Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net income	$ 133,791	$ 92,541
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,449	8,251
Amortization of discount on available-for-sale securities	(768)	(4,123)
Loss (gain) on deferred compensation plan investments	1,350	(4,019)
Deferred taxes, net	8,431	248
Stock-based compensation expense	52,806	45,926
Other	20	(63)
Changes in operating assets and liabilities:
Accounts receivable	(42,338)	(14,578)
Inventories	(35,180)	(11,596)
Other assets	78,005	74,477
Accounts payable	21,296	35,934
Accrued compensation and related benefits	10,609	14,698
Income tax liabilities	21,471	3,011
Other accrued liabilities	(4,555)	7,344
Net cash provided by operating activities	256,387	248,051
Cash flows from investing activities:
Purchases of property and equipment	(40,342)	(15,991)
Purchases of investments	(357,633)	(365,856)
Maturities and sales of investments	141,065	149,766
Cash paid for acquisition, net of cash acquired	0	(33,284)
Contributions to deferred compensation plan	(575)	(650)
Net cash used in investing activities	(257,485)	(266,015)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(1,243)	(978)
Proceeds from common stock issued under the employee stock purchase plan	5,335	4,606
Repurchases of common stock	0	(4,076)
Dividends and dividend equivalents paid	(60,008)	(49,553)
Net cash used in financing activities	(55,916)	(50,001)
Effect of change in exchange rates	2,555	(4,818)
Net decrease in cash, cash equivalents and restricted cash	(54,459)	(72,783)
Cash, cash equivalents and restricted cash, beginning of period	691,941	561,181
Cash, cash equivalents and restricted cash, end of period	637,482	488,398
Supplemental disclosures for cash flow information:
Cash paid (refunded) for income taxes, net	(218)	725
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	14,611	5,995
Liability accrued for dividends and dividend equivalents	$ 75,939	$ 61,892