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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash flows from operating activities: |  |  |
Net income | $ 504,918 | $ 547,629 | $ 523,672
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 648,410 | 570,776 | 592,754
Stock-based compensation | 393,378 | 328,467 | 217,185
Benefit for deferred income taxes | (70,268) | (22,987) | (104,971)
Amortization of debt issuance costs | 6,521 | 5,341 | 4,395
Loss (gain) on investments | 5,066 | (311) | 15,895
Other non-cash reconciling items, net | 65,488 | 50,221 | 31,063
Changes in operating assets and liabilities, net of effects of acquisitions: |  |  |
Accounts receivable | (22,300) | (49,203) | (21,214)
Prepaid expenses and other current assets | (46,094) | (18,726) | (20,125)
Accounts payable and accrued expenses | 344 | (39,825) | (26,499)
Deferred revenue | 20,687 | 48 | 16,713
Other current liabilities | 26,860 | 1,516 | (5,318)
Other non-current assets and liabilities | (13,839) | (24,507) | 51,126
Net cash provided by operating activities | 1,519,171 | 1,348,439 | 1,274,676
Cash flows from investing activities: |  |  |
Cash paid for business acquisitions, net of cash acquired | (434,066) | (106,171) | (872,091)
Cash paid for asset acquisitions | (132,835) | (120,985) | 0
Purchases of property and equipment | (390,433) | (457,909) | (241,266)
Capitalization of internal-use software development costs | (294,834) | (272,131) | (217,036)
Purchases of short- and long-term marketable securities | (236,176) | (1,461,890) | (17,975)
Proceeds from sales of short- and long-term marketable securities | 333,069 | 201,585 | 575,522
Proceeds from maturities and redemptions of short- and long-term marketable securities | 352,623 | 375,332 | 156,658
Other, net | 3,973 | (6,069) | (6,122)
Net cash used in investing activities | (798,679) | (1,848,238) | (622,310)
Cash flows from financing activities: |  |  |
Proceeds from borrowings under revolving credit facility | 0 | 90,000 | 125,000
Repayment of borrowings under revolving credit facility | 0 | (90,000) | (125,000)
Proceeds from the issuance of convertible senior notes, net of issuance costs | 0 | 1,247,388 | 0
Proceeds from the issuance of warrants related to convertible senior notes | 0 | 90,195 | 0
Purchases of note hedges related to convertible senior notes | 0 | (236,555) | 0
Proceeds related to the issuance of common stock under stock plans | 61,513 | 62,979 | 56,462
Employee taxes paid related to net share settlement of stock awards | (173,176) | (66,222) | (82,236)
Repurchases of common stock | (557,468) | (654,046) | (608,010)
Other, net | (10,504) | (360) | (393)
Net cash (used in) provided by financing activities | (679,635) | 443,379 | (634,177)
Effects of exchange rate changes on cash, cash equivalents and restricted cash | (12,243) | 3,868 | (12,918)
Net increase (decrease) in cash, cash equivalents and restricted cash | 28,614 | (52,552) | 5,271
Cash, cash equivalents and restricted cash at beginning of year | 490,470 | 543,022 | 537,751
Cash, cash equivalents and restricted cash at end of year | 519,084 | 490,470 | 543,022
Supplemental disclosure of cash flow information: |  |  |
Cash paid for income taxes, net of refunds received of $5,888, $11,006 and $15,458 for the years ended December 31, 2024, 2023 and 2022, respectively | 136,322 | 134,478 | 183,900
Cash paid for interest expense | 20,420 | 6,328 | 6,158
Cash paid for operating lease liabilities | 288,067 | 257,961 | 224,898
Non-cash activities: |  |  |
Operating lease right-of-use assets obtained in exchange for operating lease liabilities | 356,912 | 333,590 | 202,409
Purchases of property and equipment and capitalization of internal-use software development costs included in accounts payable and accrued expenses | 55,515 | 65,048 | 80,170
Capitalization of stock-based compensation | 107,488 | 83,676 | 33,060
Reconciliation of cash, cash equivalents and restricted cash: |  |  |
Cash and cash equivalents | 517,707 | 489,468 | 542,337
Restricted cash | 1,377 | 1,002 | 685
Cash, cash equivalents and restricted cash | $ 519,084 | $ 490,470 | $ 543,022

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- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-8 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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