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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Income Tax Contingency [Line Items] |  |  |  |
Valuation allowance | $ 2,800 |  | $ 2,800 |
Income tax expense (benefit) | $ 20,978 | $ 16,249 | $ 36,925 | $ 29,504
Effective tax rate |  |  | 25.10% | 24.80%
Excess tax benefits from stock based awards |  |  | $ 1,200 | $ 1,100
Earliest Tax Year [Member] | Federal Tax Jurisdiction [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax years subject to examination |  |  | 2017 |
Latest Tax Year [Member] | Federal Tax Jurisdiction [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax years subject to examination |  |  | 2020 |

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- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP). + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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