Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Cash flows from operating activities:
Net income	$ 621,483	$ 1,592,058	$ 427,374
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	52,513	36,430	40,168
Amortization of discount on available-for-sale securities	(4,103)	(20,145)	(5,277)
Gain on deferred compensation plan investments	(10,033)	(9,400)	(8,505)
Deferred taxes, net	39,694	(1,108,269)	5,865
Stock-based compensation expense	227,491	205,640	149,711
Other	(737)	28	(1,447)
Changes in operating assets and liabilities:
Accounts receivable	(83,066)	7,325	2,884
Inventories	(145,077)	(35,215)	63,583
Other assets	60,119	54,544	(24,310)
Accounts payable	41,239	23,169	4,797
Accrued compensation and related benefits	19,827	8,743	(31,187)
Income tax liabilities	1,994	13,226	(308)
Other accrued liabilities	16,858	20,276	14,865
Net cash provided by operating activities	838,202	788,410	638,213
Cash flows from investing activities:
Purchases of property and equipment	(172,013)	(146,118)	(57,578)
Purchases of intangible assets	(2,928)	(18,175)	0
Purchases of investments	(397,429)	(1,082,706)	(582,603)
Maturities and sales of investments	419,578	1,508,135	468,308
Cash paid for acquisition, net of cash acquired	0	(33,283)	0
Contributions to deferred compensation plan	(4,477)	(4,806)	(6,853)
Net cash provided by (used in) investing activities	(157,269)	223,047	(178,726)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(2,600)	(4,087)	(2,826)
Proceeds from common stock issued	9,220	8,727	8,686
Repurchases of common stock	(7,686)	(636,244)	(3,741)
Dividends and dividend equivalents paid	(284,797)	(240,623)	(185,844)
Net cash used in financing activities	(285,863)	(872,227)	(183,725)
Net increase in cash, cash equivalents and restricted cash	407,580	130,760	272,452
Cash, cash equivalents and restricted cash, beginning of period	691,941	561,181	288,729
Cash, cash equivalents and restricted cash, end of period	1,099,521	691,941	561,181
Effect of change in exchange rates	12,510	(8,470)	(3,310)
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets:
Cash and cash equivalents	1,099,302	691,816	527,843
Restricted cash included in other current assets	0	0	33,204
Restricted cash included in other long-term assets	219	125	134
Total cash, cash equivalents, and restricted cash	1,099,521	691,941	561,181
Supplemental disclosures for cash flow information:
Cash paid for income taxes, net	95,061	79,562	85,128
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	14,521	22,292	1,784
Liability accrued for dividends and dividend equivalents	$ 80,588	$ 63,409	$ 53,213