Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidated Statements of Operations
Net sales	$ 61,781	$ 139,909
Cost of sales	39,229	74,641
Gross profit	22,552	65,268
Operating expenses (income):
Selling, general and administrative	19,648	19,773
Research and development	20,737	23,306
Amortization	856	1,215
Restructuring	531	63
Other, net	404	(35)
Total operating expenses	42,176	44,322
Operating (loss) income	(19,624)	20,946
Interest income, net	192	203
(Loss) income from continuing operations before income taxes	(19,432)	21,149
Income tax (benefit) provision	(9,361)	4,687
(Loss) income from continuing operations	(10,071)	16,462
Discontinued operations:
Loss from discontinued operations before income taxes		(81)
Income tax benefit		(31)
Loss from discontinued operations		(50)
Net (loss) income	$ (10,071)	$ 16,412
Basic:
Continuing operations (in dollars per share)	$ (0.26)	$ 0.43
Discontinued operations (in dollars per share)	$ 0.00
(Loss) income (in dollars per share)	$ (0.26)	$ 0.43
Diluted :
Continuing operations (in dollars per share)	$ (0.26)	$ 0.42
Discontinued operations (in dollars per share)	$ 0.00
(Loss) income (in dollars per share)	$ (0.26)	$ 0.42
Weighted average shares outstanding:
Basic (in shares)	38,716	38,261
Diluted (in shares)	38,716	38,863