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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash flow from operating activities:    
Net income $ 103,048 $ 94,824
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization expense 6,105 8,155
Provision for credit losses 328 850
Impairment of property and equipment 624 0
Impairment of non-marketable securities 1,967 0
Stock-based compensation, net of amounts capitalized 38,153 36,866
Accretion of discount on marketable securities, net (857) (2,008)
Deferred income taxes 4,278 (8,605)
Changes in operating assets and liabilities:    
Accounts receivable 30,884 35,026
Prepaid expenses and other assets (7,748) (4,609)
Accounts payable (96) 699
Accrued liabilities and other noncurrent liabilities (6,678) 3,683
Deferred revenues (15,100) (21,522)
Net cash provided by operating activities 154,908 143,359
Cash flow from investing activities:    
Purchases of marketable securities (146,477) (183,545)
Sales and maturities of marketable securities 137,437 100,770
Purchases of property and equipment (5,367) (3,365)
Net cash used in investing activities (14,407) (86,140)
Cash flow from financing activities:    
Repurchase of common stock (131,388) (89,545)
Proceeds from exercise of stock options 934 5,577
Payments for taxes related to net share settlement of equity awards (13,865) (15,267)
Proceeds from issuance of common stock through employee stock purchase plan 3,851 3,817
Net cash used in financing activities (140,468) (95,418)
Net increase (decrease) in cash, cash equivalents and restricted cash 33 (38,199)
Cash, cash equivalents and restricted cash at beginning of period 251,458 233,382
Cash, cash equivalents and restricted cash at end of period $ 251,491 $ 195,183