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Derivative Financial Instruments (Details) bu in Millions	3 Months Ended
	Apr. 30, 2022 USD ($) bu	Apr. 30, 2021 USD ($)	Jan. 31, 2022 USD ($) bu
Derivative Financial Instruments (Details) [Line Items]
Debt Instrument, Collateral Amount	$ 4,920,000		$ 2,222,000
Gain (Loss) on Derivative Instruments, Net, Sales and Revenue	322,000	$ (1,126,000)
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 11,776,000	$ 1,894,000
Assets [Member] | Corn [Member]
Derivative Financial Instruments (Details) [Line Items]
Forward Purchase Contracts, Quantity (in US Bushels) | bu	20.3		19.2
Short/Sell [Member] | Liability [Member] | Corn [Member]
Derivative Financial Instruments (Details) [Line Items]
Commodity Futures, Quantity (in US Bushels) | bu	11.8		7.4

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Amount of assets pledged to secure a debt instrument.

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