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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Operating activities |  |
Net loss | $ (24,812) | $ (208,579)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation and amortization | 4,861 | 6,212
Share-based compensation | 162,473 | 143,122
Impairment and abandonment charges for leases and leasehold improvements | 0 | 112,934
Net amortization of investment premium and discount | (6,788) | (4,198)
Other | (2,695) | 2,852
Changes in assets and liabilities: |  |
Accounts receivable | 201,188 | 192,523
Prepaid expenses and other assets | (10,240) | (5,773)
Operating lease right-of-use assets | 8,727 | 25,163
Accounts payable | 4,639 | (11,031)
Accrued expenses and other liabilities | 29,688 | (43,659)
Operating lease liabilities | (10,895) | (26,109)
Net cash provided by operating activities | 356,146 | 183,457
Investing activities |  |
Purchases of property and equipment | (12,113) | (1,990)
Purchases of marketable securities | (336,522) | (331,608)
Sales of marketable securities | 2,999 | 29,271
Maturities of marketable securities | 342,517 | 318,490
Net cash (used in) provided by investing activities | (3,119) | 14,163
Financing activities |  |
Proceeds from exercise of stock options, net | 16,756 | 2,400
Repurchases of Class A common stock | 0 | (69,476)
Shares repurchased for tax withholdings on release of restricted stock units and restricted stock awards | (99,708) | (91,508)
Net cash used in financing activities | (82,952) | (158,584)
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (709) | 1,142
Net increase in cash, cash equivalents and restricted cash | 269,366 | 40,178
Cash, cash equivalents and restricted cash, beginning of period | 1,368,532 | 1,617,660
Cash, cash equivalents and restricted cash, end of period | 1,637,898 | 1,657,838
Supplemental cash flow information |  |
Repurchases of Class A common stock in accrued expenses and other current liabilities | 0 | 2,161
Operating lease right-of-use assets obtained in exchange for operating lease liabilities | $ 2,057 | $ 803

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