Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities:
Net income	$ 445,791	$ 337,337
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	38,270	26,387
Amortization of discount on available-for-sale securities	(3,894)	(16,684)
Gain on deferred compensation plan investments	(8,023)	(9,180)
Deferred taxes, net	26,736	(6,598)
Stock-based compensation expense	173,581	149,630
Other	(390)	50
Changes in operating assets and liabilities:
Accounts receivable	(69,033)	15,148
Inventories	(86,057)	(40,535)
Other assets	73,172	57,781
Accounts payable	33,901	44,210
Accrued compensation and related benefits	33,866	24,450
Income tax liabilities	53,684	13,345
Other accrued liabilities	21,688	25,388
Net cash provided by operating activities	733,292	620,729
Cash flows from investing activities:
Purchases of property and equipment	(131,000)	(81,316)
Purchases of intangible assets	(2,528)	(18,175)
Purchases of investments	(395,533)	(941,451)
Maturities and sales of investments	384,640	779,861
Cash paid for acquisition, net of cash acquired	0	(33,283)
Contributions to deferred compensation plan	(1,297)	(1,764)
Net cash used in investing activities	(145,718)	(296,128)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(2,106)	(2,654)
Proceeds from common stock issued under the employee stock purchase plan	9,220	8,727
Repurchases of common stock	(5,703)	(14,160)
Dividends and dividend equivalents paid	(209,978)	(178,766)
Net cash used in financing activities	(208,567)	(186,853)
Effect of change in exchange rates	10,445	1,552
Net increase in cash, cash equivalents and restricted cash	389,452	139,300
Cash, cash equivalents and restricted cash, beginning of period	691,941	561,181
Cash, cash equivalents and restricted cash, end of period	1,081,393	700,481
Supplemental disclosures for cash flow information:
Cash paid for income taxes, net	21,968	58,614
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	11,701	9,577
Liability accrued for dividends and dividend equivalents	$ 78,407	$ 63,922