Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net income (loss)	$ (48,357)	$ 47,743
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	16,355	13,537
Share-based compensation	190,653	179,720
Non-cash charitable contributions	0	20,490
Other	12,473	9,398
Changes in assets and liabilities:
Accounts receivable	143,877	98,686
Prepaid expenses and other assets	(31,057)	(18,342)
Operating lease right-of-use assets	25,103	20,643
Accounts payable	40,557	(1,498)
Accrued expenses and other liabilities	10,605	25,662
Operating lease liabilities	(26,752)	(20,646)
Net cash provided by operating activities	333,457	375,393
Investing activities
Purchases of property and equipment and intangible assets	(19,916)	(3,428)
Purchases of marketable securities	(367,806)	(571,216)
Sales of marketable securities	4,168	154,586
Maturities of marketable securities	393,784	373,162
Acquisition of business, net of cash acquired	(86,059)	0
Net cash used in investing activities	(75,829)	(46,896)
Financing activities
Proceeds from exercise of stock options, net	4,080	14,935
Shares repurchased for tax withholdings on release of restricted stock units and restricted stock awards	(37,953)	0
Net cash (used in) provided by financing activities	(33,873)	14,935
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,947)	(305)
Net increase in cash, cash equivalents and restricted cash	221,808	343,127
Cash, cash equivalents and restricted cash, beginning of period	1,427,064	678,911
Cash, cash equivalents and restricted cash, end of period	1,648,872	1,022,038
Supplemental cash flow information
Accrued property and equipment	7,314	905
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 15,899	$ 1,657