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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Cash flow from operating activities:    
Net income $ 50,643 $ 47,534
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization expense 3,043 4,177
Provision for credit losses 173 206
Impairment of property and equipment 624 0
Impairment of non-marketable securities 1,967 0
Stock-based compensation, net of amounts capitalized 19,340 18,820
Accretion of discount on marketable securities, net (524) (1,107)
Deferred income taxes 1,841 (4,360)
Changes in operating assets and liabilities:    
Accounts receivable 35,941 42,782
Prepaid expenses and other assets (7,520) 162
Accounts payable 834 (66)
Accrued liabilities and other noncurrent liabilities (2,884) 8,265
Deferred revenues (8,184) (6,825)
Net cash provided by operating activities 95,294 109,588
Cash flow from investing activities:    
Purchases of marketable securities (78,469) (55,525)
Sales and maturities of marketable securities 73,760 50,532
Purchases of property and equipment (1,667) (2,038)
Net cash used in investing activities (6,376) (7,031)
Cash flow from financing activities:    
Repurchase of common stock (53,509) (39,653)
Proceeds from exercise of stock options 325 2,599
Payments for taxes related to net share settlement of equity awards (10,375) (10,831)
Proceeds from issuance of common stock through employee stock purchase plan 3,851 3,817
Net cash used in financing activities (59,708) (44,068)
Net increase in cash, cash equivalents and restricted cash 29,210 58,489
Cash, cash equivalents and restricted cash at beginning of period 251,458 233,382
Cash, cash equivalents and restricted cash at end of period $ 280,668 $ 291,871