CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income	$ 346,854	$ 491,108
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	444,184	408,933
Stock-based compensation	158,811	153,804
Benefit for deferred income taxes	(34,547)	(30,335)
Amortization of debt discount and issuance costs	3,296	49,284
Loss on investments	15,895	8,898
Other non-cash reconciling items, net	25,094	3,117
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	26,849	(15,225)
Prepaid expenses and other current assets	(42,871)	(15,099)
Accounts payable and accrued expenses	(64,727)	(16,263)
Deferred revenue	23,503	8,263
Other current liabilities	(3,808)	(17,958)
Other non-current assets and liabilities	34,645	(10,864)
Net cash provided by operating activities	933,178	1,017,663
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired	(872,091)	(15,638)
Purchases of property and equipment	(176,017)	(265,131)
Capitalization of internal-use software development costs	(171,497)	(170,404)
Purchases of short- and long-term marketable securities	0	(611,732)
Proceeds from sales of short- and long-term marketable securities	575,522	438,370
Proceeds from maturities and redemptions of short- and long-term marketable securities	120,433	823,255
Other, net	(4,003)	(1,665)
Net cash (used in) provided by investing activities	(527,653)	197,055
Cash flows from financing activities:
Proceeds related to the issuance of common stock under stock plans	45,989	46,942
Employee taxes paid related to net share settlement of stock-based awards	(71,656)	(88,195)
Repurchases of common stock	(430,269)	(251,257)
Other, net	(281)	(268)
Net cash used in financing activities	(456,217)	(292,778)
Effects of exchange rate changes on cash, cash equivalents and restricted cash	(27,237)	(9,228)
Net (decrease) increase in cash, cash equivalents and restricted cash	(77,929)	912,712
Cash, cash equivalents and restricted cash at beginning of period	537,751	353,466
Cash, cash equivalents and restricted cash at end of period	459,822	1,266,178
Supplemental disclosures of cash flow information:
Cash paid for income taxes, net of refunds received of $8,499 and $14,261 for the nine months ended September 30, 2022 and 2021, respectively	132,726	82,003
Cash paid for interest expense	5,031	5,031
Cash paid for operating lease liabilities	168,215	167,457
Non-cash activities:
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	139,814	173,427
Purchases of property and equipment and capitalization of internal-use software development costs included in accounts payable and accrued expenses	46,016	56,401
Capitalization of stock-based compensation	24,499	28,271
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	457,816	1,264,590
Restricted cash	2,006	1,588
Cash, cash equivalents and restricted cash	$ 459,822	$ 1,266,178