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Significant Customer Concentrations Significant Customer Concentrations (Details) (Customer Concentration Risk [Member])
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3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Total Operating Revenues [Member] | Walmart [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration Risk, Percentage | 65.00% | 64.00% | 66.00% | 64.00% |
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Total Operating Revenues [Member] | Three Other Largest Retailer Distributors, as a Group [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration Risk, Percentage | 22.00% | 21.00% | 22.00% | 21.00% |
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Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] | Walmart [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration Risk, Percentage | 65.00% | 65.00% | 66.00% | 65.00% |
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Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] | Three Other Largest Retailer Distributors, as a Group [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration Risk, Percentage | 21.00% | 21.00% | 21.00% | 20.00% |
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GPR Cards Activated (in units) [Member] | Four Largest Retailers Distributors [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration Risk, Percentage | 85.00% | 88.00% | 84.00% | 88.00% |
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Sales of Cash Transfer Products (in units) [Member] | Four Largest Retailers Distributors [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration Risk, Percentage | 87.00% | 88.00% | 88.00% | 89.00% |
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Settlement Assets [Member] | Walmart [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration risk, percentage | 41.00% | 35.00% | 41.00% | 35.00% |
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Settlement Assets [Member] | Three Other Largest Retailer Distributors, as a Group [Member]
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| Concentration Risk [Line Items] | ||||
| Concentration risk, percentage | 50.00% | 38.00% | 50.00% | 38.00% |