Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 203,725	$ 101,855
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	346,000	243,000
Amortization of deferred commissions	211,000	157,000
Stock-based compensation	828,000	625,000
Deferred income taxes	(21,000)	(6,000)
Repayments of convertible senior notes attributable to debt discount	(15,000)	(69,000)
Loss on extinguishment of 2022 Notes	3,000	42,000
Other	34,000	23,000
Changes in operating assets and liabilities, net of effect of business combinations:
Accounts receivable	219,000	210,000
Deferred commissions	(344,000)	(221,000)
Prepaid expenses and other assets	(78,000)	(42,000)
Accounts payable	39,000	2,000
Deferred revenue	47,000	66,000
Accrued expenses and other liabilities	(126,000)	(31,000)
Net cash provided by operating activities	1,347,000	1,101,000
Cash flows from investing activities:
Purchases of property and equipment	(292,000)	(285,000)
Business combinations, net of cash acquired	(778,000)	(108,000)
Purchases of investments	(1,769,000)	(2,229,000)
Sales and maturities of investments	1,579,000	1,299,000
Other	12,000	(7,000)
Net cash used in investing activities	(1,248,000)	(1,330,000)
Cash flows from financing activities:
Net proceeds from borrowings on 2030 Notes	0	1,482,000
Repayments of convertible senior notes attributable to principal	(59,000)	(1,569,000)
Net proceeds from unwind of 2022 Note Hedge	0	1,106,000
Proceeds from employee stock plans	165,000	142,000
Taxes paid related to net share settlement of equity awards	(457,000)	(361,000)
Net cash (used in) provided by financing activities	(351,000)	800,000
Foreign currency effect on cash, cash equivalents and restricted cash	(21,000)	3,000
Net change in cash, cash equivalents and restricted cash	(273,000)	574,000
Cash, cash equivalents and restricted cash at beginning of period	1,679,000	778,000
Cash, cash equivalents and restricted cash at end of period	1,406,000	1,352,000
Cash, cash equivalents and restricted cash at end of period:
Cash and cash equivalents	1,400,000	1,348,000
Restricted cash included in prepaid expenses and other current assets	6,000	4,000
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	1,406,000	1,352,000
Supplemental disclosures of other cash flow information:
Interest paid	36,000	0
Income taxes paid, net of refunds	46,000	26,000
Non-cash investing and financing activities:
Settlement of 2022 Notes conversion feature	216,000	79,000
Benefit from exercise of 2022 Note Hedge	215,000	78,000
Property and equipment included in accounts payable and accrued expenses	$ 54,000	$ 27,000