| 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 | 74.5 | 48.5 | -9.8 | 5.5 | 42.0 | 27.5 | 20.1 | 23.8 |
| Depreciation and amortization | 81.8 | 84.1 | 94.1 | 92.1 | 69.5 | 53.6 | 43.8 | 37.4 |
| Asset impairment charges | 2.3 | 4.4 | 36.6 | 25.6 | 0.8 | 1.0 | 0.1 | 0.1 |
| Stock-based compensation | 18.0 | 16.1 | 14.3 | 9.4 | 6.1 | 4.1 | 2.5 | 2.2 |
| Tax benefit from stock-based compensation | | | | | | | -0.7 | -2.1 |
| Deferred taxes | -14.9 | -4.6 | -11.3 | -12.4 | 2.1 | -1.3 | -1.0 | 3.5 |
| Change in working capital [+] | -58.7 | 5.0 | 48.9 | -43.0 | -28.6 | -23.7 | -11.7 | 2.2 |
| Accounts receivable | -15.1 | -8.6 | 10.4 | -17.9 | -27.5 | -12.8 | -6.8 | -5.9 |
| Inventories | -47.9 | -25.2 | 29.4 | -27.0 | -28.2 | -17.8 | -3.7 | -13.1 |
| Other current assets | -1.8 | -3.6 | -0.4 | -1.2 | -2.0 | -1.2 | 0.3 | -0.7 |
| Accounts payable | 12.7 | 6.1 | 0.3 | -2.3 | 15.7 | 0.4 | -6.8 | 14.8 |
| Accrued expenses | -16.4 | 36.5 | 4.6 | 4.7 | 12.6 | 6.5 | 3.2 | 5.9 |
| Deferred revenues | | | | | | | | -0.2 |
| Income taxes | 7.7 | 0.0 | 1.3 | -0.2 | 0.5 | -0.6 | 1.9 | 0.4 |
| Other | 2.2 | -0.1 | 3.3 | 1.0 | 0.2 | 1.9 | 0.2 | 1.0 |
| Other operating activities | 11.2 | -6.2 | -7.5 | 0.7 | -5.4 | 1.6 | 0.5 | 2.3 |
| Cash from operations | 114.3 | 147.2 | 165.3 | 77.8 | 86.5 | 62.7 | 53.6 | 69.5 |
| |
| Capital expenditures [+] | -45.0 | -27.9 | -46.0 | -78.2 | -63.3 | -38.6 | -32.8 | -51.0 |
| Purchases of property and equipment | -45.0 | -27.9 | -46.0 | -78.2 | -63.3 | -38.6 | -32.8 | -51.0 |
| Sales of property and equipment | 0.1 | 1.0 | 0.0 | 0.9 | 0.1 | 0.0 | 0.0 | 1.2 |
| Purchases of intangible assets | -3.2 | -2.8 | -3.3 | -3.3 | -3.0 | -2.6 | -2.2 | -2.0 |
| Acquisitions | -8.3 | -7.2 | -11.0 | -53.9 | -301.8 | -105.6 | -125.2 | -12.4 |
| Other cash from investing | -1.0 | -0.3 | 1.5 | | -10.8 | | 1.1 | 2.0 |
| Cash from investing | -57.4 | -37.2 | -58.7 | -134.5 | -378.8 | -146.8 | -159.1 | -62.0 |
| |
| Issuance of common stock, net | 20.1 | 21.3 | 6.6 | 6.3 | 215.0 | 143.8 | 5.3 | 6.7 |
| Option exercises | 19.0 | 20.2 | 5.5 | 4.8 | 8.5 | 5.6 | 0.7 | |
| Financing costs | | | | -1.5 | | -0.4 | -1.9 | |
| Other cash from financing | -61.4 | -99.5 | -96.9 | 30.6 | 121.8 | -42.2 | 114.5 | -16.9 |
| Cash from financing | -60.3 | -98.4 | -95.7 | 33.5 | 328.3 | 96.5 | 121.1 | -10.2 |
| |
| Free cash flow | 69.3 | 119.3 | 119.3 | -0.4 | 23.2 | 24.1 | 20.8 | 18.5 |
| Per share (diluted) | $1.20 | $2.08 | $2.15 | ($0.01) | $0.43 | $0.48 | $0.46 | $0.42 |
| |
| Cash paid for interest | 6.3 | 5.3 | 10.1 | 12.4 | 10.3 | 7.7 | 8.9 | 6.3 |
| Cash paid for income taxes | 17.1 | 8.8 | 8.9 | 12.1 | 8.7 | 6.0 | 2.3 | 3.4 |