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Provision for Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Income Tax [Line Items] |  |  |  |
Effective income tax rate | 173.00% | 19.00% | 112.00% | 21.00%
Provision (benefit) expense for income taxes | $ (6,423) | $ 936 | $ (6,469) | $ 4,009
Change in effective tax rate | 15.00% |  |  |
Maximum [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase in tax rate due to adjusting tax rates | 112.00% |  |  |
Minimum [Member] |  |  |  |
Income Tax [Line Items] |  |  |  |
Increase in tax rate due to adjusting tax rates | 10.00% |  |  |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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