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Employee Benefit Plans, Financial Instruments Recorded At Fair Value On A Recurring Basis By The Plan (Details) - Pension Benefits [Member] - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | $ 135,867 | $ 128,563 | $ 122,995
Recurring Basis [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 135,867 | 128,563 |
Recurring Basis [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 85,717 | 80,098 |
Recurring Basis [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 50,150 | 48,465 |
Recurring Basis [Member] | Cash and Cash Equivalents [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 3,298 | 3,461 |
Recurring Basis [Member] | Cash and Cash Equivalents [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 3,298 | 3,461 |
Recurring Basis [Member] | Cash and Cash Equivalents [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 0 | 0 |
Recurring Basis [Member] | Foreign Equity Mutual Funds [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 46,385 | 41,000 |
Recurring Basis [Member] | Foreign Equity Mutual Funds [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 46,385 | 41,000 |
Recurring Basis [Member] | Foreign Equity Mutual Funds [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 0 | 0 |
Recurring Basis [Member] | Equity Mutual Funds [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 36,034 | 35,637 |
Recurring Basis [Member] | Equity Mutual Funds [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 36,034 | 35,637 |
Recurring Basis [Member] | Equity Mutual Funds [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 0 | 0 |
Recurring Basis [Member] | US Government Bonds [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 33 | 47 |
Recurring Basis [Member] | US Government Bonds [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 0 | 0 |
Recurring Basis [Member] | US Government Bonds [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 33 | 47 |
Recurring Basis [Member] | Corporate Bonds [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 50,117 | 48,418 |
Recurring Basis [Member] | Corporate Bonds [Member] | Level 1 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | 0 | 0 |
Recurring Basis [Member] | Corporate Bonds [Member] | Level 2 [Member] |  |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |  |
Fair value of plan assets | $ 50,117 | $ 48,418 |

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