Derivative Financial Instruments - Additional Information (Detail)	9 Months Ended
Sep. 30, 2014
Derivative [Line Items]
Foreign currency exchange contracts reclassified date	2015-06
Foreign Exchange Risk Management [Member]
Derivative [Line Items]
Foreign exchange forward contracts maturity	1 year
Hedging Effectiveness	100.00%

High end period remaining until maturity for the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DerivativeHigherRemainingMaturityRange1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration