Consolidated Statements of Operations and Comprehensive (Loss) Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Revenue	$ 279,256	$ 318,366	$ 297,768
Costs and expenses:
Cost of products sold	128,499	129,769	117,943
Research and development	77,610	71,855	60,326
Selling, general and administrative	72,317	68,838	64,359
Acquisition related charges, including amortization of intangible assets	4,178	536	0
Restructuring charges	6,018	6,079	11
Costs and expenses	288,622	277,077	242,639
(Loss) income from operations	(9,366)	41,289	55,129
Other income, net	505	1,434	2,474
(Loss) income before income taxes	(8,861)	42,723	57,603
(Provision) benefit for income taxes	(20,745)	35,509	(531)
Net (loss) income	(29,606)	78,232	57,072
Net (loss) income per share:
Basic (in dollars per share)	$ (0.25)	$ 0.66	$ 0.49
Diluted (in dollars per share)	$ (0.25)	$ 0.65	$ 0.48
Shares used in per share calculations:
Basic (in shares)	117,194	117,875	116,726
Diluted (in shares)	117,194	121,139	120,143
Comprehensive (loss) income
Net (loss) income	(29,606)	78,232	57,072
Other comprehensive income:
Unrealized (loss) gain related to marketable securities, net	(57)	(526)	581
Recognized gain on redemption of marketable securities, previously unrealized	(78)	(133)	0
Tax effect of change in fair market value of auction rate securities	0	0	(304)
Translation adjustment	219	(185)	64
Comprehensive (loss) income	$ (29,522)	$ 77,388	$ 57,413