Stockholder's Equity [Line Items]
Equity increase (decrease)			$ 105,000
Equity			2,246,935	$ 1,254,220	$ 2,141,969	$ 1,399,879
Patronage capital retirement			58,892	57,565
Net income (loss)			161,874	(90,332)
Cash Flow Hedging
Stockholder's Equity [Line Items]
Expected reclassification from AOCI over 12 months			1,000
Retained earnings allocation to patronage capital retirement
Stockholder's Equity [Line Items]
Equity			896,096	866,405	954,988	923,970
Patronage capital retirement			58,892	57,565
Retained earnings allocation to cooperative education fund
Stockholder's Equity [Line Items]
Equity			3,052	2,756	3,387	3,125
Retained earnings allocation to members' capital reserve
Stockholder's Equity [Line Items]
Equity			$ 1,062,286	$ 909,749	1,062,286	$ 909,749
Parent Company | Retained earnings allocation to patronage capital retirement
Stockholder's Equity [Line Items]
Net income (loss)		$ 89,000
Parent Company | Retained earnings allocation to cooperative education fund
Stockholder's Equity [Line Items]
Net income (loss)					$ 1,000
Parent Company | Retained earnings allocation to members' capital reserve
Stockholder's Equity [Line Items]
Net income (loss)		153,000
Parent Company | Retained earnings allocation of 50% of prior year patronage capital allocation
Stockholder's Equity [Line Items]
Net income (loss)		$ 44,000
Percentage of patronage capital allocation		50.00%
Parent Company | Retained earnings allocation held for twenty five years
Stockholder's Equity [Line Items]
Net income (loss)		$ 15,000
Period for which prior years allocated patronage capital is required to be held		25 years
Parent Company | Retained earnings, appropriated patronage capital allocated and retired
Stockholder's Equity [Line Items]
Net income (loss)		$ 59,000
Parent Company | Retained earnings, appropriated patronage capital allocated and retired | Subsequent Event
Stockholder's Equity [Line Items]
Patronage refunds	$ 59,000