Comprehensive Income (Components Of Accumulated OCI, Net Of Tax) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 376,456	$ 389,461	$ 413,812	$ 416,644	$ 408,122	$ 407,118	$ 413,812	$ 407,118
Current Period Change	(21,465)	(16,231)	(27,684)	(2,014)	3,207	(4,395)	(65,380)	(3,202)
Balance	359,447	376,456	389,461	419,883	416,644	408,122	359,447	419,883
Unrealized Holding Gains (Losses) On Available-For-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			1,955				1,955
Current Period Change							(66,592)
Balance	(64,637)						(64,637)
Unrealized Actuarial Loss On Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(3,056)				(3,056)
Balance	(3,056)						(3,056)
Unrealized Loss On Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(1,212)				(1,212)
Current Period Change							1,212
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(46,228)	(29,997)	(2,313)	2,382	(825)	3,570	(2,313)	3,570
Current Period Change	(21,465)	(16,231)	(27,684)	(2,014)	3,207	(4,395)	(65,380)
Balance	$ (67,693)	$ (46,228)	$ (29,997)	$ 368	$ 2,382	$ (825)	$ (67,693)	$ 368