Reserve for Transaction Losses (Detail) (Reserve For Transaction Losses [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Reserve For Transaction Losses [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance as of December 31, 2013	$ 223
Additions to expense	6,717
Losses incurred, net of recoveries	(6,603)
Balance as of June 30, 2014	$ 337

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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