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Employee Retirement Plan - 401(k) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Retirement Benefits [Abstract] |  |  |
Percentage of eligible compensation matched | 6.00% |  |
Company match percentage | 50.00% |  |
Total expense related to the Retirement Plan, including optional contributions | $ 2.1 | $ 2.0 | $ 1.8
Deferred compensation liability | 10.4 | 11.3 |
Expense recorded for deferred compensation plan | $ 1.1 | $ 1.9 | $ 1.2

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