Guarantees (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Dec. 31, 2021
Guarantor Obligations [Line Items]
Derivative Liabilities	[1]	$ 18,382	$ 12,101
Notional amount of underlying interest rate swaps associated with risk participation agreements		2,915,940	$ 2,916,181
Financial Standby Letter Of Credit [Member]
Guarantor Obligations [Line Items]
Standby letters of credit, net liability		4,200
Contractual amount of letters of credit, guaranteed maximum potential future payments		502,100
Risk Participation Agreement [Member] | Indirect Guarantee Of Indebtedness [Member]
Guarantor Obligations [Line Items]
Derivative Liabilities		126
Notional amount of underlying interest rate swaps associated with risk participation agreements		$ 347,900
Minimum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years		2 years
Maximum [Member] | Risk Participation Agreement [Member]
Guarantor Obligations [Line Items]
Term, in years		15 years

[1] * The fair value of each class of derivative is shown in Note 11.