Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Income Statement [Abstract]
NET REVENUES	$ 59,733		$ 61,151
COST OF REVENUES	28,653	[1]	27,975	[1]
GROSS PROFIT	31,080		33,176
OPERATING EXPENSES:
Research and development	13,771	[1]	13,324	[1]
Selling, general and administrative	11,861	[1]	11,160	[1]
Total operating expenses	25,632		24,484
INCOME FROM OPERATIONS	5,448		8,692
OTHER INCOME (EXPENSE):
Interest income	126		201
Interest expense	0		(5)
Other expense, net	(91)		0
Total other income, net	35		196
INCOME BEFORE INCOME TAXES	5,483		8,888
PROVISION FOR INCOME TAXES	238		2,981
NET INCOME	$ 5,245		$ 5,907
NET INCOME PER SHARE:
Basic (Per Share)	$ 0.09		$ 0.10
Diluted (Per Share)	$ 0.09		$ 0.10
CASH DIVIDENDS DECLARED PER SHARE	$ 0		$ 0.040
WEIGHTED AVERAGE SHARES USED IN COMPUTING PER SHARE AMOUNTS:
Basic (Shares)	58,270		60,855
Diluted (Shares)	59,030		61,639

[1] Share-based compensation expense included in:Cost of revenues$244 $284Research and development652 745Selling, general and administrative723 753