Changes in Carrying Amount of Goodwill, by Reporting Segment (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill gross	$ 1,572,720	$ 1,581,584
Accumulated impairment losses	(332,128)	(332,128)
Goodwill net	1,240,592	1,249,456
Goodwill related to acquisitions	10,648
Purchase accounting adjustment	(1,733)
Translation adjustment	(17,779)
Americas
Goodwill [Line Items]
Goodwill gross	1,089,200	1,086,707
Accumulated impairment losses	(332,128)	(332,128)
Goodwill net	757,072	754,579
Goodwill related to acquisitions	5,278
Purchase accounting adjustment	(1,733)
Translation adjustment	(1,052)
EMEA
Goodwill [Line Items]
Goodwill gross	349,868	353,282
Goodwill net	349,868	353,282
Goodwill related to acquisitions	5,370
Translation adjustment	(8,784)
Asia
Goodwill [Line Items]
Goodwill gross	133,652	141,595
Goodwill net	133,652	141,595
Translation adjustment	$ (7,943)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e961-128460

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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