| In millions, except per share items | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues: | | | | | |
| Revenues | 411.0 | 812.0 | 862.0 | 836.0 | 871.0 |
| Revenues growth | -49.4% | -5.8% | 3.1% | -4.0% | |
| Operating Expenses: | | | | | |
| Cost of goods and services | | | | | |
| Property tax, insurance and other | 59.0 | 73.0 | 69.0 | 56.0 | 63.0 |
| Management and royalty fees | 40.0 | 80.0 | 52.0 | | |
| Corporate general and administrative | 28.0 | 41.0 | 85.0 | 76.0 | 54.0 |
| Depreciation and amortization | 159.0 | 181.0 | 156.0 | 140.0 | 139.0 |
| Gain on sales of real estate | -71.0 | -32.0 | | -4.0 | |
| Impairment loss | 54.0 | 141.0 | 154.0 | 1.0 | 104.0 |
| Total Operating Expenses | 560.0 | 984.0 | 1,019.0 | 744.0 | 824.0 |
| Operating income (loss) | -149.0 | -172.0 | -157.0 | 92.0 | 47.0 |
| Operating margin | -36.3% | -21.2% | -18.2% | 11.0% | 5.4% |
| |
| Other Income (Expense): | | | | | |
| Interest expense | -43.0 | -69.0 | -64.0 | -49.0 | -48.0 |
| Other income, net | 5.0 | 33.0 | 15.0 | 1.0 | 2.0 |
| Total Other Expenses | -38.0 | -36.0 | -59.0 | -48.0 | -46.0 |
| Income (loss) before income taxes | -187.0 | -208.0 | -216.0 | 44.0 | 1.0 |
| Income tax benefit | 9.0 | -4.0 | -21.0 | 109.0 | 2.0 |
| Net income (loss) | -178.0 | -212.0 | -262.0 | 152.0 | -1.0 |
| |
| Weighted average common shares outstanding: | | | | | |
| Weighted average common shares outstanding - basic (in shares) | 56.6 | 57.1 | 0.0 | 58.0 | |
| Weighted average common shares outstanding - diluted (in shares) | 56.6 | 57.1 | 0.0 | 58.3 | |
| |
| Earnings (loss) per share: | | | | | |
| Basic earnings (loss) per share (in usd per share) | ($3.14) | ($3.71) | ($4.47) | $2.62 | ($0.02) |
| Diluted earnings (loss) per share (in usd per share) | ($3.14) | ($3.71) | ($4.47) | $2.60 | ($0.02) |