Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Cash flows from operating activities:
Net income	$ 906	$ 9,764
Adjustments to reconcile net income to net cash used in operating activities:
Amortization of intangibles	15,092	5,231
Depreciation	6,824	4,404
Stock-based compensation	11,094	6,663
Net loss on disposal of fixed assets	103	27
Deferred income taxes	76	(1,422)
Other non-cash adjustments, net	322	1,076
Changes in assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(16,209)	(6,529)
Inventories	(2,994)	(7,724)
Prepaid expenses and other assets	2,783	90
Accounts payable	4,780	(1,616)
Deferred revenue	788	4,595
Income taxes payable	(6,925)	(2,211)
Accrued excess facility costs	556	(3,398)
Accrued and other liabilities	(8,056)	(3,467)
Net cash provided by operating activities	9,140	5,483
Cash flows from investing activities:
Purchases of investments	(62,009)	(39,035)
Proceeds from maturities of investments	11,267	66,127
Proceeds from sales of investments	10,327
Acquisition of property and equipment	(8,502)	(13,175)
Other acquisitions	(250)
Net cash provided by (used in) investing activities	(49,167)	13,917
Cash flows from financing activities:
Proceeds from lease financing liability		12,385
Proceeds from issuance of common stock, net	13,703	3,833
Net cash provided by financing activities	13,703	16,218
Effect of exchange rate changes on cash and cash equivalents	161	(202)
Net increase (decrease) in cash and cash equivalents	(26,163)	35,416
Cash and cash equivalents at beginning of period	96,533	152,477
Cash and cash equivalents at end of period	70,370	187,893
Supplemental disclosures of cash flow information:
Income tax payments, net	$ 6,414	$ 770