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Significant Customer Concentrations (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2016
USD ($)
customer
Mar. 31, 2015
USD ($)
Dec. 31, 2015
Concentration Risk [Line Items]      
Stock-based retailer incentive compensation | $ $ 0 $ 1,906  
Number of major retail distributors | customer 4    
Customer Concentration Risk [Member] | Total Operating Revenues [Member] | Walmart [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 36.00% 40.00%  
Customer Concentration Risk [Member] | Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] | Walmart [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 36.00% 40.00%  
Customer Concentration Risk [Member] | GPR Cards Activated (in units) [Member] | Four Largest Retailers Distributors [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 55.00% 61.00%  
Customer Concentration Risk [Member] | Sales of Cash Transfer Products (in units) [Member] | Four Largest Retailers Distributors [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 74.00% 81.00%  
Customer Concentration Risk [Member] | Settlement Assets [Member] | Walmart [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage (balance sheet disclosures) 29.00%   62.00%
Customer Concentration Risk [Member] | Settlement Assets [Member] | Three Other Largest Retailer Distributors, as a Group [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage (balance sheet disclosures) 5.00%   9.00%