Derivative Financial Instruments (Details) bu in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2022 USD ($) bu	Oct. 31, 2021 USD ($)	Oct. 31, 2022 USD ($) bu	Oct. 31, 2021 USD ($)	Jan. 31, 2022 USD ($) bu
Derivative Financial Instruments (Details) [Line Items]
Debt Instrument, Collateral Amount | $	$ 1,308,000		$ 1,308,000		$ 2,222,000
Gain (Loss) on Derivative Instruments, Net, Sales and Revenue | $	8,000	$ 2,144,000	1,144,000	$ 4,907,000
Gain (Loss) on Derivative Instruments, Net, Pretax | $	$ 9,000	$ 5,474,000	$ 12,920,000	$ 2,562,000
Liability [Member] | Corn [Member]
Derivative Financial Instruments (Details) [Line Items]
Forward Purchase Contracts, Quantity (in US Bushels)	5.3		5.3
Assets [Member] | Corn [Member]
Derivative Financial Instruments (Details) [Line Items]
Forward Purchase Contracts, Quantity (in US Bushels)	3.9		3.9		19.2
Short/Sell [Member] | Liability [Member] | Corn [Member]
Derivative Financial Instruments (Details) [Line Items]
Commodity Futures, Quantity (in US Bushels)	3.4		3.4		7.4
Long/Buy [Member] | Liability [Member] | Corn [Member]
Derivative Financial Instruments (Details) [Line Items]
Commodity Futures, Quantity (in US Bushels)	90,000.0		90,000.0