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Summary of Significant Accounting Policies (Income Taxes) - Additional Information (Detail) | 3 Months Ended
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Mar. 31, 2016 USD ($)
Income Tax Contingency [Line Items] |
Total amount of unrecognized tax benefits relating to uncertain tax positions | $ 57,400,000
Amount of unrecognized tax benefits change from year end relating to uncertain tax positions | 2,900,000
Unrecognized tax benefits, increase resulting from current period tax positions | 1,000,000
Unrecognized tax benefits, increase due to tax positions taken in prior period | 1,900,000
Maximum [Member] |
Income Tax Contingency [Line Items] |
Reasonably possible reduction to the balance of unrecognized tax benefits in succeeding 12 months | $ 27,500,000
Tax Year 2010 [Member] |
Income Tax Contingency [Line Items] |
Income Tax Examination, Year under Examination | 2010
Tax Year 2011 [Member] |
Income Tax Contingency [Line Items] |
Income Tax Examination, Year under Examination | 2011
Tax Year 2012 [Member] |
Income Tax Contingency [Line Items] |
Income Tax Examination, Year under Examination | 2012

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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