Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Cash flows from operating activities:
Net (loss) income	$ (7,714)	$ 10,919
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	5,027	4,083
Change in deferred income tax provision	7,520
Gain on sale or maturity of marketable securities, net		(590)
Stock-based compensation	1,624	1,344
Changes in assets and liabilities:
Accounts receivable, net	(15,820)	(8,716)
Inventories	433	(736)
Prepaid expenses and other assets	(3,367)	(487)
Accounts payable and accrued expenses (includes restructuring)	978	598
Accrued payroll obligations	(1,999)	(3,394)
Deferred income and allowances on sales to sell-through distributors	3,220	233
Other liabilities	155	71
Net cash (used in) provided by operating activities	(9,943)	3,325
Cash flows from investing activities:
Proceeds from sales or maturities of marketable securities	15,018	27,910
Purchase of marketable securities	(6,024)	(13,984)
Capital expenditures	(3,442)	(4,065)
Other investing activities, primarily time based software licenses	(1,082)	(2,303)
Net cash provided by investing activities	4,470	7,558
Cash flows from financing activities:
Net share settlement upon issuance of RSUs	(376)	(223)
Purchase of treasury stock	(1,558)	(4,330)
Net proceeds from issuance of common stock	2,491	1,736
Net cash provided by (used in) financing activities	557	(2,817)
Net (decrease) increase in cash and cash equivalents	(4,916)	8,066
Beginning cash and cash equivalents	141,423	174,384
Ending cash and cash equivalents	136,507	182,450
Supplemental disclosures of non-cash investing and financing activities:
Unrealized (loss) gain related to marketable securities, net, included in Accumulated other comprehensive income	(65)	9
Income taxes paid, net of refunds	329	438
Distribution of deferred compensation from trust assets	$ 65	$ 108