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Employee Benefit Plans (Schedule of Changes in Fair Value of Plan Assets) (Details) - Pension Benefits [Member] - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets $ 50,903 $ 48,314 $ 46,784
Fixed Income Funds [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 16,645 16,670  
Large cap stock fund [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 16,238 16,033  
Small cap stock fund [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 4,877 4,558  
International fund [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 6,607 6,338  
Real Estate Funds [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 5,529 4,576  
Cash and Cash Equivalents [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 1,007 139  
Fair Value, Inputs, Level 1 [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 50,903 48,314  
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 16,645 16,670  
Fair Value, Inputs, Level 1 [Member] | Large cap stock fund [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 16,238 16,033  
Fair Value, Inputs, Level 1 [Member] | Small cap stock fund [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 4,877 4,558  
Fair Value, Inputs, Level 1 [Member] | International fund [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 6,607 6,338  
Fair Value, Inputs, Level 1 [Member] | Real Estate Funds [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets 5,529 4,576  
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Pension Plan Assets $ 1,007 $ 139