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Distribution of Depreciation and Amortization by Geographical Area (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Segment Reporting Disclosure [Line Items] |  |  |  |
Depreciation and amortization | $ 11,520 | $ 10,830 | $ 22,976 | $ 21,632
Ireland |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |
Depreciation and amortization | 4,836 | 4,506 | 9,825 | 9,001
Rest Of Europe |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |
Depreciation and amortization | 1,688 | 1,759 | 3,422 | 3,739
U.S. |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |
Depreciation and amortization | 3,987 | 3,535 | 7,705 | 6,937
Rest of World |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |
Depreciation and amortization | $ 1,009 | $ 1,030 | $ 2,024 | $ 1,955

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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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