Net Periodic Benefit Costs (Schedule Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 62	$ 44	$ 187	$ 133
Expected return on plan assets	(67)	(88)	(201)	(264)
Amortization of the net loss	27	24	81	71
Net periodic cost (benefit)	22	(20)	67	(60)
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	36	33	108	99
Interest cost	62	31	187	93
Amortization of prior service cost		8		24
Amortization of the net loss		44		132
Net periodic cost (benefit)	$ 98	$ 116	$ 295	$ 348