| In millions, except per share items | Jun-30-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Operating activities | | | | | | | | |
| Net income | 115.9 | | 50.9 | 97.3 | 42.8 | 70.9 | 78.4 | 56.5 |
| |
| Adjustments to reconcile net income to cash provided by operating activities: | | | | | | | | |
| Depreciation and amortization | | | 43.6 | 36.8 | 32.1 | 25.5 | 23.5 | 20.9 |
| Share-based compensation | | | 32.6 | 29.1 | 26.3 | 27.5 | 31.6 | 28.0 |
| Non-cash interest expense | | | 1.6 | 1.6 | | | 2.1 | 2.1 |
| Realized (gain) loss on equity investment | | | | -0.2 | | | | |
| Deferred income taxes | | | -19.9 | 0.1 | 15.6 | 0.1 | 0.4 | -0.3 |
| Other non-cash income and expenses | | | 12.2 | 3.8 | 13.1 | 14.5 | 8.0 | 8.0 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable, net | | | -17.0 | -30.1 | 15.1 | -35.7 | -40.0 | -14.9 |
| Inventory | | | 1.1 | 15.6 | -6.0 | -21.7 | -29.5 | -55.0 |
| Prepaid and other assets | | | 15.4 | -97.9 | -3.1 | 8.9 | -6.9 | -20.2 |
| Operating lease right-of-use assets and liabilities, net | | | -2.5 | -0.9 | | -1.2 | 0.4 | 0.7 |
| Accounts payable and accrued liabilities | | | 51.9 | 13.0 | -47.4 | 132.0 | -8.3 | 0.9 |
| Accrued payroll and related expenses | | | 9.4 | -40.5 | 9.9 | 16.7 | 16.8 | -33.0 |
| Deferred revenue and other liabilities | | | 2.9 | 2.8 | 2.0 | 3.7 | 1.9 | 1.1 |
| Net cash provided by operating activities | 115.9 | | 172.8 | 71.0 | 105.8 | 247.3 | 61.6 | 27.8 |
| |
| Investing activities | | | | | | | | |
| Purchases of marketable securities | | | -597.2 | -546.5 | -932.9 | -368.3 | -369.9 | -802.0 |
| Proceeds from sale and maturity of marketable securities | | | 543.8 | 241.8 | 501.0 | 537.0 | 838.3 | 790.0 |
| Purchases of property and equipment | | | -91.5 | -101.6 | -80.2 | -108.1 | -101.2 | -99.7 |
| Acquisitions, net of cash acquired | | | | -3.2 | 1.4 | -31.6 | | |
| Other investing activities | | | | -2.3 | 14.6 | | -4.0 | -0.5 |
| Net cash used in investing activities | | | -144.9 | -411.8 | -496.1 | 29.0 | 363.2 | -112.2 |
| |
| Financing activities | | | | | | | | |
| Net proceeds from issuance of common stock | | | | 10.1 | | 11.6 | | 8.7 |
| Purchases of treasury stock | | | | | | | | |
| Proceeds from issuance of senior convertible notes, net of issuance costs | | | | | | | | |
| Other financing activities | | | -4.3 | -4.8 | -0.8 | -0.8 | -0.4 | -7.9 |
| Net cash provided by financing activities | | | -4.3 | 5.3 | -0.8 | 10.8 | -0.4 | 0.8 |
| Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | -4.3 | -1.0 | -0.5 | -1.0 | 0.5 | -0.4 |
| Increase (decrease) in cash, cash equivalents and restricted cash | | | -317.2 | | | | 340.9 | |
| |
| Reconciliation of cash, cash equivalents and restricted cash, end of period: | | | | | | | | |
| Cash and cash equivalents | | | | | | | | |
| Restricted cash | | | | | | | | |
| |
| Supplemental disclosure of non-cash investing and financing transactions: | | | | | | | | |
| Shares issued for conversions of 2023 Notes | | | | | | | | |
| Shares received under note hedge upon conversion of 2023 Notes | | | | | | | | |
| Acquisition of property and equipment included in accounts payable and accrued liabilities | | | 33.2 | 26.6 | 15.2 | -13.0 | 8.2 | 35.0 |
| Right-of-use assets obtained in exchange for operating lease liabilities | | | -0.8 | | | | | |
| Right-of-use assets obtained in exchange for finance lease liabilities | | | 15.7 | | | | | |