Consolidated statements of cash flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net income (loss)	$ (96,047)	$ 316,438	$ (128,323)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	46,489	27,500	36,988
Share-based compensation	497,123	415,382	321,020
Non-cash charitable contributions	0	45,300	2,748
Other	(13,889)	9,607	8,332
Changes in assets and liabilities:
Accounts receivable	(28,856)	(88,862)	(253,173)
Prepaid expenses and other assets	(30,214)	(14,727)	4,128
Operating lease right-of-use assets	56,024	43,995	41,898
Accounts payable	70,777	(33,451)	15,721
Accrued expenses and other liabilities	20,627	82,435	23,647
Operating lease liabilities	(52,832)	(50,710)	(44,160)
Net cash provided by operating activities	469,202	752,907	28,826
Investing activities
Purchases of property and equipment and intangible assets	(28,984)	(9,031)	(17,401)
Purchases of marketable securities	(1,028,480)	(1,104,087)	(1,216,260)
Sales of marketable securities	7,417	274,654	265,422
Maturities of marketable securities	1,007,861	849,520	920,300
Acquisition of business, net of cash acquired	(86,059)	(36,914)	0
Other investing activities	0	0	316
Net cash used in investing activities	(128,245)	(25,858)	(47,623)
Financing activities
Proceeds from exercise of stock options, net	12,882	23,912	78,282
Shares repurchased for tax withholdings on release of restricted stock units and restricted stock awards	(161,809)	0	(56,894)
Payment of deferred offering costs and other financing activities	0	(1,750)	(1,750)
Net cash (used in) provided by financing activities	(148,927)	22,162	19,638
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,434)	(1,058)	327
Net increase in cash, cash equivalents and restricted cash	190,596	748,153	1,168
Cash, cash equivalents and restricted cash, beginning of period	1,427,064	678,911	677,743
Cash, cash equivalents and restricted cash, end of period	1,617,660	1,427,064	678,911
Supplemental cash flow information
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 31,515	$ 118,977	$ 15,089