Schedule of Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2013
Goodwill [Line Items]
Beginning Balance	$ 553,819
Sentri acquisition	5,490
Foreign currency translation	154
Ending Balance	559,463
Americas
Goodwill [Line Items]
Beginning Balance	302,768
Sentri acquisition	5,490
Foreign currency translation
Ending Balance	308,258
EMEA
Goodwill [Line Items]
Beginning Balance	101,882
Sentri acquisition
Foreign currency translation
Ending Balance	101,882
APAC
Goodwill [Line Items]
Beginning Balance	149,169
Sentri acquisition
Foreign currency translation	154
Ending Balance	$ 149,323

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

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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 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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