| In millions, except per share items | Jun-30-22 | Jun-30-21 | Jun-30-20 | Jun-30-19 | Jun-05-19 | Jun-30-18 | Jun-30-17 | Jun-30-16 |
| | 10-K | 10-K | 10-K | 10-K | 8-K | 10-K | 10-K | 10-K |
| Operating activities: | | | | | | | | |
| Net income | 163.4 | 114.3 | 64.7 | 69.7 | | 31.0 | 31.1 | 20.3 |
| Adjustments to reconcile net income to net cash from operating activities: | | | | | | | | |
| Non-cash compensation expense | 6.3 | 5.6 | 3.0 | 2.6 | | 2.0 | 1.4 | 1.9 |
| Non-cash compensation to directors | 1.1 | 0.8 | 0.8 | 0.8 | | 0.8 | 0.7 | 0.8 |
| Depreciation | 19.4 | 15.6 | 12.2 | 10.0 | | 7.7 | | 3.3 |
| Amortization | 7.0 | 7.3 | 6.1 | 6.0 | | 5.2 | | 2.2 |
| Deferred income taxes | 4.8 | 7.0 | 8.7 | 6.8 | | 45.8 | 9.6 | 5.2 |
| Other items, net | 1.4 | 2.1 | 2.2 | 0.8 | | 0.8 | -0.9 | |
| Change in operating assets and liabilities: | | | | | | | | |
| Trade receivables | -1.8 | -32.9 | 14.2 | -3.0 | | -12.2 | 4.9 | -5.2 |
| Inventories | -38.1 | -35.6 | -5.3 | -15.4 | | -6.3 | -3.3 | -0.1 |
| Prepaid expenses and other assets | | | | | | | | |
| Accounts payable | -0.3 | 24.5 | -5.8 | -2.8 | | 4.6 | -5.0 | 7.0 |
| Income taxes payable | -0.8 | 3.5 | -1.2 | 0.1 | | 1.7 | 0.3 | -1.9 |
| Accrued expenses | 10.6 | 24.9 | -0.2 | 9.6 | | 6.5 | 5.8 | 1.4 |
| Other liabilities | -4.1 | -5.3 | -0.8 | 1.1 | | 0.3 | 0.1 | 0.0 |
| Net cash provided by operating activities | 164.8 | 131.3 | 94.1 | 81.5 | | 58.5 | 35.9 | 35.6 |
| |
| Investing activities: | | | | | | | | |
| Purchases of property, plant and equipment | -55.1 | -30.7 | -41.3 | -17.9 | | -10.4 | -9.3 | -6.2 |
| Net cash used in investing activities | -61.6 | -181.1 | -40.4 | -118.0 | | -135.9 | -9.2 | -6.0 |
| |
| Financing activities: | | | | | | | | |
| Proceeds from revolving credit facility | 72.0 | 65.0 | 103.8 | 90.0 | | | | |
| Payments on revolving credit facility | -76.3 | -0.6 | -135.0 | -35.0 | | -50.0 | -72.0 | |
| Payment of deferred financing costs | | -0.6 | | -0.4 | | -1.1 | -0.9 | |
| Proceeds received from exercise of stock options | 3.3 | 0.4 | 0.4 | 0.7 | | | | |
| Cash paid for withholding taxes on vested restricted stock | -2.1 | -1.2 | -0.8 | -1.2 | | -0.7 | -0.3 | -0.2 |
| Distributions to LLC Unit holders | -2.7 | -1.8 | -1.8 | -1.8 | | -1.6 | -1.5 | -1.4 |
| Repurchase and retirement of common stock | -34.6 | | -13.8 | | | | | -4.0 |
| Net cash used in financing activities | -60.4 | 57.3 | -47.3 | 2.4 | | 106.2 | -19.7 | -12.0 |
| Effect of exchange rate changes on cash | -0.6 | 0.1 | 0.0 | -0.1 | | | 0.0 | |
| Changes in cash | 42.3 | 7.7 | 6.4 | -34.2 | | 28.8 | 6.9 | |
| |
| Supplemental cash flow information: | | | | | | | | |
| Cash paid for interest | 2.3 | 2.0 | 3.8 | 6.0 | | 4.4 | 2.3 | 3.1 |
| Cash paid for income taxes | 42.1 | 23.5 | 10.5 | 14.2 | | 9.9 | 7.2 | 8.1 |