XML 153 R107.htm IDEA: XBRL DOCUMENT v2.4.0.8

Distribution of Depreciation and Amortization by Geographical Area (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	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

X

- Details

Name:	iclr_SegmentReportingDisclosureLineItems
Namespace Prefix:	iclr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_DepreciationAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration