| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Revenues |
| Interchange and card revenue | 1.8 | 5.0 | 5.3 | 5.3 | 6.6 | 6.5 | 6.5 | 6.8 |
| Account fees | 1.9 | 2.1 | 2.1 | 2.2 | 2.6 | 2.7 | 2.6 | 2.6 |
| Revenue recognized at a point in time | 11.6 | 14.3 | 18.7 | 21.8 | 23.9 | 24.2 | 21.7 | 21.3 |
| Servicing fees from partner bank | | | 10.2 | | 14.2 | | 11.8 | 10.6 |
| Other revenue | 0.2 | 0.3 | 0.9 | 0.7 | 0.1 | 1.1 | 0.4 | 1.1 |
| University fees | 1.4 | 1.3 | 1.4 | 1.4 | 1.6 | 1.6 | 1.5 | 1.3 |
| Revenue recognized over time | 1.3 | 1.4 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 | 1.1 |
| |
| Mix |
| Interchange and card revenue | 13.9% | 32.1% | 26.8% | 23.1% | 26.5% | 25.9% | 28.6% | 30.2% |
| Account fees | 14.7% | 13.5% | 10.6% | 9.6% | 10.2% | 10.7% | 11.2% | 11.7% |
| Revenue recognized at a point in time | 89.7% | 91.0% | 94.0% | 94.9% | 95.5% | 95.7% | 95.2% | 95.3% |
| Servicing fees from partner bank | | | 51.2% | | 56.7% | | 51.8% | 47.2% |
| Other revenue | 1.5% | 1.7% | 4.5% | 3.2% | 0.2% | 4.4% | 2.0% | 5.0% |
| University fees | 10.6% | 8.5% | 6.8% | 6.3% | 6.4% | 6.2% | 6.5% | 5.9% |
| Revenue recognized over time | 10.3% | 9.0% | 6.0% | 5.1% | 4.5% | 4.3% | 4.8% | 4.7% |
| |
| Growth |
| Interchange and card revenue | -66.1% | -23.1% | -18.4% | -21.3% | -19.4% | 12.7% | -11.5% | 11.3% |
| Account fees | -13.5% | -21.4% | -17.9% | -15.7% | -4.0% | -3.4% | -7.9% | -7.1% |
| Revenue recognized at a point in time | -46.7% | -40.9% | -14.1% | 2.4% | 3.3% | 52.4% | 25.7% | 47.9% |
| Servicing fees from partner bank | | | -14.0% | | 51.4% | | 103.4% | 110.6% |
| Other revenue | -73.2% | -75.9% | 102.5% | -33.4% | -97.9% | 628.6% | -55.8% | 802.4% |
| University fees | -5.0% | -15.1% | -7.9% | 8.6% | 21.1% | 21.1% | 9.3% | -4.6% |
| Revenue recognized over time | 15.4% | 29.9% | 8.0% | 9.6% | 7.0% | 3.7% | 5.3% | 5.8% |