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Jurisdictions the Company Remains Subject to Tax Examinations (Detail)	12 Months Ended
	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

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