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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash flows from operating activities:    
Net income $ 174,692 $ 165,679
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 74,761 68,943
Gains from sale of investments (4) 0
Share-based compensation expense 80,821 75,962
Amortization of operating lease right-of-use assets 5,892 4,860
Deferred income tax benefit 31,866 (11,080)
Gain on remeasurement of equity investment (25,048) 0
Other 33 39
Changes in operating assets and liabilities, exclusive of effects of acquired companies:    
Accounts receivable (82,931) (126,188)
Income tax payable 379 (5,626)
Prepaid expenses and other current assets (12,154) (25,712)
Accounts payable 2,981 14,765
Operating lease liabilities (4,867) (5,663)
Accrued liabilities (21,386) (19,727)
Deferred revenue 3,006 18,531
Other long-term liabilities 3,632 (314)
Net cash provided by operating activities 231,673 154,469
Cash flows from investing activities:    
Additions to property and equipment (8,288) (7,822)
Purchase of marketable security investments (51,481) (107,286)
Proceeds and maturities from marketable security investments 73,760 34,284
Investment in software development (2,105) (10,400)
Cost of acquisitions, net of cash acquired (214,291) (18,230)
Other 13 526
Net cash used by investing activities (202,392) (108,928)
Cash flows from financing activities:    
Repayment of convertible senior notes due 2026 (600,000) 0
Proceeds from issuance of convertible senior notes due 2031 1,437,500 0
Purchase of capped call transactions (187,163) 0
Payment of debt issuance costs (31,704) 0
Purchase of treasury shares (755,005) (1,605)
Payment of employee taxes paid for withheld shares upon equity award settlement, net of proceeds from exercise of stock options (22,134) (3,155)
Contributions from employee stock purchase plan 9,178 9,322
Other 0 (7,377)
Net cash used by financing activities (149,328) (2,815)
Net (decrease) increase in cash and cash equivalents (120,047) 42,726
Cash and cash equivalents at beginning of period 1,015,400 744,721
Cash and cash equivalents at end of period 895,353 787,447
Supplemental cash flow information:    
Cash paid for interest 2,069 969
Cash paid for income taxes, net 16,467 46,293
Non-cash investing and financing activities:    
Non-cash additions to property and equipment 248 502
Accrued excise taxes for treasury repurchases $ 6,227 $ 0