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Distribution of Income from Operations, including Restructuring and Other Items, by Geographical Area (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |  |
Income from operations | $ 121,167 | $ 68,017 | $ 29,443
Ireland |  |  |
Segment Reporting Information [Line Items] |  |  |
Income from operations | 81,811 | 9,659 | (34,703)
Rest Of Europe |  |  |
Segment Reporting Information [Line Items] |  |  |
Income from operations | 2,831 | 29,240 | 32,175
United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Income from operations | 29,472 | 21,036 | 24,874
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Income from operations | $ 7,053 | $ 8,082 | $ 7,097

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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration