Loans to Bank Customers - Nonperforming Loans (Details) - USD ($) $ in Thousands |
Jun. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Nonperforming Loans [Line Items] | ||
| Nonperforming loans | $ 469 | $ 189 |
| Residential | ||
| Nonperforming Loans [Line Items] | ||
| Nonperforming loans | 291 | 54 |
| Commercial Loans | ||
| Nonperforming Loans [Line Items] | ||
| Nonperforming loans | 10 | 31 |
| Installment Loans | ||
| Nonperforming Loans [Line Items] | ||
| Nonperforming loans | $ 168 | $ 104 |