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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Operating Loss Carryforwards [Line Items] |  |
Provision (benefit) for income taxes for continuing operations | $ 6,183,000 | $ 7,534,000
Effective income tax rate | 29.50% | 40.50%
Valuation allowance | $ 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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