Organization and Description of Business - Additional Information (Detail)	Jun. 30, 2013 Country	Dec. 31, 2012 Country
Number of countries in which company provides services	30	30

Number of Countries in which Entity Has Provided Services

No definition available.

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