Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012
Cash flow from operating activities:
Net income	$ 158,505	$ 157,037
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	19,630	16,910
Amortization expense	120,713	89,315
Provision for doubtful accounts	1,204	1,428
Deferred income taxes	(13,520)	646
Stock-based compensation	26,158	23,628
Income from equity method investments	(15,908)	(19,708)
Excess tax benefit for stock-based compensation	(8,803)	(16,673)
Provision for excess and obsolete inventories	1,551	6,372
Other non-cash items	738	(3,019)
Add decrease (increase) in assets:
Accounts receivable	(28,466)	(39,496)
Other receivables	4,047	(7,996)
Inventories	2,645	(4,650)
Other current and non-current assets	(22,765)	(2,844)
Add increase (decrease) in liabilities:
Accounts payable	(22,467)	7,828
Accrued compensation and benefits	(2,738)	6,375
Deferred revenue	46,891	12,390
Accrued warranty expense	347	(2,491)
Other current and non-current liabilities	10,646	18,842
Net cash provided by operating activities	278,408	243,894
Cash flow from investing activities:
Acquisitions of businesses, net of cash acquired	(200,401)	(355,484)
Acquisitions of property and equipment	(57,646)	(34,126)
Dividends received from equity method investments	7,672	2,140
Increase in Restricted Cash	(6,696)	0
Other	663	(492)
Net cash used in investing activities	(256,408)	(387,962)
Cash flow from financing activities:
Issuances of common stock, net of tax withholding	37,667	37,142
Excess tax benefit for stock-based compensation	8,803	16,673
Proceeds from debt and revolving credit lines	332,021	478,556
Payments on debt and revolving credit lines	(440,886)	(401,062)
Net cash provided by (used in) financing activities	(62,395)	131,309
Effect of exchange rate changes on cash and cash equivalents	(2,119)	(22)
Net decrease in cash and cash equivalents	(42,514)	(12,781)
Cash and cash equivalents, beginning of period	157,771	154,621
Cash and cash equivalents, end of period	$ 115,257	$ 141,840