| In millions, except per share items | Mar-31-18 | Dec-31-17 | Sep-30-17 | Jun-30-17 | Mar-31-17 | Dec-31-16 | Sep-30-16 | Jun-30-16 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Revenues: | | | | | | | | |
| Rental and related revenues | 63.4 | | | | 112.2 | | | |
| Tenant recoveries | 10.9 | 0.2 | 0.3 | 0.4 | 10.5 | 0.3 | 0.4 | 0.4 |
| Total revenues | 74.3 | 70.6 | 56.0 | 79.3 | 122.8 | 103.6 | 123.7 | 123.7 |
| Total revenues growth | -39.5% | -31.9% | -54.7% | -35.8% | 2.1% | -26.9% | -15.3% | |
| Costs and expenses: | | | | | | | | |
| Depreciation and amortization | 30.0 | 31.3 | 31.4 | 34.4 | 34.5 | 35.7 | 35.9 | 34.6 |
| Operating | 11.1 | 0.3 | 0.6 | 1.0 | 10.7 | 0.7 | 1.0 | 1.0 |
| General and administrative | 7.1 | 6.7 | 7.0 | 7.2 | 6.3 | 5.7 | 7.1 | 4.2 |
| Restructuring costs | 10.4 | 5.1 | 5.5 | 4.6 | 3.2 | | | |
| Interest | -36.0 | -35.8 | -35.1 | -35.4 | -34.2 | | | |
| Impairments | 2.9 | 53.7 | 9.9 | 382.0 | | 145.9 | 21.1 | |
| Total costs and expenses | 97.5 | 132.9 | 89.6 | 464.7 | 89.0 | 213.0 | 65.2 | 39.9 |
| |
| Other income: | | | | | | | | |
| Gain on sales of real estate | | | | -3.3 | 3.3 | 4.1 | | -6.5 |
| Other income, net | 3.0 | 2.4 | 0.3 | 0.1 | 0.0 | 0.0 | 0.2 | 0.0 |
| Total other income, net | 3.0 | 2.4 | 0.3 | 0.1 | 3.3 | 4.2 | 0.2 | 0.0 |
| (Loss) income before income taxes | -20.3 | | | | 37.1 | | | |
| Income tax expense | -0.2 | 3.4 | -0.8 | -0.2 | -0.3 | 35.5 | -5.2 | -0.2 |
| Tax rate | | | | | 0.8% | | | |
| Net (loss) income and comprehensive (loss) income | -20.4 | -60.7 | -34.1 | -385.5 | 36.8 | -104.7 | 53.5 | 83.6 |
| Noncontrolling interests' share in earnings | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | | | |
| Net (loss) income and comprehensive (loss) income attributable to the Company | -20.4 | -60.8 | -34.1 | -385.5 | 36.8 | -104.7 | 53.5 | 83.6 |
| Less: preferred share dividends | 0.0 | 0.0 | -0.1 | -0.1 | -0.1 | | | |
| Net (loss) income and comprehensive (loss) income attributable to common shareholders | -20.5 | -60.8 | -34.2 | -385.5 | 36.7 | -104.7 | 53.5 | 83.6 |
| |
| (Loss) earnings per common share, basic and diluted | ($0.22) | ($0.65) | ($0.36) | ($4.12) | $0.39 | ($1.12) | $0.57 | $0.89 |