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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 319,798 | $ 581,059
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Deferred taxes | 6,765 | 48,104
Depreciation and amortization | 92,096 | 79,141
Stock-based compensation | 98,679 | 84,498
Non-cash operating lease cost | 22,756 | 19,364
Arbitration award gain | 0 | (43,403)
Other non-cash operating activities | 26,216 | 15,651
Changes in assets and liabilities, net of effects of acquisitions: |  |
Accounts receivable | 32,284 | (216,081)
Inventories | (108,524) | (83,249)
Prepaid expenses and other assets | (32,440) | (74,736)
Accounts payable | (27,100) | 13,495
Accrued and other long-term liabilities | (213,378) | 107,159
Long-term income tax payable | 9,019 | 20,263
Deferred revenues | 197,854 | 348,430
Net cash provided by operating activities | 424,025 | 899,695
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Acquisitions, net of cash acquired | (12,304) | (8,002)
Purchase of property, plant and equipment | (238,696) | (292,002)
Purchase of marketable securities | (20,466) | 0
Proceeds from maturities of marketable securities | 22,456 | 0
Proceeds from sales of marketable securities | 93,647 | 0
Repayment on unsecured promissory note | 0 | 4,594
Proceeds from arbitration award | 0 | 43,403
Other investing activities | (2,143) | (3,712)
Net cash used in investing activities | (157,506) | (255,719)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from issuance of common stock | 26,149 | 25,623
Common stock repurchases | (275,036) | (275,038)
Payroll taxes paid upon the vesting of equity awards | (52,611) | (107,344)
Net cash used in financing activities | (301,498) | (356,759)
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash | (20,422) | (10,241)
Net (decrease) increase in cash, cash equivalents, and restricted cash | (55,401) | 276,976
Cash, cash equivalents, and restricted cash at beginning of the period | 1,100,139 | 961,474
Cash, cash equivalents, and restricted cash at end of the period | $ 1,044,738 | $ 1,238,450

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