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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

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