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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Income Tax Contingency [Line Items] |  |  |  |
Valuation allowance | $ 3,000 |  | $ 3,000 |
Income tax expense (benefit) | $ 14,435 | $ 13,790 | $ 43,938 | $ 33,520
Effective tax rate |  |  | 24.90% | 23.50%
Increase in effective tax rate due to decrease in domestic production activities deduction |  |  | 1.40% |
Excess tax benefits from stock based awards |  |  | $ 1,400 | $ 3,300
Earliest Tax Year [Member] | Federal Tax Jurisdiction [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax years subject to examination |  |  | 2016 |
Latest Tax Year [Member] | Federal Tax Jurisdiction [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Tax years subject to examination |  |  | 2019 |

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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 Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for qualified production activity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 + Details
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