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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Operating Loss Carryforwards [Line Items] |  |  |  |
Provision (benefit) for income taxes for continuing operations | $ 8,248,000 | $ 10,569,000 | $ 23,288,000 | $ 27,722,000
Effective income tax rate | 38.60% | 43.10% | 35.60% | 41.60%
Valuation allowance | $ 0 |  | $ 0 |
Tax Year 2014 [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Provision (benefit) for income taxes for continuing operations |  |  | $ 1,800,000 |

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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