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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Operating Loss Carryforwards [Line Items] |  |  |  |
Provision (benefit) for income taxes for continuing operations | $ 8,857,000 | $ 9,619,000 | $ 15,040,000 | $ 17,153,000
Effective income tax rate | 38.50% | 40.80% | 34.20% | 40.70%
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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