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Financial Instruments and Risk Management - Carrying Value of Assets and Liabilities Recorded at Fair Value on Recurring Basis (Details) - Fair Value - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Liabilities: |  |
Liabilities | $ 15,069 | $ 15,135
Nonqualified employee savings plan |  |
Liabilities: |  |
Nonqualified employee savings plan | 15,069 | 15,135
Level 1 |  |
Liabilities: |  |
Liabilities | 15,069 | 15,135
Level 1 | Nonqualified employee savings plan |  |
Liabilities: |  |
Nonqualified employee savings plan | 15,069 | 15,135
Level 2 |  |
Liabilities: |  |
Liabilities | 0 | 0
Level 2 | Nonqualified employee savings plan |  |
Liabilities: |  |
Nonqualified employee savings plan | 0 | 0
Level 3 |  |
Liabilities: |  |
Liabilities | 0 | 0
Level 3 | Nonqualified employee savings plan |  |
Liabilities: |  |
Nonqualified employee savings plan | $ 0 | $ 0

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