Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Income
Net sales	$ 516,020	$ 979,135	$ 930,892
Cost of sales	300,887	504,801	481,407
Gross profit	215,133	474,334	449,485
Operating expenses (income):
Selling, general and administrative	73,110	95,134	87,250
Research and development	95,153	96,596	56,948
Amortization	4,908	4,734	3,703
Restructuring	3,813	1,288	(179)
Asset impairment	1,335	584
Other, net	(398)	(261)	(1,490)
Total operating expenses	177,921	198,075	146,232
Operating income	37,212	276,259	303,253
Interest income	2,476	3,776	1,629
Interest expense	(1,502)	(4,600)	(8,201)
Interest income (expense), net	974	(824)	(6,572)
Loss on extinguishment of debt		(3,349)
Income from continuing operations before income taxes	38,186	272,086	296,681
Income tax provision	11,657	81,584	19,505
Income from continuing operations	26,529	190,502	277,176
Discontinued operations:
Income (loss) from discontinued operations before income taxes	6,269	(91,885)	129,776
Income tax provision (benefit)	1,870	(29,370)	45,192
Income (loss) from discontinued operations	4,399	(62,515)	84,584
Net income	$ 30,928	$ 127,987	$ 361,760
Basic:
Continuing operations (in dollars per share)	$ 0.69	$ 4.80	$ 7.02
Discontinued operations (in dollars per share)	$ 0.11	$ (1.57)	$ 2.14
Income (in dollars per share)	$ 0.80	$ 3.23	$ 9.16
Diluted :
Continuing operations (in dollars per share)	$ 0.68	$ 4.63	$ 6.52
Discontinued operations (in dollars per share)	$ 0.11	$ (1.52)	$ 1.99
Income (in dollars per share)	$ 0.79	$ 3.11	$ 8.51
Weighted average shares outstanding:
Basic (in shares)	38,477	39,658	39,499
Diluted (in shares)	39,051	41,155	42,514