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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2020
Income Tax Disclosure [Abstract] |
Summary of Provision for Income Taxes | The provision for income taxes is as follows (in thousands):
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 2,943 |  |  | $ | 8,806 |  |  | $ | 7,412 |
State |  |  | 396 |  |  |  | 1,381 |  |  |  | 408 |
|  |  | 3,339 |  |  |  | 10,187 |  |  |  | 7,820 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 4,156 |  |  |  | (774 | ) |  |  | (824 | )
State |  |  | 1,336 |  |  |  | 3,433 |  |  |  | (289 | )
|  |  | 5,492 |  |  |  | 2,659 |  |  |  | (1,113 | )
Total provision |  | $ | 8,831 |  |  | $ | 12,846 |  |  | $ | 6,707 |
Summary of Deferred Income Tax Assets and Liabilities | Deferred income tax assets and liabilities consist of the following components (in thousands):
|  | December 31, |
|  | 2020 |  |  | 2019 |
Deferred income tax assets: |  |  |  |  |  |  |  |
Workers' compensation claims liabilities |  | $ | 9,946 |  |  | $ | 12,151 |
Operating lease liability |  |  | 6,107 |  |  |  | 5,920 |
Deferred compensation |  |  | 2,235 |  |  |  | 1,988 |
Payroll tax deferral |  |  | 1,668 |  |  |  | — |
Other |  |  | 1,154 |  |  |  | 1,345 |
MCC accrual |  |  | 1,062 |  |  |  | 1,458 |
Equity based compensation |  |  | 555 |  |  |  | 913 |
State credit carryforward |  |  | 518 |  |  |  | 923 |
Customer incentives |  |  | 54 |  |  |  | 333 |
State loss carryforward |  |  | — |  |  |  | 33 |
|  |  | 23,299 |  |  |  | 25,064 |
Less: valuation allowance |  |  | 163 |  |  |  | 173 |
|  |  | 23,136 |  |  |  | 24,891 |
Deferred income tax liabilities: |  |  |  |  |  |  |  |
Tax amortization of goodwill |  |  | (10,375 | ) |  |  | (10,312 | )
Tax depreciation in excess of book depreciation |  |  | (7,187 | ) |  |  | (3,421 | )
Operating lease right-of-use |  |  | (5,766 | ) |  |  | (5,588 | )
Tax effect of unrealized gains, net |  |  | (2,871 | ) |  |  | (1,058 | )
Other |  |  | (1,455 | ) |  |  | (1,724 | )
|  |  | (27,654 | ) |  |  | (22,103 | )
Net deferred income taxes |  | $ | (4,518 | ) |  | $ | 2,788 |
Summary of Effective Tax Rate Differed from U.S. Statutory Federal Tax Rate | The effective tax rate differed from the U.S. statutory federal tax rate due to the following:
|  | Year Ended December 31, |  |
|  | 2020 |  |  |  | 2019 |  |  |  | 2018 |  |
Statutory federal tax rate |  |  | 21.0 |  | % |  |  | 21.0 |  | % |  |  | 21.0 |  | %
State taxes, net of federal benefit |  |  | 3.2 |  |  |  |  | 6.2 |  |  |  |  | 0.3 |  |
Adjustment for final positions on filed returns |  |  | 0.6 |  |  |  |  | (0.2 | ) |  |  |  | (1.1 | ) |
Nondeductible expenses and other, net |  |  | 0.7 |  |  |  |  | 1.3 |  |  |  |  | 1.2 |  |
Federal and state tax credits |  |  | (4.9 | ) |  |  |  | (7.5 | ) |  |  |  | (6.4 | ) |
Other, net |  |  | 0.1 |  |  |  |  | 0.2 |  |  |  |  | — |  |
|  |  | 20.7 |  | % |  |  | 21.0 |  | % |  |  | 15.0 |  | %

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