Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Cash flows from operating activities:
Net Income	$ 11,984	$ 1,890
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,860	5,066
Change in deferred income tax provision	1,275	367
Stock-based compensation	3,090	1,912
Changes in assets and liabilities:
Accounts receivable, net	(16,589)	(9,037)
Inventories	(11,958)	439
Prepaid expenses and other assets	(997)	(361)
Accounts payable and accrued expenses	5,347	872
Accrued payroll obligations	(4,597)	1,976
Deferred income and allowances on sales to sell-through distributors	9,485	1,103
Net cash provided by operating activities	2,900	4,227
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	13,150	21,890
Purchase of marketable securities	(19,050)	(30,650)
Capital expenditures	(2,395)	(3,054)
Other investing activities, primarily time based software licenses	(798)	(4,194)
Net cash used in investing activities	(9,093)	(16,008)
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(1,549)	(109)
Purchase of treasury stock	0	(2,452)
Net proceeds from issuance of common stock	5,774	1,465
Net cash provided by (used in) financing activities	4,225	(1,096)
Effect of exchange rate change on cash	(176)	(165)
Net decrease in cash and cash equivalents	(2,144)	(13,042)
Beginning cash and cash equivalents	114,310	118,536
Ending cash and cash equivalents	112,166	105,494
Supplemental cash flow information:
Unrealized loss related to marketable securities, net, included in Accumulated other comprehensive income	(60)	(75)
Income taxes paid, net of refunds	380	852
Distribution of deferred compensation from trust assets	72	18
Increase in fixed assets related to asset retirement obligations	249	0
Accrued purchases of plant and equipment	$ (68)	$ 0