| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues: |
| Electric Operations | 66.3 | | | | | | | |
| Corporate and Other | 2.3 | 1.3 | | | | | | |
| Coal Operations | 293.3 | 246.4 | | | | | | |
| Total revenues [+] | 362.0 | 247.7 | 244.2 | 323.5 | 293.6 | 271.6 | 281.5 | 340.1 |
| Net interest income | 8.3 | 8.5 | -13.0 | 16.0 | 12.1 | | | |
| Other | | | | | | | 4.0 | 2.2 |
| Other income | 6.4 | 3.8 | 2.2 | 6.0 | | | | |
| Revenue growth [+] | 46.2% | 1.4% | -24.5% | 10.2% | 8.1% | -3.5% | -17.2% | 41.0% |
| Corporate and Other | 83.5% | | | | | | | |
| Coal Operations | 19.1% | | | | | | | |
| Cost of goods sold | 266.6 | 198.8 | 186.0 | 247.9 | 215.4 | 190.2 | 192.8 | 237.9 |
| Gross profit | 95.4 | 48.8 | 58.3 | 75.6 | 78.2 | 81.5 | 88.7 | 102.2 |
| Gross margin | 26.3% | 19.7% | 23.9% | 23.4% | 26.6% | 30.0% | 31.5% | 30.1% |
| Selling, general and administrative [+] | 21.3 | 17.7 | 13.5 | 15.9 | 14.8 | 17.5 | 12.8 | 17.2 |
| Sales and marketing | 16.4 | 14.8 | 11.6 | 12.8 | 11.8 | | | |
| General and administrative | 4.9 | 2.9 | 1.9 | 3.1 | 3.0 | | | |
| Other selling, general and administrative | 16.4 | 14.8 | 11.6 | 12.8 | 11.8 | | | |
| Equity in earnings | 0.4 | 0.4 | 1.1 | | | | -1.4 | -1.6 |
| Other operating expenses [+] | -3.2 | -4.4 | 0.2 | -0.6 | -0.6 | -0.8 | -1.0 | -3.7 |
| Exploration expenses | 0.7 | 0.5 | 0.8 | 1.2 | 1.2 | | | |
| EBITDA [+] | 77.7 | 35.9 | 45.6 | 60.3 | 64.0 | 64.8 | 75.5 | 87.1 |
| EBITDA growth | 116.7% | -21.3% | -24.3% | -5.9% | -1.2% | -14.1% | -13.3% | 52.5% |
| EBITDA margin | 21.5% | 14.5% | 18.7% | 18.6% | 21.8% | 23.9% | 26.8% | 25.6% |
| Depreciation and amortization | 46.9 | 40.0 | 39.6 | 48.6 | 44.2 | 38.5 | 35.6 | 43.9 |
| EBIT [+] | 30.9 | -4.1 | 6.0 | 11.7 | 19.8 | 26.3 | 39.9 | 43.1 |
| EBIT growth | -854.5% | -168.8% | -49.0% | -41.1% | -24.6% | -34.1% | -7.5% | 55.0% |
| EBIT margin | 8.5% | -1.7% | 2.4% | 3.6% | 6.8% | 9.7% | 14.2% | 12.7% |
| Non-recurring items [+] | | 1.6 | 1.8 | 77.9 | | | 16.6 | |
| Asset impairment | | 1.6 | 1.8 | 77.9 | | | 16.6 | |
| Interest expense | 11.0 | 8.0 | 13.0 | 16.0 | 16.3 | 12.4 | 14.8 | 15.6 |
| Interest expense | 11.0 | 8.0 | 13.0 | 16.0 | 16.3 | 12.4 | 14.8 | 15.6 |
| Other income (expense), net [+] | | 10.0 | | | | | | |
| Amortization of financing costs and debt discount | 3.6 | 2.6 | 2.3 | 2.1 | 2.0 | | | |
| Gain (loss) on debt retirement | | 10.0 | | | | | | |
| Write-off of deferred debt issuance costs | | 10.0 | | | | | | |
| Pre-tax income | 19.9 | -3.7 | -8.9 | -82.2 | 3.5 | 13.9 | 8.5 | 27.6 |
| Income taxes | 1.8 | 0.0 | -2.7 | -22.3 | -4.1 | -19.2 | -4.0 | 7.4 |
| Tax rate | 8.8% | | 29.9% | 27.2% | | | | 27.0% |
| Net income | 18.1 | -3.8 | -6.2 | -59.9 | 7.6 | 33.1 | 12.5 | 20.1 |
| Net margin | 5.0% | -1.5% | -2.5% | -18.5% | 2.6% | 12.2% | 4.4% | 5.9% |
| |
| Basic EPS [+] | $0.57 | ($0.12) | ($0.20) | ($1.98) | $0.25 | $1.12 | $0.43 | $0.69 |
| Growth | -560.8% | -40.0% | -89.7% | -880.7% | -77.3% | 160.8% | -38.3% | 95.3% |
| Diluted EPS [+] | $0.54 | ($0.12) | ($0.20) | ($1.98) | $0.25 | $1.12 | $0.43 | $0.69 |
| Growth | -538.8% | -40.0% | -89.7% | -880.7% | -77.3% | 160.8% | -38.3% | 95.3% |
| |
| Dividends per share [+] | | | $0.04 | $0.16 | $0.16 | $0.16 | $0.16 | $0.17 |
| Growth | | -100.0% | -75.3% | -0.1% | -0.4% | 0.6% | -0.7% | -1.0% |
| |
| Shares outstanding (basic) [+] | 32.0 | 30.6 | 30.4 | 30.3 | 30.1 | 29.7 | 29.3 | 29.0 |
| Growth | 4.7% | 0.6% | 0.6% | 0.6% | 1.4% | 1.4% | 0.8% | 0.9% |
| Shares outstanding (diluted) [+] | 33.6 | 30.6 | 30.4 | 30.3 | 30.1 | 29.7 | 29.3 | 29.0 |
| Growth | 9.9% | 0.6% | 0.6% | 0.6% | 1.4% | 1.4% | 0.8% | 0.9% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |