Derivatives, Derivatives Instruments Gain (Loss) in Income Statement (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Trading Activity, Gains and Losses, Net [Line Items]
Brokerage and Trading Revenue		$ 177,351	$ (102,713)	$ 94,332
Gain (Loss) on Derivatives, Net		(22,461)	(9,921)	(73,011)
Total customer risk management programs [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Brokerage and Trading Revenue		27,738	36,522	45,716
Gain (Loss) on Derivatives, Net		0	0	0
Interest rate contracts [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Brokerage and Trading Revenue		5,455	5,531	10,690
Gain (Loss) on Derivatives, Net		0	0	0
Energy contracts [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Brokerage and Trading Revenue		21,913	30,715	34,435
Gain (Loss) on Derivatives, Net		0	0	0
Foreign exchange contracts [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Brokerage and Trading Revenue		370	276	591
Gain (Loss) on Derivatives, Net		0	0	0
Trading [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Brokerage and Trading Revenue	[1]	149,613	(139,235)	48,616
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		$ (22,461)	$ (9,921)	$ (73,011)

[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.