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Distribution of Depreciation and Amortization by Geographical Area (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Segment Reporting Disclosure [Line Items] |  |  |
Depreciation and amortization | $ 46,514 | $ 42,823 | $ 38,682
Ireland |  |  |
Segment Reporting Disclosure [Line Items] |  |  |
Depreciation and amortization | 19,826 | 17,885 | 15,192
Rest Of Europe |  |  |
Segment Reporting Disclosure [Line Items] |  |  |
Depreciation and amortization | 6,595 | 7,211 | 7,057
United States |  |  |
Segment Reporting Disclosure [Line Items] |  |  |
Depreciation and amortization | 16,233 | 13,865 | 12,427
Other |  |  |
Segment Reporting Disclosure [Line Items] |  |  |
Depreciation and amortization | $ 3,860 | $ 3,862 | $ 4,006

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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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