Derivative Financial Instruments - Summary of Foreign Exchange Forward Contracts (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives designated as fair value hedges, Fair Value	$ (30)	$ (70)
Foreign Exchange Risk [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives designated as fair value hedges, Notional Amount	(28,835)
Derivatives designated as fair value hedges, Fair Value	$ (30)

Fair value as of the balance sheet date of all derivatives designated as foreign currency fair value hedging instruments.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Name:	us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant