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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | Sep. 30, 2015 | Dec. 31, 2014
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Income Tax Disclosure [Abstract] |  |
Liability for uncertain tax positions totaled | $ 0.5 | $ 1.2

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- Definition The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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