Derivatives and Hedging Activity - Effect on Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivatives
Gain (Loss) Recognized in Income	$ (38,605)	$ 334,015	$ 82,363
Interest rate contracts
Derivatives
Gain (Loss) Recognized in Income	27,293	216,778	41,033
Interest rate swap guarantees
Derivatives
Gain (Loss) Recognized in Income	0	260	589
Foreign exchange contracts
Derivatives
Gain (Loss) Recognized in Income	(65,085)	116,443	41,228
Credit instruments
Derivatives
Gain (Loss) Recognized in Income	$ (813)	$ 534	$ (487)