Derivative Financial Instruments - Company's derivative financial instruments included in OCI as follows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Loss in OCI on derivatives	$ (29,022)	$ (72,667)	$ (66,168)	$ (71,182)
Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness test)	0	0	0	0
Gain (loss) recognized in other income for foreign currency exchange contracts:	1,447	936	1,204	4,954
Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) gain reclassified from OCI into interest income (effective portion)	(13,723)	3,755	(34,557)	12,797
Interest Income | Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness test)	0	0	0	0
Interest Income | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Customer-related positions:	910	1,035	770	4,760
Interest Income | Risk participation agreements
Derivative Instruments, Gain (Loss) [Line Items]
Customer-related positions:	25	38	54	186
Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness test)	0	0	0	0
Other Income | Foreign currency exchange contracts - matched customer book
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other income for foreign currency exchange contracts:	9	(1)	29	(1)
Other Income | Foreign currency exchange contracts - foreign currency loan
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other income for foreign currency exchange contracts:	$ 503	$ (136)	$ 351	$ 9