| 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 | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Total revenues | 398.7 | 344.9 | 348.7 | 349.0 | 357.2 | 322.4 | 334.6 | 338.2 |
| Total revenues growth | 14.2% | 7.0% | 4.2% | 3.2% | 7.8% | 3.2% | -10.6% | 7.8% |
| Operating expenses: | | | | | | | | |
| Cost of revenues | 71.8 | 76.6 | 82.5 | 78.7 | 71.8 | 69.2 | 72.4 | 82.2 |
| Research and development | 41.5 | 36.6 | 35.5 | 35.9 | 36.4 | 39.0 | 41.1 | 45.8 |
| Selling, general and administrative | 108.1 | 93.0 | 151.9 | 93.2 | 96.4 | 98.0 | 155.5 | 107.7 |
| Amortization of intangible assets | 0.3 | 0.3 | 0.4 | 0.5 | 0.5 | 0.5 | 0.6 | 0.8 |
| Total operating expenses | 221.7 | 411.0 | 1,105.1 | 208.4 | 205.1 | 206.8 | 504.8 | 380.4 |
| Operating income | 177.0 | 140.3 | 134.2 | 140.6 | 152.1 | 115.6 | 115.2 | 194.4 |
| Operating margin | 44.4% | 40.7% | 38.5% | 40.3% | 42.6% | 35.9% | 34.4% | 57.5% |
| Interest expense, net | -24.5 | -22.8 | -20.8 | -18.7 | -17.2 | -12.2 | -10.5 | -10.0 |
| Other income (expense), net | 5.3 | 0.4 | -0.2 | -1.0 | -2.4 | 1.4 | 0.8 | 3.5 |
| Provision for income taxes | 29.0 | 20.3 | 22.4 | 27.4 | 28.1 | 19.9 | 19.7 | 36.7 |
| Net income | 128.8 | 97.6 | 90.7 | 93.5 | 104.4 | 85.0 | 85.7 | 151.2 |
| |
| Other comprehensive income (loss): | | | | | | | | |
| Foreign currency translation adjustments | 5.1 | 18.4 | -21.0 | -22.5 | -3.2 | -2.1 | -12.3 | 4.2 |
| Comprehensive income | 133.8 | 116.0 | 69.7 | 71.0 | 101.2 | 82.8 | 73.4 | 155.4 |
| |
| Earnings per share: | | | | | | | | |
| Basic (in dollars per share) | $5.16 | $3.90 | $3.59 | $3.65 | $3.99 | $3.13 | $3.07 | $5.27 |
| Diluted (in dollars per share) | $5.08 | $3.84 | $3.55 | $3.61 | $3.95 | $3.09 | $3.02 | $5.18 |
| |
| Shares used in computing earnings per share: | | | | | | | | |
| Basic (in shares) | 25.0 | 25.0 | 26.0 | 25.6 | 26.1 | 27.2 | 28.7 | 28.7 |
| Diluted (in shares) | 25.3 | 25.4 | 26.3 | 25.9 | 26.4 | 27.5 | 29.3 | 29.2 |
| Gain (Loss) on Disposition of Assets | | 1.9 | | | | | | |