Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 726,357	$ 601,602	$ 557,409
Cash flows from operating activities:
Net income	164,243	439,948	72,229
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	98,308	89,217	91,648
Amortization of debt discount and fees	25,384	23,513	29,266
Stock-based compensation	66,285	47,561	43,588
Gain on investments, net	(5,311)	(6,320)	(15,737)
Tax impact of convertible notes interest	0	0	8,486
Deferred income taxes	(2,366)	(240,424)	(7,811)
Provisions (recoveries) for losses (gains) on receivables, net	(85)	215	(6,596)
Other non-cash items	4,017	3,315	3,436
Changes in operating assets and liabilities, net of effect of acquired businesses:
Receivables	(3,609)	45,630	76,785
Inventories	(14,594)	5,245	(6,820)
Prepaid expenses and other	30,368	(12,426)	20,053
Other assets	(2,530)	(4,902)	(2,220)
Accounts payable and accrued liabilities	41,727	17,523	(46,950)
Deferred revenue	2,506	(69,662)	(13,408)
Other long-term liabilities	(36,738)	(22,439)	(5,607)
Net cash provided by operating activities	367,605	315,994	240,342
Cash flows from investing activities:
Purchases of available-for-sale securities	(111,702)	(121,154)	0
Proceeds from the sale of available-for-sale securities	77,621	18,338	9,793
Proceeds from the maturity of available-for-sale securities	38,706	4,150	0
Proceeds from the sale of long-term investments	6,234	74	9,791
Purchases of property, plant and equipment	(44,929)	(35,966)	(31,421)
Investment in venture capital partnerships and equity investments	0	(250)	(608)
Cash paid in business combinations and asset acquisitions, net of cash acquired	(392,825)	(66,432)	(44,052)
Net cash used for investing activities	(426,895)	(201,240)	(56,497)
Cash flows from financing activities:
Proceeds from revolving credit facility	100,000	0	0
Payment on revolving credit facility	(100,000)	0	0
Payment of convertible notes	(144,639)	0	(150,000)
Principal payments on receivable financing	(2,526)	(5,776)	(5,842)
Payment of debt issuance costs	0	(1,372)	0
Payment of acquisition-related contingent consideration	(677)	(39)	0
Tax effect related to employee stock transactions allocated to equity	9,034	6,061	5,549
Proceeds from issuance of common stock	42,657	32,687	19,714
Stock received for payment of employee taxes on vesting of restricted stock	(20,140)	(15,728)	(14,225)
Net cash provided by (used for) financing activities	(116,291)	15,833	(144,804)
Effect of exchange rate changes on cash and cash equivalents	(14,516)	(5,832)	5,152
Increase (decrease) in cash and cash equivalents	(190,097)	124,755	44,193
Cash and cash equivalents at end of year	536,260	726,357	601,602
Supplemental cash flow information:
Cash paid for interest	12,429	11,354	13,417
Cash paid (received) for income taxes, net	(3,084)	18,637	18,961
Non-cash investing and financing activities:
Stock options assumed in acquisitions	529	0	1,599
Available-for-sale securities received from customer	240	20	352
Receivables related to sales of cost-method investments	$ 0	$ 4,911	$ 0