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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 134,298 | $ 200,376
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Deferred taxes | 17,464 | 28,979
Depreciation and amortization | 29,626 | 25,635
Stock-based compensation | 31,621 | 27,241
Non-cash operating lease cost | 7,526 | 5,911
Arbitration award gain | 0 | (43,403)
Other non-cash operating activities | 8,612 | 5,795
Changes in assets and liabilities: |  |
Accounts receivable | (55,543) | (67,423)
Inventories | (49,455) | (15,582)
Prepaid expenses and other assets | (48,665) | (34,858)
Accounts payable | 7,025 | (14,936)
Accrued and other long-term liabilities | (126,400) | (475)
Long-term income tax payable | 5,405 | 3,920
Deferred revenues | 68,984 | 106,007
Net cash provided by operating activities | 30,498 | 227,187
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchase of property, plant and equipment | (87,328) | (43,431)
Purchase of marketable securities | (15,041) | 0
Proceeds from maturities of marketable securities | 6,095 | 0
Proceeds from sales of marketable securities | 8,528 | 0
Repayment on unsecured promissory note | 0 | 4,594
Proceeds from arbitration award | 0 | 43,403
Other investing activities | (2,452) | 0
Net cash (used in) provided by investing activities | (90,198) | 4,566
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Proceeds from issuance of common stock | 14,827 | 13,133
Common stock repurchases | (75,036) | 0
Payroll taxes paid upon the vesting of equity awards | (51,533) | (66,568)
Net cash used in financing activities | (111,742) | (53,435)
Effect of foreign exchange rate changes on cash, cash equivalents, and restricted cash | (1,826) | (7,487)
Net (decrease) increase in cash, cash equivalents, and restricted cash | (173,268) | 170,831
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 | $ 926,871 | $ 1,132,305

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