UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net (loss)	$ (379)	$ (6,617)
Adjustments to reconcile net (loss) to cash provided by operating activities
Stock-based compensation	28,227	30,100
Deferred income taxes	(9,295)	(15,068)
Loss on capped call transactions	30,560	19,117
Amortization of deferred commissions	17,221	11,496
Lease expense	3,919	3,238
Amortization of intangible assets and depreciation	4,171	7,006
Foreign currency transaction (gain) loss	(2,876)	5,098
Other non-cash	(1,100)	1,634
Change in operating assets and liabilities, net	(55,332)	(34,354)
Cash provided by operating activities	15,116	21,650
Investing activities
Purchases of investments	(33,690)	(21,051)
Proceeds from maturities and called investments	20,915	40,867
Sales of investments	13,350	2,450
Payments for acquisitions, net of cash acquired	0	(4,993)
Investment in property and equipment	(6,657)	(1,784)
Cash (used in) provided by investing activities	(6,082)	15,489
Financing activities
Proceeds from employee stock purchase plan	2,446	2,288
Dividend payments to stockholders	(2,454)	(2,427)
Common stock repurchases	(35,910)	(34,655)
Cash (used in) financing activities	(35,918)	(34,794)
Effect of exchange rate changes on cash and cash equivalents	(310)	(1,536)
Net (decrease) increase in cash and cash equivalents	(27,194)	809
Cash and cash equivalents, beginning of period	159,965	171,899
Cash and cash equivalents, end of period	$ 132,771	$ 172,708