Employee Benefit Plans (The Major Categories Of Plan Assets Measured At Fair Value On a Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Cash equivalents	$ 1,845	$ 3,122
Equity securities	30,685	34,697
Fixed income securities	49,571	34,472
Total Plan investments	87,827	75,188
Foreign Currencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash equivalents	16	28
Short Term Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash equivalents	1,829	3,094
Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities		11,931
Depository Receipts [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities		203
Commingled Pension Trust Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities	30,685	22,468
Fixed income securities	49,566	20,051
Total Plan investments	5,726	2,897
Preferred Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities		95
Collateralized Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		750
All Other Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	5	2,928
Government National Mortgage Association [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		144
Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		10,599
Level 1 Inputs [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash equivalents	16	28
Equity securities		12,229
Total Plan investments	16	12,257
Level 1 Inputs [Member] | Foreign Currencies [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash equivalents	16	28
Level 1 Inputs [Member] | Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities		11,931
Level 1 Inputs [Member] | Depository Receipts [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities		203
Level 1 Inputs [Member] | Preferred Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities		95
Level 2 Inputs [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash equivalents	1,829	3,094
Equity securities	30,685	22,468
Fixed income securities	49,571	34,472
Total Plan investments	87,811	60,034
Level 2 Inputs [Member] | Short Term Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash equivalents	1,829	3,094
Level 2 Inputs [Member] | Commingled Pension Trust Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Equity securities	30,685	22,468
Fixed income securities	49,566	20,051
Total Plan investments	5,726
Level 2 Inputs [Member] | Collateralized Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		750
Level 2 Inputs [Member] | All Other Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities	$ 5	2,928
Level 2 Inputs [Member] | Government National Mortgage Association [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		144
Level 2 Inputs [Member] | Government Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fixed income securities		10,599
Level 3 Inputs [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Plan investments		2,897
Level 3 Inputs [Member] | Commingled Pension Trust Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Plan investments		$ 2,897