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Distribution of Capital Expenditure by Geographical Area (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]      
Capital Expenditures $ 29,488 $ 33,026 $ 36,005
Ireland
      
Property, Plant and Equipment [Line Items]      
Capital Expenditures 3,976 12,406 16,987
Rest Of Europe
      
Property, Plant and Equipment [Line Items]      
Capital Expenditures 1,887 2,506 4,795
United States
      
Property, Plant and Equipment [Line Items]      
Capital Expenditures 20,842 13,389 10,222
Other
      
Property, Plant and Equipment [Line Items]      
Capital Expenditures $ 2,783 $ 4,725 $ 4,001