Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 437,672	$ 242,023	$ 164,375
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	37,114	28,699	19,186
Amortization of premium on available-for-sale securities	4,375	4,674	2,979
Loss (gain) on deferred compensation plan investments	6,600	(4,563)	(4,592)
Deferred taxes, net	(13,220)	(2,772)	(1,627)
Stock-based compensation expense	160,992	123,479	85,551
Other	97	110	(1,072)
Changes in operating assets and liabilities:
Accounts receivable	(77,903)	(37,976)	(14,123)
Inventories	(188,073)	(102,323)	(29,503)
Other assets	(177,284)	(15,311)	(3,003)
Accounts payable	(11,240)	32,926	10,410
Accrued compensation and related benefits	28,514	16,536	18,524
Income tax liabilities	16,559	11,771	747
Other accrued liabilities	22,471	22,737	19,951
Net cash provided by operating activities	246,674	320,010	267,803
Cash flows from investing activities:
Purchases of property and equipment	(58,843)	(94,420)	(55,610)
Purchases of short-term investments	(63,700)	(394,886)	(334,947)
Maturities and sales of short-term investments	127,860	113,255	357,092
Purchases of long-term investments	(2,085)	0	(3,316)
Sales of long-term investments	750	500	300
Contributions to deferred compensation plan, net	(16,492)	(2,542)	(2,696)
Purchases of intangible assets	0	(793)	0
Net cash used in investing activities	(12,510)	(378,886)	(39,177)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(2,055)	(2,834)	(5,357)
Proceeds from common stock issued under the employee equity incentive plan	5,358	17,322	18,767
Proceeds from common stock issued under the employee stock purchase plan	5,877	4,670	3,819
Dividends and dividend equivalents paid	(137,965)	(109,364)	(88,786)
Net cash used in financing activities	(128,785)	(90,206)	(71,557)
Effect of change in exchange rates	(6,039)	3,400	4,926
Net increase (decrease) in cash, cash equivalents and restricted cash	99,340	(145,682)	161,995
Cash, cash equivalents and restricted cash, beginning of period	189,389	335,071	173,076
Cash, cash equivalents and restricted cash, end of period	288,729	189,389	335,071
Supplemental disclosures for cash flow information:
Cash paid for taxes	85,031	21,148	1,405
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	5,743	17,877	7,839
Liability accrued for dividends and dividend equivalents	$ 40,939	$ 33,059	$ 27,507