Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011
Statement of Cash Flows [Abstract]
Cash and Cash Equivalents at Beginning of Period	$ 601,602	$ 557,409
Cash Flows from Operating Activities:
Net income	126,074	61,337
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	67,171	68,934
Amortization of debt discount and fees	17,480	22,068
Stock-based compensation	34,285	31,589
Gain on investments, net	(2,222)	(19,220)
Non-cash restructuring and other charges	188	202
Deferred income taxes	(14,107)	(4,741)
Provisions (recoveries) for losses (gains) on receivables, net	120	(6,596)
Other non-cash items	3,270	3,689
Changes in operating assets and liabilities, net of effect of acquired businesses:
Receivables	24,276	63,729
Inventories	6,936	(9,767)
Prepaid expenses and other	1,547	19,718
Other assets	(3,101)	3,718
Accounts payable and accrued liabilities	(1,714)	(71,832)
Deferred revenue	(38,230)	20,245
Other long-term liabilities	(1,855)	(4,868)
Net cash provided by operating activities	220,118	178,205
Cash Flows from Investing Activities:
Proceeds from the sale and maturity of available-for-sale securities	7,436	9,588
Purchases of available-for-sale securities	(101,248)	0
Proceeds from the sale of long-term investments	44	4,824
Purchases of property, plant and equipment	(25,932)	(17,703)
Investment in venture capital partnerships and equity investments	(250)	(608)
Cash paid in business combinations and asset acquisitions, net of cash acquired	(66,432)	(44,052)
Net cash used for investing activities	(186,382)	(47,951)
Cash Flows from Financing Activities:
Principal payments on receivable sale financing	(2,907)	(2,829)
Tax effect related to employee stock transactions allocated to equity	5,790	2,897
Payment of acquisition-related contingent consideration	(39)	0
Proceeds from issuance of common stock	28,755	16,994
Stock received for payment of employee taxes on vesting of restricted stock	(13,457)	(9,926)
Net cash provided by financing activities	18,142	7,136
Effect of exchange rate changes on cash and cash equivalents	(4,381)	1,302
Increase in cash and cash equivalents	47,497	138,692
Cash and Cash Equivalents at End of Period	$ 649,099	$ 696,101