Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unrealized loss on investment securities:
Unrealized gain (loss) on investment securities, Before-Tax Amount	$ 13,890	$ (59,621)	$ (7,508)
Unrealized gain (loss) on investment securities, Income Tax (Provision) Benefit	(3,550)	15,433	1,951
Unrealized gain (loss) on investment securities, Net-of-Tax Amount	10,340	(44,188)	(5,557)
Reclassification from accumulated other comprehensive income for gain on sale of securities, Before-Tax Amount	(5,044)
Reclassification from accumulated other comprehensive income for gain on sale of securities, Income Tax (Provision) Benefit	1,311
Reclassification from accumulated other comprehensive income for gain on sale of securities, Net-of-Tax Amount	(3,733)
Net change, Before-Tax Amount	8,846
Net change, Income Tax (Provision) Benefit	(2,239)
Total	6,607	(44,188)	(5,557)
Defined benefit pension plan adjustments:
Net actuarial (loss) gain, Before-Tax Amount	430	481	404
Net actuarial gain (loss), Income Tax (Provision) Benefit	(110)	(122)	(102)
Net actuarial gain (loss), Net-of-Tax Amount	320	359	302
Amortization of prior service cost, Before-Tax Amount		31	31
Amortization of prior service cost, Income Tax (Provision) Benefit		(9)	(8)
Amortization of prior service cost, Net-of-Tax Amount		22	23
Amortization of actuarial loss, Before-Tax Amount	108	274	383
Amortization of actuarial loss, Income Tax (Provision) Benefit	(28)	(74)	(103)
Amortization of actuarial loss, Net-of-Tax Amount	80	200	280
Net change, Before-Tax Amount	538	786	818
Net change, Income Tax (Provision) Benefit	(138)	(205)	(213)
Total	400	581	605
Other comprehensive (loss) income, Before-Tax Amount	9,384	(58,835)	(6,690)
Other comprehensive (loss) income, Income Tax (Provision) Benefit	(2,377)	15,228	1,738
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	$ 7,007	$ (43,607)	$ (4,952)