| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 8-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Interest income: | | | | | | | | |
| Loans held-for-investment | 243.7 | 226.5 | 208.5 | 194.7 | 190.9 | 191.2 | 197.9 | 206.3 |
| Cash and cash equivalents | 6.1 | 3.8 | 2.4 | 1.0 | 0.4 | 0.3 | 0.3 | 0.4 |
| Total interest income | 249.8 | 230.3 | 210.9 | 195.7 | 191.3 | 191.5 | 198.3 | 206.7 |
| |
| Interest expense: | | | | | | | | |
| Repurchase facilities | 76.7 | 64.2 | 49.5 | 36.0 | 26.4 | 22.0 | 26.0 | 32.2 |
| Secured credit facility | 6.0 | 2.9 | | | | | | |
| Securitized debt obligations | 67.0 | 60.0 | 51.6 | 44.4 | 38.8 | 35.0 | 29.9 | 25.5 |
| |
| Convertible senior notes | | | | | | | | |
| Term financing facility | | | | | -4.5 | -6.8 | -7.6 | -6.2 |
| Asset-specific financings | 2.6 | 2.1 | 1.7 | 1.3 | 1.3 | 1.6 | 2.2 | 2.9 |
| Senior secured term loan facilities | | | | | 9.4 | 14.2 | | 16.6 |
| Total interest expense | | | | | 4.5 | 6.8 | 7.6 | 6.2 |
| Net interest income | 63.0 | 63.1 | | 62.4 | 66.2 | 67.0 | 71.3 | 72.7 |
| |
| Other (loss) income: | | | | | | | | |
| Provision for credit losses | -52.2 | -60.0 | | | -17.3 | -3.7 | | |
| Gain (loss) on extinguishment of debt | | -12.8 | | | -27.7 | -14.7 | -8.9 | |
| Fee income | | | | | 1.0 | 0.5 | | |
| Total other (loss) income | -87.0 | -107.8 | | -74.6 | -33.4 | -7.0 | 11.1 | 23.6 |
| |
| Expenses: | | | | | | | | |
| Compensation and benefits | 17.1 | 16.6 | | 21.9 | 22.6 | 21.8 | 21.5 | 16.1 |
| Servicing expenses | 5.5 | 5.6 | 5.7 | 5.7 | 5.7 | 5.3 | 5.2 | 4.8 |
| Other operating expenses | 7.5 | 7.5 | | 8.5 | 8.7 | 9.1 | 8.6 | -1.7 |
| Total expenses | 39.3 | 37.4 | 36.7 | 36.1 | 37.0 | 36.3 | 35.3 | 39.0 |
| Income (loss) before income taxes | -54.2 | -73.0 | | -26.9 | 17.2 | 45.2 | 68.5 | 84.6 |
| Provision for (benefit from) income taxes | 0.1 | 0.0 | 0.0 | 0.2 | 0.2 | 0.2 | 0.2 | 0.6 |
| Net income (loss) | -60.5 | -79.3 | -40.8 | -27.1 | 17.0 | 45.0 | 68.4 | 84.0 |
| Dividends on preferred stock | 14.5 | 14.5 | 14.5 | 11.6 | 8.0 | 4.4 | 0.8 | 0.1 |
| Net income (loss) attributable to common stockholders | -75.0 | -93.8 | -55.3 | -38.7 | 9.0 | 40.6 | 67.6 | 83.9 |
| Net income (loss) attributable to common stockholders - diluted | -75.0 | -93.8 | -55.3 | -38.7 | 9.0 | 40.6 | 67.6 | 83.9 |
| |
| Basic earnings (loss) per weighted average common share (in usd per share) | ($1.44) | ($1.79) | ($1.05) | ($0.73) | $0.17 | $0.75 | $1.24 | $1.53 |
| Diluted earnings (loss) per weighted average common share (in usd per share) | ($1.44) | ($1.79) | ($1.05) | ($0.68) | $0.21 | $0.77 | $1.20 | $1.44 |
| |
| Weighted average number of shares of common stock outstanding: | | | | | | | | |
| Basic (in shares) | 52.1 | 52.6 | 53.0 | 53.6 | 54.1 | 54.5 | 54.8 | 54.9 |
| Diluted (in shares) | 52.2 | 52.6 | 53.0 | 53.7 | 54.8 | 56.0 | 60.5 | 60.6 |
| Net income (loss) attributable to common stockholders | -75.0 | -93.8 | -55.3 | -38.7 | 9.0 | 40.6 | 67.6 | 83.9 |
| |
| Comprehensive income (loss) | | | | | | | | |
| Comprehensive income (loss) | -36.0 | -54.8 | | | -9.6 | 7.8 | 34.7 | |