Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Operations [Abstract]
SALES	$ 138,154	$ 100,107	$ 275,806	$ 169,794
COST OF SALES	82,777	55,548	158,384	96,028
GROSS PROFIT	55,377	44,559	117,422	73,766
OPERATING EXPENSES:
Research and development	17,137	13,515	32,999	24,657
Selling, general and administrative	20,001	17,183	40,906	29,412
Amortization of intangible assets	921	767	1,842	767
Total operating expenses	38,059	31,465	75,747	54,836
OPERATING INCOME	17,318	13,094	41,675	18,930
OTHER INCOME, NET	92	220	755	605
Income from continuing operations before income taxes	17,410	13,314	42,430	19,535
Provision for income taxes	3,898	1,857	10,152	3,228
INCOME FROM CONTINUING OPERATIONS, NET OF INCOME TAXES	13,512	11,457	32,278	16,307
Income from discontinued operations, net of income taxes	74	2,162	214	3,529
NET INCOME	$ 13,586	$ 13,619	$ 32,492	$ 19,836
Basic weighted-average common shares outstanding	43,571	42,806	43,505	42,440
Diluted weighted-average common shares outstanding	44,187	43,327	44,156	43,004
CONTINUING OPERATIONS:
BASIC EARNINGS PER SHARE	$ 0.31	$ 0.27	$ 0.74	$ 0.38
DILUTED EARNINGS PER SHARE	$ 0.31	$ 0.26	$ 0.73	$ 0.38
DISCONTINUED OPERATIONS:
BASIC EARNINGS PER SHARE	$ 0.00	$ 0.05	$ 0.00	$ 0.08
DILUTED EARNINGS PER SHARE	$ 0.00	$ 0.05	$ 0.00	$ 0.08
NET INCOME:
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DILUTED EARNINGS PER SHARE	$ 0.31	$ 0.31	$ 0.74	$ 0.46

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