Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Cash flows from operating activities:
Net income	$ 148,909	$ 103,613	$ 63,963
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	20,509	18,198	18,795
Amortization expense	85,160	57,639	52,672
Provision for doubtful accounts	1,913	2,320	4,139
Deferred income taxes	(26,305)	(14,918)	(7,473)
Stock-based compensation	28,451	23,125	18,659
Income from equity method investments	(15,349)	(11,795)	(429)
Excess tax benefit for stock-based compensation	(14,762)	(9,639)	(1,453)
Provision for excess and obsolete inventories	8,410	4,752	3,530
Other non-cash items	2,885	(4,610)	(2,810)
Add decrease (increase) in assets:
Accounts receivable	(31,874)	(7,376)	(3,935)
Other receivables	30,141	2,518	3,516
Inventories	(30,139)	(45,549)	13,292
Other current and non-current assets	10,519	2,257	(620)
Add increase (decrease) in liabilities:
Accounts payable	(4,310)	13,577	2,631
Accrued compensation and benefits	2,469	15,928	245
Deferred revenue	18,775	(1,177)	25,476
Accrued warranty expense	644	(2,217)	1,179
Accrued liabilities	5,583	(22,616)	3,254
Net cash provided by operating activities	241,629	124,030	194,631
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(759,737)	(136,419)	(52,018)
Acquisitions of property and equipment	(23,278)	(23,133)	(12,706)
Acquisitions of intangible assets	(1,666)	(2,063)	(26,839)
Purchases of equity method investments	(3,267)	(8,192)	(750)
Proceeds received from noncontrolling interest holder		7,470
Net maturities of short term investments			5,000
Dividends received	12,398	5,858	2,896
Other	1,985	105	491
Net cash used in investing activities	(773,565)	(156,374)	(83,926)
Cash flows from financing activities:
Issuance of common stock, net	45,869	44,548	14,855
Repurchase and retirement of common stock		(73,853)
Proceeds from long-term debt and revolving credit lines	734,225
Excess tax benefit for stock-based compensation	14,762	9,639	1,453
Payments on short-term and long-term debt	(330,689)	(498)	(183)
Net cash provided by (used in) financing activities	464,167	(20,164)	16,125
Effect of exchange rate changes on cash and cash equivalents	1,602	(552)	4,487
Net increase (decrease) in cash and cash equivalents	(66,167)	(53,060)	131,317
Cash and cash equivalents, beginning of fiscal year	220,788	273,848	142,531
Cash and cash equivalents, end of fiscal year	$ 154,621	$ 220,788	$ 273,848