Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities
Net loss	$ (208,579)	$ (5,281)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	6,212	7,220
Share-based compensation	143,122	73,240
Impairment and abandonment charges for leases and leasehold improvements	112,934	0
Other	(1,346)	2,978
Changes in assets and liabilities:
Accounts receivable	192,523	180,203
Prepaid expenses and other assets	(5,773)	(8,285)
Operating lease right-of-use assets	25,163	12,394
Accounts payable	(11,031)	(4,638)
Accrued expenses and other liabilities	(43,659)	(31,620)
Operating lease liabilities	(26,109)	(12,822)
Net cash provided by operating activities	183,457	213,389
Investing activities
Purchases of property and equipment and intangible assets	(1,990)	(6,902)
Purchases of marketable securities	(331,608)	(155,181)
Sales of marketable securities	29,271	4,168
Maturities of marketable securities	318,490	207,319
Net cash provided by investing activities	14,163	49,404
Financing activities
Proceeds from exercise of stock options, net	2,400	1,036
Shares repurchased for tax withholdings on release of restricted stock units and restricted stock awards	(91,508)	0
Repurchases of Class A common stock	(69,476)	0
Net cash (used in) provided by financing activities	(158,584)	1,036
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1,142	333
Net increase in cash, cash equivalents and restricted cash	40,178	264,162
Cash, cash equivalents and restricted cash, beginning of period	1,617,660	1,427,064
Cash, cash equivalents and restricted cash, end of period	1,657,838	1,691,226
Supplemental cash flow information
Repurchase Of Common Stock In Accrued Expenses And Other Current Liabilities	2,161	0
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 803	$ 7,085