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Employment Benefits (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Employee Benefits [Abstract] |  |  |
Matching contributions | $ 5,500,000 | $ 5,700,000 | $ 6,400,000
Minimum [Member] |  |  |
Employee Benefits [Abstract] |  |  |
Employee contribution limit per calendar year | 20,500 |  |
Maximum [Member] |  |  |
Employee Benefits [Abstract] |  |  |
Employee contribution limit per calendar year | $ 27,000 |  |

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- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
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