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Derivatives, Derivatives Instruments Gain (Loss) in Income Statement (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue |  | $ (102,713) | $ 94,332 | $ 8,979
Gain (Loss) on Derivatives, Net |  | (9,921) | (73,011) | (19,378)
Total customer risk management programs [Member] |  |  |  |
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue |  | 36,522 | 45,716 | 20,432
Gain (Loss) on Derivatives, Net |  | 0 | 0 | 0
Interest rate contracts [Member] |  |  |  |
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue |  | 5,531 | 10,690 | 5,503
Gain (Loss) on Derivatives, Net |  | 0 | 0 | 0
Energy contracts [Member] |  |  |  |
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue |  | 30,715 | 34,435 | 14,190
Gain (Loss) on Derivatives, Net |  | 0 | 0 | 0
Agricultural contracts [Member] |  |  |  |
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue |  | 0 | 0 | 27
Gain (Loss) on Derivatives, Net |  | 0 | 0 | 0
Foreign exchange contracts [Member] |  |  |  |
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue |  | 276 | 591 | 712
Gain (Loss) on Derivatives, Net |  | 0 | 0 | 0
Trading [Member] |  |  |  |
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue | [1] | (139,235) | 48,616 | (11,453)
Gain (Loss) on Derivatives, Net | [1] | 0 | 0 | 0
Internal risk management programs [Member] |  |  |  |
Trading Activity, Gains and Losses, Net [Line Items] |  |  |  |
Brokerage and Trading Revenue |  | 0 | 0 | 0
Gain (Loss) on Derivatives, Net |  | $ (9,921) | $ (73,011) | $ (19,378)
[1] | Includes changes in fair value of to-be-announced U.S. agency residential mortgage-backed securities and other derivative instruments offered to mortgage banking customers to manage their market risk or held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and trading revenue in the Consolidated Statements of Earnings.

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
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- Definition Amount of gain (loss) resulting from the difference between the acquisition price and the selling price or fair value of trading assets and trading liabilities, conducted separately from customer trading activities. Includes, but is not limited to, changes in fair value of trading assets and trading liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4F Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481961/940-320-45-5 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 35 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481992/940-320-35-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(e)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
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