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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 |

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