| 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 |
| Net income | -8.1 | -0.8 | -19.0 | 4.3 | 10.7 | 7.6 | -5.3 | -20.7 |
| Depreciation and amortization | 19.4 | 19.3 | 19.4 | 19.1 | 18.9 | 18.8 | 18.5 | 18.6 |
| Asset impairment charges | | | | | | | | 20.3 |
| Stock-based compensation | | | | 1.4 | 1.4 | 1.6 | 1.4 | 1.9 |
| Deferred taxes | | | | -0.5 | 1.9 | -7.6 | -3.5 | -12.1 |
| Change in working capital [+] | -1.5 | 2.5 | -1.7 | -22.8 | -19.1 | -18.4 | -3.1 | 11.3 |
| Accounts receivable | | | | -3.0 | -7.6 | -5.6 | -1.8 | 11.4 |
| Inventories | | | | -15.0 | -20.4 | -27.4 | -9.2 | 15.9 |
| Accounts payable | | | | -1.4 | 5.3 | 14.2 | 7.1 | -13.0 |
| Income taxes | 0.0 | 0.0 | 0.2 | 0.1 | -0.2 | 0.1 | 0.2 | -0.2 |
| Other | -1.5 | 2.5 | -2.0 | -3.5 | 3.9 | 0.3 | 0.5 | -2.8 |
| Other operating activities | -18.7 | -39.0 | 25.1 | -5.9 | 2.8 | -0.9 | 0.4 | -0.1 |
| Cash from operations | -8.9 | -18.0 | 23.8 | -4.4 | 16.6 | 1.1 | 8.4 | 19.2 |
| |
| Capital expenditures [+] | 12.1 | 11.1 | 9.2 | -17.4 | -15.4 | -8.0 | -4.4 | -9.6 |
| Purchases of property and equipment | 12.1 | 11.1 | 9.2 | -17.4 | -15.4 | -8.0 | -4.4 | -9.6 |
| Sales of property and equipment | | | | | 0.0 | 0.1 | 1.6 | |
| Other cash from investing | -24.2 | -22.2 | -18.3 | | | | | 0.2 |
| Cash from investing | -12.1 | -11.1 | -9.2 | -17.4 | -15.4 | -7.9 | -2.8 | -9.3 |
| |
| Issuance of common stock, net | | | | | | | | 0.5 |
| Option exercises | 0.1 | 0.2 | 0.2 | 0.5 | 0.9 | 0.6 | 0.7 | |
| Financing costs | | | | | -1.1 | | -0.8 | -0.6 |
| Other cash from financing | 23.1 | 29.2 | -14.5 | 18.3 | 2.4 | 7.5 | -5.7 | -10.9 |
| Cash from financing | 22.9 | 29.0 | -14.7 | 17.8 | 2.7 | 7.0 | -5.6 | -9.9 |
| |
| Free cash flow | 3.2 | -6.9 | 33.0 | -21.8 | 1.2 | -6.9 | 4.0 | 9.6 |
| Per share (diluted) | $0.35 | ($0.77) | $3.74 | ($2.45) | $0.15 | ($0.93) | $0.56 | $1.36 |
| |
| Cash paid for interest | 4.0 | 2.0 | 2.9 | 3.7 | 4.2 | 4.0 | 3.5 | 2.4 |
| Cash paid for income taxes | | | | | 0.1 | | | |