Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net Income (loss)	$ 6,930	$ (20,256)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	9,962	10,271
Change in deferred income tax provision	2,108	17,750
Gain on sale or maturity of marketable securities, net	0	(393)
Stock-based compensation	4,423	3,678
Changes in assets and liabilities:
Accounts receivable, net	(16,658)	(23,387)
Inventories	(5,460)	162
Prepaid expenses and other assets	(2,054)	(374)
Accounts payable and accrued expenses (includes restructuring)	(4,726)	(50)
Accrued payroll obligations	3,045	(2,129)
Deferred income and allowances on sales to sell-through distributors	3,337	1,595
Net cash provided by (used in) operating activities	907	(13,133)
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	36,196	35,309
Purchase of marketable securities	(46,209)	(16,034)
Capital expenditures	(6,837)	(8,075)
Other investing activities, primarily time based software licenses	(1,519)	(2,340)
Net cash (used in) provided by investing activities	(18,369)	8,860
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(431)	(641)
Purchase of treasury stock	(2,452)	(6,970)
Net proceeds from issuance of common stock	1,515	2,668
Net cash used in financing activities	(1,368)	(4,943)
Effect of exchange rate change on cash	(430)	261
Net decrease in cash and cash equivalents	(19,260)	(8,955)
Beginning cash and cash equivalents	118,536	141,423
Ending cash and cash equivalents	99,276	132,468
Supplemental disclosures of non-cash investing and financing activities:
Unrealized gain (loss) related to marketable securities, net, included in Accumulated other comprehensive income (loss)	70	(22)
Income taxes paid, net of refunds	956	382
Distribution of deferred compensation from trust assets	$ 35	$ 131