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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities:    
Net income $ 365,013 $ 386,464
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 480,461 423,142
Stock-based compensation 294,333 236,344
Provision (benefit) for deferred income taxes 938 (9,763)
Amortization of debt issuance costs 4,933 3,600
Other non-cash reconciling items, net 45,757 44,891
Changes in operating assets and liabilities, net of effects of acquisitions:    
Accounts receivable 28,092 (46,262)
Prepaid expenses and other current assets (25,480) (16,103)
Accounts payable and accrued expenses (79,191) (60,170)
Deferred revenue 13,978 24,146
Other current liabilities 42,350 2,290
Other non-current assets and liabilities 4,199 (29,333)
Net cash provided by operating activities 1,175,383 959,246
Cash flows from investing activities:    
Cash paid for business acquisitions, net of cash acquired (434,066) (106,171)
Cash paid for asset acquisition (4,862) (36,348)
Purchases of property and equipment (297,548) (387,505)
Capitalization of internal-use software development costs (224,860) (208,648)
Purchases of short- and long-term marketable securities (201,641) (1,184,837)
Proceeds from sales of short- and long-term marketable securities 307,701 200,894
Proceeds from maturities and redemptions of short- and long-term marketable securities 296,623 197,641
Other, net 4,160 (7,431)
Net cash used in investing activities (554,493) (1,532,405)
Cash flows from financing activities:    
Proceeds from borrowings under revolving credit facility 0 90,000
Repayment of borrowings under revolving credit facility 0 (90,000)
Proceeds from the issuance of convertible senior notes, net of issuance costs 0 1,247,388
Proceeds from the issuance of warrants related to convertible senior notes 0 90,195
Purchase of note hedge related to convertible senior notes 0 (236,555)
Proceeds related to the issuance of common stock under stock plans 47,708 49,553
Employee taxes paid related to net share settlement of stock awards (157,115) (50,910)
Repurchases of common stock (419,097) (599,155)
Other, net (10,291) (360)
Net cash (used in) provided by financing activities (538,795) 500,156
Effects of exchange rate changes on cash, cash equivalents and restricted cash 188 (7,729)
Net increase (decrease) in cash, cash equivalents and restricted cash 82,283 (80,732)
Cash, cash equivalents and restricted cash at beginning of period 490,470 543,022
Cash, cash equivalents and restricted cash at end of period 572,753 462,290
Supplemental disclosures of cash flow information:    
Cash paid for income taxes, net of refunds received of $5,499 and $7,462 for the nine months ended September 30, 2024 and 2023, respectively 111,430 109,820
Cash paid for interest expense 19,556 5,610
Cash paid for operating lease liabilities 213,459 187,888
Non-cash activities:    
Operating lease right-of-use assets obtained in exchange for operating lease liabilities 285,494 252,961
Purchases of property and equipment and capitalization of internal-use software development costs included in accounts payable and accrued expenses 35,660 56,345
Capitalization of stock-based compensation 81,636 60,325
Reconciliation of cash and cash equivalents, and restricted cash:    
Cash and cash equivalents 569,749 459,907
Restricted cash 3,004 2,383
Cash, cash equivalents and restricted cash $ 572,753 $ 462,290