Goodwill - Schedule of Goodwill Activity (Detail) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2015	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Beginning balance	$ 22,208
Net foreign currency translation	(1,148)
Ending balance	21,060
September 30, 2015 balance at cost		$ 21,914
Accumulated amortization		(854)
Ending balance	$ 21,060	$ 21,060

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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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