| 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 | 101.9 | 80.2 | 57.8 | 63.1 | 73.5 | 44.3 | 40.0 | 43.2 |
| Depreciation and amortization [+] | 39.0 | 35.9 | 34.0 | 20.6 | 16.4 | 14.9 | 14.4 | 14.5 |
| Depreciation | 23.7 | 21.2 | 19.3 | 14.9 | 12.9 | 11.6 | 11.3 | 11.4 |
| Amortization of intangible assets | 15.3 | 14.6 | 14.7 | 5.7 | 3.5 | 3.3 | 3.1 | 3.1 |
| Stock-based compensation | 5.6 | 6.0 | 4.1 | 3.3 | 2.5 | 1.9 | 1.4 | 1.1 |
| Deferred taxes | -2.3 | -1.2 | -0.9 | 3.4 | 2.1 | 1.3 | 2.6 | 2.8 |
| Change in working capital [+] | -129.0 | -78.4 | 74.5 | 9.9 | -65.7 | 5.8 | 12.0 | -1.4 |
| Accounts receivable | -85.1 | -27.6 | 28.1 | 11.4 | -27.0 | -23.1 | 3.9 | -9.7 |
| Inventories | -37.7 | -78.5 | 38.3 | 0.4 | -26.0 | 0.1 | 12.3 | 9.8 |
| Other current assets | -6.1 | -7.0 | 6.4 | -4.6 | -0.6 | 2.8 | -5.6 | -3.5 |
| Income taxes | 2.9 | 4.6 | 6.6 | -4.9 | -10.3 | 2.4 | 4.6 | 4.5 |
| Other | -3.0 | 30.0 | -4.8 | 7.5 | -1.8 | 23.6 | -3.3 | -2.5 |
| Other operating activities | -0.5 | 7.1 | 14.8 | -11.4 | -15.8 | 2.5 | 5.4 | -7.8 |
| Cash from operations | 14.5 | 49.7 | 184.3 | 88.8 | 12.9 | 70.8 | 75.8 | 52.4 |
| |
| Capital expenditures [+] | -31.1 | -25.3 | -17.9 | -31.3 | -26.6 | -13.5 | -9.7 | -15.5 |
| Purchases of property and equipment | -31.1 | -25.3 | -17.9 | -31.3 | -26.6 | -13.5 | -9.7 | -15.5 |
| Sales of property and equipment | 1.6 | 9.7 | 3.7 | 2.3 | 1.3 | 0.8 | 1.3 | 4.2 |
| Purchases of intangible assets | -0.2 | 0.0 | | -0.1 | -0.1 | | -0.1 | |
| Acquisitions | -2.0 | -17.8 | | -400.8 | | -38.6 | -0.2 | -3.5 |
| Cash from investing | -31.7 | -33.4 | -14.2 | -429.9 | -25.4 | -51.3 | -8.7 | -14.7 |
| |
| Cash dividends paid | -8.5 | -6.6 | -6.1 | -5.6 | -5.1 | -4.6 | -4.1 | -3.6 |
| Issuance of common stock, net | 0.0 | -0.3 | 0.7 | -2.2 | 2.1 | 2.2 | 1.4 | 2.0 |
| Financing costs | | | | -2.9 | | | -0.6 | |
| Other cash from financing | 33.0 | -16.1 | -158.9 | 354.1 | 25.2 | -10.0 | -75.2 | -46.4 |
| Cash from financing | 24.5 | -23.0 | -164.2 | 349.2 | 22.2 | -12.4 | -77.3 | -48.1 |
| |
| Free cash flow | -16.6 | 24.4 | 166.5 | 57.5 | -13.7 | 57.3 | 66.1 | 36.9 |
| Per share (diluted) | ($1.39) | $2.05 | $14.05 | $4.87 | ($1.16) | $4.91 | $5.71 | $3.22 |
| |
| Cash paid for interest | 14.6 | 10.2 | 17.0 | 9.5 | 5.2 | 5.2 | 5.8 | 6.9 |
| Cash paid for income taxes | 35.1 | 32.9 | 17.1 | 23.1 | 30.3 | 23.2 | 16.6 | 18.7 |