Organization and Description of Business - Additional Information (Detail)	Dec. 31, 2013 Country
Organization And Description Of Business [Line Items]
Number of countries in which company provides services	31

Number of Countries in which Entity Provide Money Remittance Services

No definition available.

Name:	xoom_NumberOfCountriesInWhichEntityProvideMoneyRemittanceServices
Namespace Prefix:	xoom_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant