Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Cash flows from operating activities:
Net Income (loss)	$ 15,774	$ (22,431)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	15,173	16,162
Change in deferred income tax provision	1,886	19,307
Gain on sale or maturity of marketable securities, net	0	(393)
Stock-based compensation	6,985	5,753
Changes in assets and liabilities:
Accounts receivable, net	(6,044)	(19,027)
Inventories	1,899	(151)
Prepaid expenses and other assets	(2,177)	(351)
Accounts payable and accrued expenses (includes restructuring)	(1,354)	1,763
Accrued payroll obligations	4,957	(1,635)
Deferred income and allowances on sales to sell-through distributors	7,034	422
Net cash provided by (used in) operating activities	44,133	(581)
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	39,176	47,404
Purchase of marketable securities	(64,303)	(24,049)
Capital expenditures	(10,237)	(11,230)
Other investing activities, primarily time based software licenses	(5,939)	(4,838)
Net cash (used in) provided by investing activities	(41,303)	7,287
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(581)	(735)
Purchase of treasury stock	(2,452)	(12,360)
Net proceeds from issuance of common stock	2,642	2,970
Net cash used in financing activities	(391)	(10,125)
Effect of exchange rate change on cash	(205)	246
Net increase (decrease) in cash and cash equivalents	2,234	(3,173)
Beginning cash and cash equivalents	118,536	141,423
Ending cash and cash equivalents	120,770	138,250
Supplemental disclosures of non-cash investing and financing activities:
Unrealized (loss) gain related to marketable securities, net, included in Accumulated other comprehensive income (loss)	(11)	17
Income taxes paid, net of refunds	1,081	736
Distribution of deferred compensation from trust assets	$ 53	$ 196