Changes in Goodwill by Reporting Units (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Beginning Balance	$ 19,358us-gaap_Goodwill	$ 18,816us-gaap_Goodwill
Additions	1,372us-gaap_GoodwillAcquiredDuringPeriod
Foreign Currency Translation	(1,525)us-gaap_GoodwillTranslationAdjustments	542us-gaap_GoodwillTranslationAdjustments
Ending Balance	19,205us-gaap_Goodwill	19,358us-gaap_Goodwill
Americas Region
Goodwill [Line Items]
Beginning Balance	6,994		6,994
Additions	1,372
Ending Balance	8,366		6,994
Europe/Africa Region
Goodwill [Line Items]
Beginning Balance	12,364	11,822
Foreign Currency Translation	(1,525)	542
Ending Balance	$ 10,839	$ 12,364

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

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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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