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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Cash flows from operating activities:    
Net income $ 250,072 $ 197,805
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 103,931 108,766
Gains from sale of investments 0 (2)
Share-based compensation expense 112,631 88,460
Amortization of operating lease right-of-use assets 7,160 7,262
Deferred income tax benefit 26,382 (41,504)
Other 82 228
Changes in operating assets and liabilities, exclusive of effects of acquired companies:    
Accounts receivable (72,561) (7,901)
Income tax payable (24,786) 20,019
Prepaid expenses and other current assets (16,894) (28,157)
Accounts payable (8,959) (922)
Operating lease liabilities (8,507) (9,392)
Accrued liabilities (21,636) 6,510
Deferred revenue 57,320 49,383
Other long-term liabilities 5,425 9,304
Net cash provided by operating activities 409,660 399,859
Cash flows from investing activities:    
Additions to property and equipment (11,698) (16,734)
Purchase of marketable security investments (179,966) 0
Proceeds and maturities from marketable security investments 76,307 7,700
Investment in software development (14,138) (24,412)
Cost of acquisitions, net of cash acquired (35,137) (1,395)
Other 525 168
Net cash used by investing activities (164,107) (34,673)
Cash flows from financing activities:    
Payment on term loans 0 (50,000)
Payment of debt issuance costs 0 (2,637)
Purchase of treasury shares (174,650) 0
Proceeds from exercise of stock options, net of withheld shares for taxes upon equity award settlement 12,306 47,433
Contributions from employee stock purchase plan 13,883 12,821
Other (7,712) 0
Net cash (used) provided by financing activities (156,173) 7,617
Net increase in cash and cash equivalents 89,380 372,803
Cash and cash equivalents at beginning of period 744,721 165,493
Cash and cash equivalents at end of period 834,101 538,296
Supplemental cash flow information:    
Cash paid for interest 2,164 2,860
Cash paid for income taxes, net 47,339 45,660
Non-cash investing and financing activities:    
Non-cash additions to property and equipment $ 552 $ 111