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Employee Benefit Plans - FV of Plan Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | $ 37,416 | $ 30,084 | $ 25,689
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 37,113 | 29,773 |
Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 303 | 311 |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 1,449 | 666 |
Cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 1,449 | 666 |
Cash equivalents | Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Cash equivalents | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 303 | 311 |
Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Corporate bonds | Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 303 | 311 |
Corporate bonds | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 1,774 | 1,473 |
Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 1,774 | 1,473 |
Equity securities | Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Equity securities | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 33,890 | 27,634 |
Mutual funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 33,890 | 27,634 |
Mutual funds | Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | 0 | 0 |
Mutual funds | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair Value | $ 0 | $ 0 |

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