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Income Taxes Changes in Balance of Deferred Tax Asset Valuation Allowance (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Deferred Tax Asset Valuation Allowance [Roll Forward] |  |  |
Beginning Balance | $ (30,768) | $ (33,757) | $ (49,562)
Additions | (61,122) | (1,895) | (4,359)
Deductions | 6,520 | 4,884 | 20,164
Ending Balance | $ (85,370) | $ (30,768) | $ (33,757)

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- Definition Deferred Tax Assets Valuation Allowance, Decrease + References No definition available. + Details
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- Definition Deferred Tax Assets Valuation Allowance, Increase + References No definition available. + Details
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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