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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Operating Loss Carryforwards [Line Items] |  |  |
Provision (benefit) for income taxes for continuing operations | $ 7,506,000 | $ 1,041,000 |
Effective income tax rate | 31.10% | 30.70% |
Valuation allowance | $ 4,400,000 |  | $ 4,400,000
Net deferred tax asset | 42,700,000 |  | 41,400,000
Net current tax liability | 3,600,000 |  |
Net current tax asset |  |  | $ 1,000,000.0
Change in uncertain tax positions | $ 0 |  |
CARES Act |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss carryback period | 5 years |  |

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