| In millions, except per share items | Sep-30-20 | Jun-30-20 | Jun-05-20 | Mar-31-20 | Dec-31-19 | Sep-30-19 | Jun-30-19 | Jun-05-19 |
| | 10-Q | 10-Q | 8-K | 10-Q | 10-K | 10-Q | 10-Q | 8-K |
| Revenues: | | | | | | | | |
| Rental revenues | 218.5 | 212.3 | | 208.7 | 207.0 | 154.9 | 104.2 | |
| Total revenues | 218.5 | 212.3 | | 208.7 | 207.0 | 209.0 | 206.5 | |
| Total revenues growth | 4.5% | 2.8% | | 6.6% | 13.1% | 33.3% | 56.3% | |
| Expenses: | | | | | | | | |
| Residential property operating expenses | 77.3 | 78.1 | | 78.2 | 77.8 | 76.8 | 73.3 | |
| Property management expenses | 15.3 | 15.9 | | 15.9 | 15.4 | 15.3 | 14.5 | |
| Depreciation and amortization | 81.1 | 80.5 | | 80.2 | 82.2 | 83.9 | 85.3 | |
| Acquisition and integration costs | 0.9 | 0.3 | | 0.9 | | 3.1 | 28.1 | |
| Impairment | 2.4 | 2.8 | | 3.7 | 4.5 | 4.8 | 5.6 | |
| Mortgage loan servicing costs | | | | | 0.9 | 1.2 | 1.4 | |
| Interest expense | -57.2 | -79.9 | | -82.1 | -84.1 | -67.1 | -87.3 | |
| Share-based compensation | 14.6 | 5.4 | | 6.3 | 5.9 | 13.5 | 5.3 | |
| General and administrative | 29.8 | 28.7 | | 27.7 | 25.8 | 24.5 | 22.4 | |
| |
| Management fees to AAMC | | | | | | | | |
| Termination fee to AAMC | | | | | | | | |
| Total expenses | 387.5 | 344.8 | | 348.3 | 352.1 | 362.3 | 399.6 | |
| Operating loss | -129.2 | -92.5 | | -95.5 | -94.2 | -102.7 | -124.3 | |
| Operating margin | -59.1% | -43.6% | | -45.8% | -45.5% | -49.2% | -60.2% | |
| Insurance recoveries | 0.2 | 0.3 | | 0.3 | 0.7 | 0.9 | 1.0 | |
| Other (loss) income | 25.2 | 15.3 | | -10.8 | -10.8 | -9.9 | -0.7 | |
| Net loss before income taxes | -104.7 | -77.9 | | -106.9 | -105.2 | -89.0 | -125.6 | |
| Income tax expense | | -0.2 | | | -0.2 | | -0.1 | |
| Net loss | -104.9 | -78.1 | | -107.1 | -105.4 | -89.1 | -125.7 | |
| |
| Loss per share of common stock - basic: | | | | | | | | |
| Loss per basic share (usd per share) | ($1.85) | ($1.45) | | ($1.99) | ($1.97) | ($2.13) | ($2.34) | |
| |
| Weighted average common stock outstanding – basic (in shares) | 14,109.7 | 54.5 | | 53.8 | 53.7 | 13,469.0 | 53.6 | |
| |
| Loss per share of common stock - diluted: | | | | | | | | |
| Loss per diluted share (usd per share) | ($1.85) | ($1.45) | | ($1.99) | ($1.97) | ($2.13) | ($2.34) | |
| Weighted average common stock outstanding – diluted (in shares) | 14,240.8 | 54.6 | | 53.8 | 53.7 | 13,469.0 | 53.6 | |
| |
| Dividends declared per common share (usd per share) | | | | $0.45 | | $150.45 | $0.60 | |