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Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Level (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | $ 94,588 | $ 88,512 | $ 85,121
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 91,979 | 85,007 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash & Cash Equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 2,346 | 2,361 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 15,726 | 16,330 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Government Agency and Municipal Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Certificates of Deposit |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 2,534 | 2,263 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Taxable Bond |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 18,184 | 17,676 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Large Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 28,349 | 25,117 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mid Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 13,033 | 10,731 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Small Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 5,815 | 4,867 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | International Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 3,602 | 3,912 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Specialty Alternative Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 2,390 | 1,750 |
Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 2,609 | 3,505 |
Significant Other Observable Inputs (Level 2) | Cash & Cash Equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Corporate Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Government Agency and Municipal Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 1,302 | 2,462 |
Significant Other Observable Inputs (Level 2) | Certificates of Deposit |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 1,307 | 1,043 |
Significant Other Observable Inputs (Level 2) | Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Taxable Bond |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Large Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Mid Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Small Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | International Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Specialty Alternative Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Cash & Cash Equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Corporate Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Government Agency and Municipal Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Certificates of Deposit |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Taxable Bond |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Large Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Mid Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Small Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | International Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Specialty Alternative Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 0 | 0 |
Fair Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 94,588 | 88,512 |
Fair Value | Cash & Cash Equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 2,346 | 2,361 |
Fair Value | Corporate Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 15,726 | 16,330 |
Fair Value | Government Agency and Municipal Bonds and Notes |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 1,302 | 2,462 |
Fair Value | Certificates of Deposit |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 1,307 | 1,043 |
Fair Value | Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 2,534 | 2,263 |
Fair Value | Taxable Bond |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 18,184 | 17,676 |
Fair Value | Large Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 28,349 | 25,117 |
Fair Value | Mid Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 13,033 | 10,731 |
Fair Value | Small Cap Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 5,815 | 4,867 |
Fair Value | International Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | 3,602 | 3,912 |
Fair Value | Specialty Alternative Equity |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value of Plan Assets | $ 2,390 | $ 1,750 |

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