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401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans - Compensation Expense (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Postemployment Benefits [Abstract] |  |  |
Compensation expense | $ 1.4 | $ 1.2 | $ 0.9
Total discretionary contribution | $ 0.9 | $ 0.9 | $ 0.3
Guaranteed annual return | 5.00% | 5.00% | 5.00%

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