Net Periodic Benefit Costs (Schedule Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 45	$ 40	$ 89	$ 81
Expected return on plan assets	(88)	(88)	(176)	(177)
Amortization of the net loss	23	24	47	48
Net periodic (benefit) cost	(20)	(24)	(40)	(48)
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	33	38	66	75
Interest cost	31	25	62	50
Amortization of prior service cost	8	8	16	16
Amortization of the net loss	44	71	88	142
Net periodic (benefit) cost	$ 116	$ 142	$ 232	$ 283