Derivatives and Hedging Activity - Effect on Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivatives
Gain (loss) on derivative financial instruments, net	$ 82,363	$ (82,178)	$ (6,310)
Interest rate contracts
Derivatives
Gain (loss) on derivative financial instruments, net	41,033	(48,692)	(10,516)
Interest rate swap guarantees
Derivatives
Gain (loss) on derivative financial instruments, net	589	(235)	(3,350)
Foreign exchange contracts
Derivatives
Gain (loss) on derivative financial instruments, net	41,228	(32,561)	8,801
Credit index instruments
Derivatives
Gain (loss) on derivative financial instruments, net	$ (487)	$ (690)	$ (1,245)