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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows from operating activities:    
Net income $ 418,017 $ 243,609
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 53,867 42,766
Net amortization (accretion) of premium (discount) on marketable securities (12,611) 2,091
Provision for doubtful accounts 1,282 52
Asset impairments 903 1,200
Non-cash interest expense 6,254 6,090
Net gain from change in fair value of debt securities (5,408) (390)
Stock-based compensation 157,635 153,157
Deferred income taxes (38,295) 15,732
Changes in operating assets and liabilities:    
Accounts receivable (118,249) (18,680)
Inventory (24,406) (72,051)
Prepaid expenses and other assets (57,376) (20,826)
Accounts payable, accrued and other liabilities 117,128 42,288
Warranty obligations 57,420 32,207
Deferred revenues 105,169 63,858
Net cash provided by operating activities 661,330 491,103
Cash flows from investing activities:    
Purchases of property and equipment (90,326) (30,014)
Investments in private companies (15,000) (1,000)
Business acquisitions, net of cash acquired 0 (27,680)
Purchases of marketable securities (1,743,674) (572,237)
Maturities and sale of marketable securities 1,406,608 377,156
Net cash used in investing activities (442,392) (253,775)
Cash flows from financing activities:    
Proceeds from exercise of equity awards and employee stock purchase plan 1,315 5,280
Payment of withholding taxes related to net share settlement of equity awards (93,100) (19,396)
Repurchase of common stock (310,000) 0
Net cash used in financing activities (401,785) (14,116)
Effect of exchange rate changes on cash and cash equivalents (322) (4,945)
Net increase (decrease) in cash and cash equivalents (183,169) 218,267
Cash and cash equivalents—Beginning of period 473,244 119,316
Cash and cash equivalents—End of period 290,075 337,583
Supplemental disclosures of non-cash investing and financing activities:    
Purchases of property and equipment included in accounts payable 16,183 5,366
Purchases of property and equipment through tenant improvement allowance $ 0 $ 748