Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Cash flow from operating activities:
Net income	$ 93,050	$ 34,923
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	9,175	8,736
Amortization expense	32,641	27,733
Provision for doubtful accounts	640	2,596
Deferred income taxes	(4,139)	(4,461)
Stock-based compensation	13,927	10,625
Income from equity method investments, net	(6,181)	(5,621)
Excess tax benefit for stock-based compensation	(10,950)	(1,412)
Provision for excess and obsolete inventories	4,731	3,173
Other non-cash items	2,031	(3,334)
Add decrease (increase) in assets:
Accounts receivable	(30,650)	(15,398)
Other receivables	5,988	7,647
Inventories	(16,100)	(19,747)
Other current and non-current assets	1,478	1,003
Add increase (decrease) in liabilities:
Accounts payable	8,776	17,315
Accrued compensation and benefits	(5,453)	8,142
Accrued liabilities	3,164	(21,680)
Deferred revenue	8,588	676
Income tax payable	0	44,393
Net cash provided by operating activities	110,716	95,309
Cash flow from investing activities:
Acquisitions of businesses, net of cash acquired	(91,449)	(33,605)
Acquisitions of property and equipment	(9,322)	(11,030)
Acquisitions of intangible assets	(566)	(297)
Purchases of equity method investments	(267)	(3,692)
Increase in restricted cash for business acquisition	0	(17,151)
Dividends received	7,500	5,000
Other	(357)	67
Net cash used in investing activities	(94,461)	(60,708)
Cash flow from financing activities:
Issuances of common stock, net	30,663	17,867
Repurchase and retirement of common stock	0	(60,510)
Excess tax benefit for stock-based compensation	10,950	1,412
Proceeds from long-term debt, net of debt issuance costs	144,225	0
Payments on short-term and long-term debt	(177,831)	(94)
Net cash provided by (used in) financing activities	8,007	(41,325)
Effect of exchange rate changes on cash and cash equivalents	4,761	(5,464)
Net increase (decrease) in cash and cash equivalents	29,023	(12,188)
Cash and cash equivalents, beginning of period	220,788	273,848
Cash and cash equivalents, end of period	$ 249,811	$ 261,660