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Loans to Bank Customers Nonperforming Loans (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Nonperforming Loans [Line Items]    
Loans to Bank Customers, Carrying Amount $ 7,228 $ 7,552
Nonperforming loans 309 387
Non-Classified [Member]
   
Nonperforming Loans [Line Items]    
Loans to Bank Customers, Carrying Amount 7,170 7,290
Real Estate Loans
   
Nonperforming Loans [Line Items]    
Nonperforming loans 29 8
Real Estate Loans | Non-Classified [Member]
   
Nonperforming Loans [Line Items]    
Loans to Bank Customers, Carrying Amount 1,056 3,360
Commercial Loans
   
Nonperforming Loans [Line Items]    
Nonperforming loans 93 244
Commercial Loans | Non-Classified [Member]
   
Nonperforming Loans [Line Items]    
Loans to Bank Customers, Carrying Amount 3,543 930
Installment Loans
   
Nonperforming Loans [Line Items]    
Nonperforming loans 187 135
Installment Loans | Non-Classified [Member]
   
Nonperforming Loans [Line Items]    
Loans to Bank Customers, Carrying Amount $ 2,571 $ 3,000