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Commitments and Contingencies (Detail)
$ in Millions
Oct. 21, 2014
claim
Mar. 31, 2017
USD ($)
Dec. 20, 2016
USD ($)
Heidarpour v. Central Payment Co., LLC | CPAY      
Commitments and Contingencies      
Settlement fund     $ 6.5
TelexFree Matter | Propay      
Commitments and Contingencies      
Number of additional claims | claim 4    
Federal Trade Commission Complaint Matter      
Commitments and Contingencies      
Estimated liability recorded   $ 14.7  
Federal Trade Commission Complaint Matter | NetSpend Corporation      
Commitments and Contingencies      
Total amount of prepaid cards issued   40.0  
Amount accessed by customers against the prepaid cards   3.6  
Amount of fees on prepaid cards to be refunded   $ 13.0