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Distribution of Depreciation and Amortization by Geographical Area (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 14,543	$ 14,366	$ 44,120	$ 42,535
Ireland
Segment Reporting Information [Line Items]
Depreciation and amortization	6,588	5,144	19,146	14,972
Rest Of Europe
Segment Reporting Information [Line Items]
Depreciation and amortization	1,730	2,003	5,265	6,217
United States
Segment Reporting Information [Line Items]
Depreciation and amortization	5,368	6,277	17,154	18,412
Rest of World
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 857	$ 942	$ 2,555	$ 2,934

X

- 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=56944662&loc=d3e3602-108585

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- Definition

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+ References

No definition available.

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