Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 192,907	$ 209,306
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,942	19,940
Amortization of premium (discount) on available-for-sale securities	(10,040)	56
Gain on deferred compensation plan investments	(5,285)	(5,022)
Gain on sale of equity investments	0	(1,424)
Deferred taxes, net	(5,821)	(984)
Stock-based compensation expense	98,232	75,001
Other	77	0
Changes in operating assets and liabilities:
Accounts receivable	21,951	13,544
Inventories	(42,350)	19,847
Other assets	60,590	(4,881)
Accounts payable	30,725	12,653
Accrued compensation and related benefits	8,353	(20,613)
Income tax liabilities	7,459	(14,802)
Other accrued liabilities	15,286	6,371
Net cash provided by operating activities	389,026	308,992
Cash flows from investing activities:
Purchases of property and equipment	(47,498)	(16,681)
Cash paid for an assumed lease	(18,175)	0
Purchases of investments	(589,615)	(211,407)
Maturities and sales of investments	420,514	232,206
Cash paid for acquisition, net of cash acquired	(33,283)	0
Contributions to deferred compensation plan, net	(1,309)	(3,855)
Net cash provided by (used in) investing activities	(269,366)	263
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(2,010)	(1,192)
Proceeds from common stock issued under the employee equity incentive plan	0	1,114
Proceeds from common stock issued under the employee stock purchase plan	4,606	3,737
Repurchases of common stock	(8,626)	0
Dividends and dividend equivalents paid	(117,608)	(85,863)
Net cash used in financing activities	(123,638)	(82,204)
Effect of change in exchange rates	(6,603)	(8,696)
Net increase (decrease) in cash, cash equivalents and restricted cash	(10,581)	218,355
Cash, cash equivalents and restricted cash, beginning of period	561,181	288,729
Cash, cash equivalents and restricted cash, end of period	550,600	507,084
Supplemental disclosures for cash flow information:
Cash paid for income taxes, net	34,064	58,216
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	7,488	2,586
Liability accrued for dividends and dividend equivalents	$ 62,949	$ 51,037