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Employee Benefits (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined contribution employee automatic contribution, percent |  |  | 6.00% |
Administrative expense |  |  | $ 0 | $ 0
Award vesting period |  |  | 6 years |
Contributions, net of forfeitures, made to the defined contribution plan | $ 2,526,000 | $ 2,242,000 | $ 6,924,000 | 6,791,000
Profit sharing, percent of pre-tax profit paid to eligible employees on quarterly basis |  |  | 10.00% |
Profit sharing bonus plan expense | 2,358,000 | 3,000,000 | $ 7,409,000 | 8,691,000
Medical claim payments | 2,342,000 | 2,985,000 | 6,188,000 | 6,843,000
Health saving account contributions | $ 888,000 | $ 890,000 | $ 2,621,000 | $ 2,663,000
Each Year After Two Years of Service |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 20.00% |
Effective January 1, 2016 |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Percent of match |  |  | 175.00% |
Defined contribution employer, maximum match percent |  |  | 6.00% |

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- Definition Defined Contribution Employer Maximum Match Percent + References No definition available. + Details
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- Definition Profit Sharing, Percent of Pre-tax Profit Paid to Eligible Employees on Quarterly Basis + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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