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Employee Benefits (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |
Defined contribution employee automatic contribution, percent | 6.00% |
Administrative expense | $ 0 | $ 0
Contributions made to the defined contribution plan | $ 2,450,000 | 1,360,000
Profit sharing, percent of pre-tax profit paid to eligible employees on quarterly basis | 10.00% |
Profit sharing bonus plan expense | $ 3,167,000 | 1,306,000
Medical claim payments | 1,875,000 | 1,520,000
Health saving account payments | $ 874,000 | $ 720,000
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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