Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
Cash flows from operating activities:
Net (loss) income	$ (20,256)	$ 23,950
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	10,271	8,509
Change in deferred income tax provision	17,750	0
Gain on sale or maturity of marketable securities, net	(393)	(454)
Stock-based compensation	3,678	3,081
Changes in assets and liabilities:
Accounts receivable, net	(23,387)	(15,185)
Inventories	162	2,264
Prepaid expenses and other assets	(374)	898
Accounts payable and accrued expenses (includes restructuring)	(50)	(1,286)
Accrued payroll obligations	(2,129)	(3,361)
Deferred income and allowances on sales to sell-through distributors	1,595	889
Other liabilities	261	(78)
Net cash (used in) provided by operating activities	(12,872)	19,227
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	35,309	51,313
Purchase of marketable securities	(16,034)	(40,823)
Capital expenditures	(8,075)	(7,307)
Other investing activities, primarily time based software licenses	(2,340)	(1,560)
Net cash provided by investing activities	8,860	1,623
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(641)	(435)
Purchase of treasury stock	(6,970)	(7,977)
Net proceeds from issuance of common stock	2,668	4,213
Net cash used in financing activities	(4,943)	(4,199)
Net (decrease) increase in cash and cash equivalents	(8,955)	16,651
Beginning cash and cash equivalents	141,423	174,384
Ending cash and cash equivalents	132,468	191,035
Supplemental disclosures of non-cash investing and financing activities:
Unrealized loss related to marketable securities, net, included in Accumulated other comprehensive loss	(22)	(7)
Income taxes paid, net of refunds	382	551
Distribution of deferred compensation from trust assets	$ 131	$ 212