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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income | $ 2,087,321 | $ 1,352,446 | $ 840,854
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation, amortization and other | 70,630 | 62,700 | 50,334
Noncash lease expense | 18,236 | 18,648 | 17,112
Stock-based compensation | 296,756 | 230,934 | 186,875
Deferred income taxes | (370,796) | (244,382) | (99,290)
Gain on strategic investments | (18,699) | (27,479) | 0
Amortization (accretion) of investment premiums (discount) | (33,518) | 12,767 | 26,847
Changes in operating assets and liabilities: |  |  |
Accounts receivable, net | (101,473) | (401,531) | (126,969)
Inventories | (655,474) | (638,948) | (170,449)
Other assets | (66,401) | (117,465) | (130,222)
Accounts payable | 198,612 | 31,436 | 66,681
Other liabilities | 123,694 | 70,704 | 78,187
Deferred revenue | 464,958 | 98,957 | 278,485
Income taxes, net | 20,168 | 44,026 | (2,589)
Net cash provided by operating activities | 2,034,014 | 492,813 | 1,015,856
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Proceeds from maturities of marketable securities | 1,887,939 | 1,643,824 | 1,455,465
Proceeds from sale of marketable securities | 67,284 | 193,782 | 19,607
Purchases of marketable securities | (2,606,878) | (1,418,857) | (2,317,264)
Purchases of property, equipment and intangible assets | (34,434) | (44,644) | (64,736)
Cash paid for business combination, net of cash acquired | 1,799 | (145,087) | 1,299
Investment in notes and privately-held companies | (3,164) | (12,691) | (19,933)
Net cash provided by (used in) investing activities | (687,454) | 216,327 | (925,562)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from issuance of common stock under equity plans | 62,093 | 48,411 | 67,245
Tax withholding paid on behalf of employees for net share settlement | (33,563) | (32,725) | (16,482)
Repurchase of common stock | (112,279) | (670,287) | (411,645)
Net cash used in financing activities | (83,749) | (654,601) | (360,882)
Effect of exchange rate changes | 675 | (3,611) | (1,816)
NET INCREASE/(DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | 1,263,486 | 50,928 | (272,404)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH —Beginning of period | 675,978 | 625,050 | 897,454
CASH, CASH EQUIVALENTS AND RESTRICTED CASH —End of period | 1,939,464 | 675,978 | 625,050
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: |  |  |
Cash paid for income taxes, net of refunds | 686,155 | 427,846 | 189,774
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION: |  |  |
Right-of-use assets obtained in exchange for new operating lease liabilities | 20,567 | 7,300 | 5,005
Common stock issued for business acquisition | $ 2,331 | $ 4,049 | $ 0

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