Derivatives and Hedging Activity - Effect on Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivatives
Gain (Loss) Recognized in Income	$ 94,883	$ 206,070	$ 118,431	$ 461,921
Interest rate contracts
Derivatives
Gain (Loss) Recognized in Income	46,255	78,508	99,788	218,698
Interest rate swap guarantees
Derivatives
Gain (Loss) Recognized in Income	0	0	0	260
Foreign exchange contracts
Derivatives
Gain (Loss) Recognized in Income	48,549	127,358	18,412	242,042
Credit instruments
Derivatives
Gain (Loss) Recognized in Income	$ 79	$ 204	$ 231	$ 921