Commitments, Contingencies And Guarantees (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Notional amount of underlying swaps	$ 4,593,942	$ 4,631,381
Financial Standby Letter of Credit [Member]
Carrying value of the guarantee obligations, liability	4,400
Commitments outstanding, maximum potential future payments	669,700
State Tax Credits [Member]
Purchases of state tax credits	179,400
Sales of state tax credits	178,600
Purchase Obligation, to be Paid, Year One	165,200
Purchase obligation, to be paid in years after year one	505,900
Risk Participation Agreement [Member]
Carrying value of the guarantee obligations, liability	77
Notional amount of underlying swaps	$ 283,300
Risk Participation Agreement [Member] | Minimum [Member]
Risk Participation Agreements, Term	1 year
Risk Participation Agreement [Member] | Maximum [Member]
Risk Participation Agreements, Term	15 years