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Jurisdictions the Company Remains Subject to Tax Examinations (Detail) | 12 Months Ended
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Dec. 31, 2014
Earliest Tax Year | United States - Federal and State |
Income Taxes [Line Items] |
Tax Years | 2011
Earliest Tax Year | Ireland |
Income Taxes [Line Items] |
Tax Years | 2009
Earliest Tax Year | United Kingdom |
Income Taxes [Line Items] |
Tax Years | 2013
Latest Tax Year | United States - Federal and State |
Income Taxes [Line Items] |
Tax Years | 2014
Latest Tax Year | Ireland |
Income Taxes [Line Items] |
Tax Years | 2014
Latest Tax Year | United Kingdom |
Income Taxes [Line Items] |
Tax Years | 2014

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- Definition Tax year that remains open to examination under enacted tax laws, in CCYY format. + 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 (e) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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