Short-Term Debt (Summary Of Short-Term Borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Abstract]
Securities Sold under Agreements to Repurchase	$ 312,458	$ 295,956	$ 211,255
Federal Home Loan Bank advances (Avg Bal)		151	10,752
Securities sold under agreements to repurchase (Avg Bal)	298,413	253,289	200,697
Federal Funds purchased (Avg Bal)		16	3
Federal Home Loan Bank advances (Max Outstanding)		9,900	154,000
Securities sold under agreements to repurchase (Max Outstanding)	$ 330,577	$ 295,956	$ 226,603
Federal Home Loan Bank advances (weighted average interest rate)		0.85%	2.72%
Securities sold under agreements to repurchase (weighted average interest rate)	0.16%	0.39%	1.59%
Federal Funds purchased (weighted average interest rate)	1.46%	0.83%	2.84%
Federal Home Loan Bank advances (end of year interest rate)		0.41%	1.85%
Securities sold under agreements to repurchase (end of year interest rate)	0.16%	0.34%	1.51%