Employee Benefit Plans (Summary Of Assets Segregated By Level Of Valuation Inputs Within The Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Total	$ 14,704	$ 12,629	$ 11,884
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	11,874	10,247
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total	2,830	2,382
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total	39	146
Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	39	146
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
US Government Agencies Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Total		100
US Government Agencies Debt Securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total		0
US Government Agencies Debt Securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total		100
US Government Agencies Debt Securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total
Common stocks
Defined Benefit Plan Disclosure [Line Items]
Total	11,835	10,101
Common stocks | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	11,835	10,101
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	2,830	2,282
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	2,830	2,282
Corporate Bond Securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	$ 0	$ 0