Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 547,629	$ 523,672	$ 651,642
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	570,776	592,754	550,632
Stock-based compensation	328,467	217,185	202,759
Benefit for deferred income taxes	(22,987)	(104,971)	(47,794)
Amortization of debt discount and issuance costs	5,341	4,395	66,025
(Gain) loss on investments	(311)	15,895	10,328
Other non-cash reconciling items, net	50,221	31,063	11,495
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(49,203)	(21,214)	(24,096)
Prepaid expenses and other current assets	(18,726)	(20,125)	4,034
Accounts payable and accrued expenses	(39,825)	(26,499)	31,523
Deferred revenue	48	16,713	(2,865)
Other current liabilities	1,516	(5,318)	(20,404)
Other non-current assets and liabilities	(24,507)	51,126	(28,716)
Net cash provided by operating activities	1,348,439	1,274,676	1,404,563
Cash flows from investing activities:
Cash paid for business acquisitions, net of cash acquired	(106,171)	(872,091)	(598,825)
Cash paid for asset acquisitions	(120,985)	0	0
Purchases of property and equipment	(457,909)	(241,266)	(328,969)
Capitalization of internal-use software development costs	(272,131)	(217,036)	(216,261)
Purchases of short-and long-term marketable securities	(1,461,890)	(17,975)	(932,604)
Proceeds from sales of short-and long-term marketable securities	201,585	575,522	442,133
Proceeds from maturities and redemptions of short-and long-term marketable securities	375,332	156,658	991,949
Other, net	(6,069)	(6,122)	(4,322)
Net cash used in investing activities	(1,848,238)	(622,310)	(646,899)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	90,000	125,000	0
Repayment of borrowings under revolving credit facility	(90,000)	(125,000)	0
Proceeds from the issuance of convertible senior notes, net of issuance costs	1,247,388	0	0
Proceeds from the issuance of warrants related to convertible senior notes	90,195	0	0
Purchases of note hedges related to convertible senior notes	(236,555)	0	0
Proceeds related to the issuance of common stock under stock plans	62,979	56,462	59,632
Employee taxes paid related to net share settlement of stock awards	(66,222)	(82,236)	(99,112)
Repurchases of common stock	(654,046)	(608,010)	(522,255)
Other, net	(360)	(393)	(268)
Net cash provided by (used in) financing activities	443,379	(634,177)	(562,003)
Effects of exchange rate changes on cash, cash equivalents and restricted cash	3,868	(12,918)	(11,376)
Net (decrease) increase in cash, cash equivalents and restricted cash	(52,552)	5,271	184,285
Cash, cash equivalents and restricted cash at beginning of year	543,022	537,751	353,466
Cash, cash equivalents and restricted cash at end of year	490,470	543,022	537,751
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net of refunds received of $11,006, $15,458 and $14,808 for the years ended December 31, 2023, 2022 and 2021, respectively	134,478	183,900	100,533
Cash paid for interest expense	6,328	6,158	5,750
Cash paid for operating lease liabilities	257,961	224,898	224,085
Non-cash activities:
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	333,590	202,409	218,753
Purchases of property and equipment and capitalization of internal-use software development costs included in accounts payable and accrued expenses	65,048	80,170	63,309
Capitalization of stock-based compensation	83,676	33,060	36,545
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	489,468	542,337	536,725
Restricted cash	1,002	685	1,026
Cash, cash equivalents and restricted cash	$ 490,470	$ 543,022	$ 537,751