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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Income Tax Disclosure [Abstract] |  |
Effective rate | 53.60% | 44.30%
Income tax expense | $ 7,942 | $ 9,600
Federal statutory rate | 35.00% | 35.00%
Income tax expense | $ 1,000 |
Pre-tax federal net operating losses | $ 3,671 |
Pre-tax federal net operating losses expiration date | 2024 |
Tax effected NOLs | $ 2,400 |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 + Details
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