Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities
Net loss	$ (243,521)	$ (48,357)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	11,283	16,355
Share-based compensation	312,752	190,653
Impairment and abandonment charges for leases and leasehold improvements	117,315	0
Other	(4,501)	12,473
Changes in assets and liabilities:
Accounts receivable	136,827	143,877
Prepaid expenses and other assets	(23,048)	(31,057)
Operating lease right-of-use assets	34,595	25,103
Accounts payable	(24,295)	40,557
Accrued expenses and other liabilities	(31,663)	10,605
Operating lease liabilities	(39,568)	(26,752)
Net cash provided by operating activities	246,176	333,457
Investing activities
Purchases of property and equipment and intangible assets	(2,800)	(19,916)
Purchases of marketable securities	(654,349)	(367,806)
Sales of marketable securities	29,271	4,168
Maturities of marketable securities	609,402	393,784
Acquisition of business, net of cash acquired	0	(86,059)
Net cash used in investing activities	(18,476)	(75,829)
Financing activities
Proceeds from exercise of stock options, net	3,216	4,080
Repurchases of Class A common stock	(500,000)	0
Shares repurchased for tax withholdings on release of restricted stock units and restricted stock awards	(163,203)	(37,953)
Net cash used in financing activities	(659,987)	(33,873)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1,075	(1,947)
Net increase (decrease) in cash, cash equivalents and restricted cash	(431,212)	221,808
Cash, cash equivalents and restricted cash, beginning of period	1,617,660	1,427,064
Cash, cash equivalents and restricted cash, end of period	1,186,448	1,648,872
Supplemental cash flow information
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 13,809	$ 15,899