| 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 [+] | 68.3 | 62.6 | 62.1 | 60.5 | 58.0 | 52.8 | 49.6 | 45.5 |
| Lease / rental | | | | | | | 49.1 | 45.1 |
| Revenue growth | 9.0% | 0.9% | 2.7% | 4.2% | 9.8% | 6.6% | 9.0% | 6.7% |
| Cost of goods sold [+] | 27.7 | 25.5 | 23.2 | 22.7 | 22.2 | 20.4 | 20.0 | 18.1 |
| Other cost of sales | 7.3 | 6.5 | 5.8 | 5.7 | 5.5 | 5.2 | 4.8 | 4.9 |
| Lease costs | | | | | | | 0.6 | 0.5 |
| Maintenance and operations costs | 11.3 | 10.1 | 8.8 | 9.2 | 9.2 | 8.4 | 8.3 | 7.0 |
| Real estate taxes and insurance | 9.1 | 8.9 | 8.6 | 7.8 | 7.5 | 6.8 | 6.3 | 5.6 |
| Gross profit | 40.5 | 37.2 | 38.9 | 37.8 | 35.8 | 32.4 | 29.6 | 27.4 |
| Gross margin | 59.4% | 59.3% | 62.6% | 62.5% | 61.7% | 61.3% | 59.7% | 60.3% |
| Selling, general and administrative [+] | 2.7 | 2.5 | 2.2 | 2.5 | 2.2 | 2.0 | 2.1 | 2.1 |
| General and administrative [+] | 2.7 | 2.5 | 2.2 | 2.5 | 2.2 | 2.0 | 2.1 | 2.1 |
| General and administrative expenses | 2.7 | 2.5 | 2.2 | 2.5 | 2.2 | 2.0 | 2.1 | 2.1 |
| Equity in earnings | 0.5 | -0.6 | 0.2 | 1.7 | 1.6 | 3.9 | 1.8 | 0.9 |
| Other operating expenses | 3.4 | 3.8 | 3.3 | 3.4 | 3.1 | 2.8 | 2.0 | 1.9 |
| EBITDA [+] | 35.0 | 30.3 | 33.5 | 33.6 | 32.1 | 31.5 | 27.2 | 24.3 |
| EBITDA growth | 15.2% | -9.5% | -0.3% | 4.7% | 1.9% | 15.7% | 12.0% | 15.1% |
| EBITDA margin | 51.2% | 48.4% | 54.0% | 55.6% | 55.4% | 59.7% | 54.9% | 53.5% |
| Depreciation and amortization | 16.4 | 16.7 | 18.4 | 14.7 | 15.6 | 13.5 | 12.2 | 10.6 |
| EBIT [+] | 18.6 | 13.7 | 15.1 | 19.0 | 16.6 | 18.1 | 15.0 | 13.8 |
| EBIT growth | 35.9% | -9.6% | -20.2% | 14.4% | -8.3% | 20.0% | 9.4% | 27.8% |
| EBIT margin | 27.2% | 21.8% | 24.4% | 31.3% | 28.5% | 34.2% | 30.4% | 30.2% |
| Interest expense, net [+] | 14.0 | 13.6 | 13.7 | 12.2 | 12.4 | 11.1 | 10.2 | 10.0 |
| Interest expense | 15.0 | 13.6 | 13.7 | 12.2 | 12.4 | 11.1 | 10.2 | 10.0 |
| Interest income | 1.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other income (expense), net [+] | -0.9 | -2.7 | 0.0 | -0.2 | 0.0 | 0.0 | 0.1 | |
| Other non-operating gains/losses | | | | -0.2 | | | | |
| Other | -0.9 | -2.7 | | 0.2 | | | | |
| Pre-tax income | 3.7 | -2.7 | 1.4 | 6.5 | 4.2 | 6.9 | 5.0 | 3.8 |
| Income taxes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Tax rate | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| Net income | 3.7 | -2.7 | 1.4 | 6.5 | 4.2 | 6.9 | 5.0 | 3.8 |
| Net margin | 5.5% | -4.3% | 2.3% | 10.8% | 7.2% | 13.1% | 10.0% | 8.3% |
| |
| Basic EPS [+] | $30.99 | ($22.19) | $11.70 | $53.48 | $33.52 | $55.78 | $39.62 | $29.86 |
| Growth | -239.7% | -289.6% | -78.1% | 59.6% | -39.9% | 40.8% | 32.7% | 275.0% |
| Diluted EPS [+] | $30.99 | ($22.19) | $11.70 | $53.48 | $33.52 | $55.78 | $39.62 | $29.86 |
| Growth | -239.7% | -289.6% | -78.1% | 59.6% | -39.9% | 40.8% | 32.7% | 275.0% |
| |
| Dividends per share [+] | $77.13 | $38.40 | $38.39 | $38.37 | $36.00 | $64.20 | $53.86 | $29.96 |
| Growth | 100.9% | 0.0% | 0.1% | 6.6% | -43.9% | 19.2% | 79.8% | 0.0% |
| |
| Shares outstanding (basic) [+] | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Growth | -1.3% | -0.1% | -0.5% | -1.6% | 0.0% | -0.4% | -1.1% | -1.8% |
| Shares outstanding (diluted) [+] | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Growth | -1.3% | -0.1% | -0.5% | -1.6% | 0.0% | -0.4% | -1.1% | -1.8% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |