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Income Taxes (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2021
Income Taxes [Line Items] |  |  |  |  |
Income tax expense | $ 8,118 | $ 7,556 | $ 18,061 | $ 15,073 |
Effective tax rate | 27.00% | 27.50% | 27.20% | 27.40% |
Increase in effective tax rate |  |  | 0.10% |  |
Statutory Effective Tax Rate |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
U.S. federal statutory rate |  |  | 21.00% |  |
State income tax rate, net of federal benefit |  |  | 2.90% |  |
Forecast |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Effective tax rate |  |  |  |  | 27.10%

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