Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013
Cash flows from operating activities:
Net Income	$ 23,755	$ 6,930
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,633	9,962
Change in deferred income tax provision	2,824	2,108
Gain on sale of auction rate securities	(1,698)	0
Stock-based compensation	6,410	4,423
Changes in assets and liabilities:
Accounts receivable, net	(16,204)	(16,658)
Inventories	(13,048)	(5,460)
Prepaid expenses and other assets	(1,632)	(2,054)
Accounts payable and accrued expenses	(962)	(4,726)
Accrued payroll obligations	(3,159)	3,045
Deferred income and allowances on sales to sell-through distributors	16,136	3,337
Net cash provided by operating activities	24,055	907
Cash flows from investing activities:
Proceeds from sales or maturities of short-term marketable securities	45,836	36,196
Proceeds from sales of auction rate securities	5,488	0
Purchase of marketable securities	(53,366)	(46,209)
Capital expenditures	(4,875)	(6,837)
Other investing activities, primarily time based software licenses	(1,359)	(1,519)
Net cash used in investing activities	(8,276)	(18,369)
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(2,334)	(431)
Purchase of treasury stock	0	(2,452)
Net proceeds from issuance of common stock	9,419	1,515
Net cash provided by (used in) financing activities	7,085	(1,368)
Effect of exchange rate change on cash	802	(430)
Net increase (decrease) in cash and cash equivalents	23,666	(19,260)
Beginning cash and cash equivalents	114,310	118,536
Ending cash and cash equivalents	137,976	99,276
Supplemental cash flow information:
Unrealized loss related to marketable securities, net, included in Accumulated other comprehensive income	29	70
Income taxes paid, net of refunds	798	956
Increase in fixed assets related to asset retirement obligations	249	0
Accrued purchases of plant and equipment	$ 58	$ (528)