Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011
Cash flows from operating activities:
Net (loss) income	$ (22,431)	$ 37,287
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	16,162	12,598
Change in deferred income tax provision	19,307	0
Gain on sale or maturity of marketable securities, net	(393)	(385)
Stock-based compensation	5,753	4,768
Changes in assets and liabilities:
Accounts receivable, net	(19,027)	(12,294)
Inventories	(151)	2,212
Prepaid expenses and other assets	(351)	(524)
Accounts payable and accrued expenses (includes restructuring)	1,763	911
Accrued payroll obligations	(1,635)	(1,389)
Deferred income and allowances on sales to sell-through distributors	422	3,389
Other liabilities	246	(834)
Net cash (used in) provided by operating activities	(335)	45,739
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	47,404	74,312
Purchase of marketable securities	(24,049)	(69,706)
Capital expenditures	(11,230)	(8,690)
Payments to Acquire Businesses, Net of Cash Acquired	0	(897)
Other investing activities, primarily time based software licenses	(4,838)	(1,620)
Net cash provided by (used in) investing activities	7,287	(6,601)
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(735)	(597)
Purchase of treasury stock	(12,360)	(12,789)
Net proceeds from issuance of common stock	2,970	4,784
Net cash used in financing activities	(10,125)	(8,602)
Net (decrease) increase in cash and cash equivalents	(3,173)	30,536
Beginning cash and cash equivalents	141,423	174,384
Ending cash and cash equivalents	138,250	204,920
Supplemental disclosures of non-cash investing and financing activites:
Unrealized loss related to marketable securities, net, included in Accumulated other comprehensive loss	17	(8)
Income taxes paid, net of refunds	736	1,724
Distribution of deferred compensation from trust assets	$ 196	$ 277