| In millions, except per share items | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | 634.4 | 515.1 | 383.7 | 235.0 | 255.3 | 137.8 | 12.9 | 0.4 |
| Revenue growth | 23.2% | 34.3% | 63.2% | -7.9% | 85.3% | 965.5% | 3395.9% | |
| Cost of goods sold [+] | 208.8 | 138.8 | 124.8 | 0.0 | 99.8 | 26.6 | 2.6 | 0.0 |
| Lease costs | | | | | 13.9 | 8.5 | 2.6 | |
| Natural gas midstream costs | | | | | 85.8 | 18.1 | 0.1 | |
| Gross profit | 425.6 | 376.4 | 258.8 | 235.0 | 155.6 | 111.2 | 10.3 | 0.4 |
| Gross margin | 67.1% | 73.1% | 67.5% | 100.0% | 60.9% | 80.7% | 79.6% | 95.7% |
| Selling, general and administrative [+] | 70.9 | 44.4 | 44.6 | 39.4 | 46.4 | 42.1 | 21.3 | 4.4 |
| General and administrative | 70.9 | 44.4 | 44.6 | 39.4 | 46.4 | 42.1 | 21.3 | 4.4 |
| Other operating expenses [+] | 314.3 | 239.8 | 201.8 | 202.4 | 152.7 | 64.0 | 5.5 | 4.3 |
| Exploration expenses | 58.9 | 49.6 | 50.2 | 52.8 | 116.2 | 21.2 | 3.0 | 4.7 |
| EBITDA [+] | | | | -6.8 | -43.5 | 5.0 | -16.5 | -8.4 |
| EBITDA growth | -56.2% | 638.0% | -284.0% | -84.4% | -962.5% | -130.5% | 96.9% | |
| EBITDA margin | 6.4% | 17.9% | 3.3% | -2.9% | -17.0% | 3.7% | -127.8% | -2268.1% |
| Depreciation and amortization | | | | 92.9 | 244.8 | 89.2 | 6.2 | 0.4 |
| EBIT [+] | 40.4 | 92.2 | 12.5 | -99.7 | -288.3 | -84.2 | -22.7 | -8.8 |
| EBIT growth | -56.2% | 638.0% | -112.5% | -65.4% | 242.4% | 271.0% | 158.0% | |
| EBIT margin | 6.4% | 17.9% | 3.3% | -42.4% | -112.9% | -61.1% | -175.4% | -2377.3% |
| Non-recurring items [+] | -0.5 | -1.8 | -0.2 | 17.7 | 691.3 | | | |
| Asset impairment | | | | 17.7 | 691.3 | | | |
| Loss (gain) on sale of assets | -0.5 | -1.8 | -0.2 | | | | | -0.4 |
| Interest expense, net [+] | 59.1 | 54.0 | 49.5 | 50.8 | 53.4 | 48.3 | 20.9 | 0.0 |
| Interest expense | 59.1 | 54.0 | 49.5 | 50.8 | 53.4 | 48.3 | 20.9 | |
| Interest income | | | | | | | | 0.0 |
| Other income (expense), net [+] | 48.6 | -21.2 | 45.3 | -38.0 | -3.0 | 21.1 | | |
| Gain (loss) on sale of assets | | | | 6.9 | -4.7 | -1.0 | | -0.4 |
| Gain (loss) on debt retirement | | | | 14.5 | -59.4 | | | |
| Gain (loss) on derivative instruments | 48.6 | -21.2 | 45.4 | -52.3 | 56.0 | 20.8 | | |
| Other | 0.0 | 0.0 | 0.0 | -0.1 | 0.4 | 0.4 | -20.9 | 0.0 |
| Pre-tax income | 30.4 | 18.8 | 8.5 | -206.2 | -1,036.0 | -111.4 | -43.5 | -8.8 |
| Income taxes | -1.3 | 0.0 | 0.0 | 0.5 | -74.2 | 71.8 | 0.0 | 0.0 |
| Tax rate | | 0.0% | 0.0% | | 7.2% | | 0.0% | 0.0% |
| Earnings from continuing ops | 29.1 | 18.8 | 8.5 | -206.7 | -961.8 | -183.2 | -43.5 | -8.8 |
| Earnings from discontinued ops | 1.3 | 0.0 | 0.0 | | | | | |
| Net income | 30.4 | 18.8 | 8.5 | -206.7 | -961.8 | -183.2 | -43.5 | -8.8 |
| Net margin | 4.8% | 3.7% | 2.2% | -88.0% | -376.7% | -132.9% | -336.6% | -2367.3% |
| |
| Basic EPS [+] | $0.88 | $0.94 | $0.49 | ($12.84) | ($4.41) | ($1.27) | ($0.58) | ($0.63) |
| Growth | -6.8% | 93.0% | -103.8% | 191.0% | 247.9% | 119.3% | -8.3% | |
| Diluted EPS [+] | $0.29 | $0.31 | $0.16 | ($12.84) | ($4.41) | ($1.27) | ($0.58) | ($0.63) |
| Growth | -6.8% | 93.9% | -101.3% | 191.0% | 247.9% | 119.3% | -8.3% | |
| |
| Dividends per share [+] | | | | | | | | $0.05 |
| Growth | | | | | | | -100.0% | |
| |
| Shares outstanding (basic) [+] | 33.2 | 20.0 | 17.5 | 16.1 | 217.9 | 144.4 | 75.3 | 13.9 |
| Growth | 66.1% | 14.4% | 8.6% | -92.6% | 50.9% | 91.8% | 442.2% | |
| Shares outstanding (diluted) [+] | 99.9 | 60.2 | 52.8 | 16.1 | 217.9 | 144.4 | 75.3 | 13.9 |
| Growth | 66.0% | 13.9% | 228.3% | -92.6% | 50.9% | 91.8% | 442.2% | |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |