Derivative Financial Instruments (Derivatives not Designated as Hedging Instruments, Effect in Statements of Income) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	$ 657	$ 1,621	$ 745	$ 3,979
Interest rate contracts with customers [Member] | Loan Related Derivative Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	(20,492)	(18,800)	(9,360)	(59,622)
Mirror interest rate contracts with counterparties [Member] | Loan Related Derivative Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	20,696	19,421	9,524	60,543
Risk participation agreements [Member] | Loan Related Derivative Income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	43	48	32	49
Interest rate lock commitments [Member] | Mortgage banking revenues
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	(72)	212	191	(722)
Forward sale commitments [Member] | Mortgage banking revenues
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Noninterest Income	$ 482	$ 740	$ 358	$ 3,731