Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2012	Jul. 01, 2011
Cash flows from operating activities:
Net income (loss)	$ (7,511)	$ 906
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization of intangibles	14,777	15,092
Depreciation	7,519	6,824
Stock-based compensation	9,502	11,094
Net loss on disposal of fixed assets	88	103
Deferred income taxes	1,330	76
Provision for inventories	(2,261)	4,126
Allowance for doubtful accounts, returns and discounts	1,152	53
Other non-cash adjustments, net	310	322
Changes in assets and liabilities, net of effect of acquisitions:
Accounts receivable	5,990	(16,262)
Inventories	4,903	(7,120)
Prepaid expenses and other assets	(3,184)	2,783
Accounts payable	(684)	4,780
Deferred revenue	4,448	788
Income taxes payable	(2,560)	(6,925)
Accrued and other liabilities	(5,605)	(7,500)
Net cash provided by operating activities	28,214	9,140
Cash flows from investing activities:
Purchases of investments	(57,661)	(62,009)
Proceeds from maturities of investments	26,110	11,267
Proceeds from sales of investments	16,483	10,327
Acquisition of property and equipment	(6,708)	(8,502)
Other acquisitions		(250)
Net cash used in investing activities	(21,776)	(49,167)
Cash flows from financing activities:
Payments for repurchase of common stock	(6,953)
Proceeds from issuance of common stock, net	2,016	13,703
Net cash provided by (used in) financing activities	(4,937)	13,703
Effect of exchange rate changes on cash and cash equivalents	(38)	161
Net increase (decrease) in cash and cash equivalents	1,463	(26,163)
Cash and cash equivalents at beginning of period	90,983	96,533
Cash and cash equivalents at end of period	$ 92,446	$ 70,370