Summary Of Significant Accounting Policies (Components Of Accumulated OCI, Net Of Tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 413,812	$ 407,118	$ 386,783
Other Comprehensive Income (Loss)	(62,454)	(5,883)	2,975
Balance	364,536	413,812	407,118
Unrealized Holding Gains (Losses) On Available-For-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	1,955
Other Comprehensive Income (Loss)	(58,010)
Balance	(56,055)	1,955
Unrealized Actuarial Loss On Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(3,056)
Other Comprehensive Income (Loss)	(5,656)
Balance	(8,712)	(3,056)
Unrealized Loss On Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,212)
Other Comprehensive Income (Loss)	1,212
Balance		(1,212)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,313)	3,570	595
Other Comprehensive Income (Loss)	(62,454)	(5,883)	2,975
Balance	$ (64,767)	$ (2,313)	$ 3,570