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Employee Benefit Plans (The Major Categories Of Plan Assets Measured At Fair Value On a Recurring Basis) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Cash equivalents $ 3,122 $ 5,361
Equity securities 34,697 41,824
Fixed income securities 34,472 33,522
Total Plan investments 75,188 83,348
Foreign Currencies [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Cash equivalents 28 726
Short Terms Investment Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Cash equivalents 3,094 4,635
Common Stock [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 11,931 14,523
Depository Receipts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 203 368
Commingled Pension Trust Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 22,468 26,613
Fixed income securities 20,051 19,524
Total Plan investments 2,897 2,641
Preferred Equity [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 95 320
Collateralized Mortgage Obligations [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities 750 585
All Other Corporate Bonds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities 2,928 3,068
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 10,117
Mortgage-Backed Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities   61
Federal National Mortgage Association [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities   167
Level 1 Inputs [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Cash equivalents 28 726
Equity securities 12,229 15,211
Total Plan investments 12,257 15,937
Level 1 Inputs [Member] | Foreign Currencies [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Cash equivalents 28 726
Level 1 Inputs [Member] | Common Stock [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 11,931 14,523
Level 1 Inputs [Member] | Depository Receipts [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 203 368
Level 1 Inputs [Member] | Preferred Equity [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 95 320
Level 2 Inputs [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Cash equivalents 3,094 4,635
Equity securities 22,468 26,613
Fixed income securities 34,472 33,522
Total Plan investments 60,034 64,770
Level 2 Inputs [Member] | Short Terms Investment Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Cash equivalents 3,094 4,635
Level 2 Inputs [Member] | Commingled Pension Trust Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Equity securities 22,468 26,613
Fixed income securities 20,051 19,524
Level 2 Inputs [Member] | Collateralized Mortgage Obligations [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities 750 585
Level 2 Inputs [Member] | All Other Corporate Bonds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities 2,928 3,068
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 10,117
Level 2 Inputs [Member] | Mortgage-Backed Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities   61
Level 2 Inputs [Member] | Federal National Mortgage Association [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fixed income securities   167
Level 3 Inputs [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total Plan investments 2,897 2,641
Level 3 Inputs [Member] | Commingled Pension Trust Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Total Plan investments $ 2,897 $ 2,641