Employee Benefit Plans (Summary Of Assets Segregated By Level Of Valuation Inputs Within The Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Total	$ 11,460	$ 14,704	$ 12,629
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	8,766	11,874
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total	2,694	2,830
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total	15	39
Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	15	39
Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Cash and Cash Equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Common stocks
Defined Benefit Plan Disclosure [Line Items]
Total	8,751	11,835
Common stocks | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	8,751	11,835
Common stocks | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Common stocks | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Corporate Bond Securities
Defined Benefit Plan Disclosure [Line Items]
Total	2,694	2,830
Corporate Bond Securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Corporate Bond Securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total	2,694	2,830
Corporate Bond Securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	$ 0	$ 0