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Retirement Benefit Plan (Details) - USD ($) $ in Millions | 12 Months Ended | 42 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020
Retirement Benefits [Abstract] |  |  |  |
Employer percentage match of employees contribution |  |  |  | 100.00%
Employer maximum contribution as a percentage of gross pay |  |  |  | 5.00%
Employer matching contributions for retirement plan (in dollars) | $ 5.6 | $ 6.8 | $ 6.5 |

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- References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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