| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 8-K | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | 65.0 | 87.0 | 69.3 | 46.9 | 15.1 | 12.3 | 5.3 | -0.7 |
| Depreciation and amortization | | | | 20.1 | 19.5 | 18.9 | 18.1 | 17.9 |
| Depreciation | | 22.5 | 20.9 | | | | | |
| Stock-based compensation | | | | 1.7 | 1.5 | 2.1 | 1.5 | 1.5 |
| Deferred taxes | | | | 0.8 | 7.0 | 9.3 | 0.0 | -3.6 |
| Change in working capital [+] | | | | -33.6 | -26.1 | -19.6 | -51.4 | 32.9 |
| Accounts receivable | | | | -72.2 | -26.6 | -19.4 | -52.9 | 6.3 |
| Inventories | | | | -5.8 | -5.3 | 0.9 | 1.2 | -1.0 |
| Other current assets | | | | -0.1 | 0.7 | -0.1 | -0.4 | -0.1 |
| Accounts payable | | | | 24.0 | -0.2 | 15.3 | 5.4 | -6.0 |
| Income taxes | | | | -0.5 | 0.3 | 0.0 | -0.7 | 0.1 |
| Other | | | | 21.0 | 4.9 | -16.4 | -4.0 | 33.6 |
| Other operating activities | -65.0 | | | -1.3 | -8.6 | -1.7 | -1.9 | -2.4 |
| Cash from operations | 0.0 | | | 34.6 | 8.2 | 21.3 | -28.5 | 45.6 |
| |
| Capital expenditures [+] | 0.0 | | | -31.5 | -19.1 | -22.7 | -19.1 | -14.1 |
| Purchases of property and equipment | | | | -31.5 | -19.1 | -22.7 | -19.1 | -14.1 |
| Sales of property and equipment | | | | 3.3 | 3.8 | 4.2 | 7.7 | 4.1 |
| Cash from investing | 0.0 | | | -28.2 | -15.3 | -18.5 | -11.3 | -10.0 |
| |
| Repurchase of common stock, net | | | | | -0.9 | | 0.0 | 0.0 |
| Other cash from financing | | | | -1.4 | -1.3 | -1.2 | -0.4 | |
| Cash from financing | 0.0 | | | -1.4 | -2.2 | -1.2 | -0.4 | 0.0 |
| |
| Free cash flow | 0.0 | | | 3.1 | -10.8 | -1.4 | -47.5 | 31.5 |
| Per share (diluted) | $0.00 | | | $0.01 | ($0.05) | ($0.01) | ($0.22) | $0.15 |
| |
| Cash paid for interest | | | | 0.1 | 0.0 | | | 0.0 |
| Cash paid for income taxes | | | | 0.5 | 0.3 | 4.5 | 3.0 | -28.9 |