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