Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 533,298	$ 688,087	$ 465,232
Cash flows from operating activities:
Net income	988,979	345,777	204,101
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	122,789	118,721	115,524
Amortization of debt discount and fees	1,001	1,196	1,211
Stock-based compensation	181,547	167,715	130,023
(Gain) loss on investments, net	4,090	(2,732)	(9,454)
Deferred income taxes	(576,738)	(11,676)	79,934
Provisions for losses on receivables	632	5,102	2,623
ROU asset amortization and change in operating lease liabilities	562	0	0
Other non-cash items	428	2,607	653
Changes in operating assets and liabilities, net of effect of acquired businesses:
Receivables	(4,718)	(87,083)	(31,032)
Inventories	(33,024)	752	5,034
Prepaid expenses and other	(11,031)	(19,622)	(25,793)
Other assets	(8,011)	(14,606)	(26,751)
Accounts payable and accrued liabilities	33,915	1,553	(25,987)
Deferred revenue	27,498	100,696	33,614
Other long-term liabilities	1,681	(3,649)	17,040
Net cash provided by operating activities	729,600	604,751	470,740
Cash flows from investing activities:
Proceeds from the sale of marketable investments	0	0	833
Purchases of non-marketable investments	(33,717)	(115,839)	0
Proceeds from the sale of non-marketable investments	2,952	3,497	9,108
Purchases of property, plant and equipment	(74,605)	(61,503)	(57,901)
Cash paid in business combinations and asset acquisitions, net of cash acquired	(338)	0	(143,249)
Net cash used for investing activities	(105,708)	(173,845)	(191,209)
Cash flows from financing activities:
Proceeds from revolving credit facility	150,000	100,000	135,000
Payment on revolving credit facility	(250,000)	(85,000)	(100,000)
Principal payments on term loan	0	(300,000)	0
Payment of debt issuance costs	0	0	(793)
Proceeds from issuance of common stock	52,842	40,908	48,965
Stock received for payment of employee taxes on vesting of restricted stock	(90,580)	(69,921)	(57,161)
Payments for repurchases of common stock	(306,148)	(250,059)	(100,025)
Change in book overdraft	0	(3,867)	3,867
Net cash used for financing activities	(443,886)	(567,939)	(70,147)
Effect of exchange rate changes on cash and cash equivalents	(8,094)	(17,756)	13,471
Increase (decrease) in cash and cash equivalents	171,912	(154,789)	222,855
Cash and cash equivalents at end of year	705,210	533,298	688,087
Supplemental cash flow information:
Cash paid for interest	17,842	23,018	24,160
Cash paid for income taxes, net	$ 41,946	$ 68,040	$ 59,072