Commitments, Contingencies And Guarantees (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Notional amount of underlying swaps	$ 5,194,716	$ 3,742,521
Financial Standby Letter of Credit [Member]
Carrying value of the guarantee obligations, liability	3,000
Commitments outstanding, maximum potential future payments	601,800
State Tax Credits [Member]
Purchases of state tax credits	112,100
Sales of state tax credits	54,000
Purchase Obligation, to be Paid, Year One	187,100
Purchase obligation, to be paid in years after year one	388,200
Risk Participation Agreement [Member]
Carrying value of the guarantee obligations, liability	194
Notional amount of underlying swaps	$ 475,500
Risk Participation Agreement [Member] | Minimum [Member]
Risk Participation Agreements, Term	1 year
Risk Participation Agreement [Member] | Maximum [Member]
Risk Participation Agreements, Term	15 years