Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 571,358	$ 377,254
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other	28,012	25,235
Stock-based compensation	100,503	82,497
Noncash lease expense	9,161	8,410
Deferred income taxes	(105,937)	(2,998)
Unrealized gain on equity investments	(23,413)	0
Amortization of investment premiums	11,457	12,121
Changes in operating assets and liabilities:
Accounts receivable, net	(64,335)	25,326
Inventories	(202,052)	(63,531)
Prepaid expenses and other current assets	(158,149)	(44,356)
Other assets	(5,543)	(3,390)
Accounts payable	71,169	10,879
Accrued liabilities	(16,210)	20,025
Deferred revenue	91,201	95,263
Income taxes payable	10,792	(9,144)
Other liabilities	221	(15,550)
Net cash provided by operating activities	318,235	518,041
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities of marketable securities	829,714	819,807
Purchases of marketable securities	(641,979)	(1,241,657)
Purchases of property and equipment	(23,744)	(9,567)
Business acquisitions, net of cash acquired	(145,087)	1,419
Investments in privately-held companies and intangibles	(11,691)	(6,084)
Proceeds from sale of marketable securities	165,746	0
Net cash provided by (used in) investing activities	172,959	(436,082)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock under equity plans	22,991	26,884
Tax withholding paid on behalf of employees for net share settlement	(18,802)	(6,353)
Repurchase of common stock	(619,888)	(101,355)
Net cash used in financing activities	(615,699)	(80,824)
Effect of exchange rate changes	(3,041)	(665)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(127,546)	470
CASH, CASH EQUIVALENTS AND RESTRICTED CASH —Beginning of period	625,050	897,454
CASH, CASH EQUIVALENTS AND RESTRICTED CASH —End of period	497,504	897,924
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION:
Right-of-use assets obtained in exchange for new operating lease liabilities	6,022	1,619
Property and equipment included in accounts payable and accrued liabilities	4,520	1,732
Common stock issued for business acquisition	$ 4,049	$ 0