Derivatives (Commodity Derivative Contracts Outstanding) (Details) gal in Thousands, bu in Thousands, T in Thousands	Dec. 31, 2022 bu	Dec. 31, 2022 gal	Dec. 31, 2022 T	Dec. 31, 2021 bu	Dec. 31, 2021 gal	Dec. 31, 2021 T
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	1,090,085	365,484	3,629	1,319,055	341,763	3,258
Non-exchange traded
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	761,493	223,482	3,048	961,715	208,539	2,905
Non-exchange traded | Corn
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	567,405	0	0	685,681	0	0
Non-exchange traded | Soybeans
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	56,608	0	0	77,592	0	0
Non-exchange traded | Wheat
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	102,716	0	0	109,547	0	0
Non-exchange traded | Oats
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	24,710	0	0	31,627	0	0
Non-exchange traded | Ethanol
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	0	178,935	0	0	192,447	0
Non-exchange traded | Soybean meal
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	0	0	570	0	0	544
Non-exchange traded | Dried distillers grain
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	0	0	449	0	0	507
Non-exchange traded | Other
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	10,054	44,547	2,029	57,268	16,092	1,854
Exchange traded
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	328,592	142,002	581	357,340	133,224	353
Exchange traded | Corn
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	170,280	0	0	226,215	0	0
Exchange traded | Soybeans
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	46,380	0	0	64,730	0	0
Exchange traded | Wheat
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	111,567	0	0	65,020	0	0
Exchange traded | Oats
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	365	0	0	1,300	0	0
Exchange traded | Ethanol
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	0	94,206	0	0	100,884	0
Exchange traded | Propane
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	0	47,208	0	0	31,542	0
Exchange traded | Other
Amounts of quantities outstanding included in commodity derivative contracts
Derivative, notional amount	0	588	581	75	798	353