Significant Customer Concentrations (Details) (Customer Concentration Risk [Member])	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012 Total Operating Revenues [Member] Walmart [Member]	Jun. 30, 2011 Total Operating Revenues [Member] Walmart [Member]	Jun. 30, 2012 Total Operating Revenues [Member] Walmart [Member]	Jun. 30, 2011 Total Operating Revenues [Member] Walmart [Member]	Jun. 30, 2012 Total Operating Revenues [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2011 Total Operating Revenues [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2012 Total Operating Revenues [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2011 Total Operating Revenues [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2012 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Walmart [Member]	Jun. 30, 2011 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Walmart [Member]	Jun. 30, 2012 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Walmart [Member]	Jun. 30, 2011 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Walmart [Member]	Jun. 30, 2012 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2011 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2012 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2011 Total Operating Revenues, Excluding Stock-Based Retailer Incentive Compensation [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Jun. 30, 2012 GPR Cards Activated (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2011 GPR Cards Activated (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2012 GPR Cards Activated (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2011 GPR Cards Activated (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2012 Sales of Cash Transfer Products (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2011 Sales of Cash Transfer Products (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2012 Sales of Cash Transfer Products (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2011 Sales of Cash Transfer Products (in units) [Member] Four Largest Retailers Distributors [Member]	Jun. 30, 2012 Settlement Assets [Member] Walmart [Member]	Mar. 31, 2011 Settlement Assets [Member] Walmart [Member]	Jun. 30, 2012 Settlement Assets [Member] Three Other Largest Retailer Distributors, as a Group [Member]	Mar. 31, 2011 Settlement Assets [Member] Three Other Largest Retailer Distributors, as a Group [Member]
Concentration Risk [Line Items]
Concentration risk, percentage																									35.00%	33.00%	38.00%	39.00%
Concentration risk, percentage	62.00%	60.00%	64.00%	59.00%	21.00%	14.00%	21.00%	17.00%	64.00%	62.00%	65.00%	61.00%	21.00%	14.00%	20.00%	16.00%	88.00%	79.00%	88.00%	74.00%	88.00%	90.00%	89.00%	90.00%