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Distribution of Total Assets by Geographical Area (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]    
Assets $ 1,442,460 $ 1,202,108
Ireland
   
Segment Reporting Information [Line Items]    
Assets 581,568 476,159
Rest Of Europe
   
Segment Reporting Information [Line Items]    
Assets 321,661 236,305
United States
   
Segment Reporting Information [Line Items]    
Assets 486,232 437,756
Other
   
Segment Reporting Information [Line Items]    
Assets $ 52,999 $ 51,888