CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
NET REVENUES	$ 76,382		$ 80,184		$ 148,155		$ 156,946
COST OF REVENUES	38,627		42,558		75,807		82,897
GROSS PROFIT	37,755		37,626		72,348		74,049
OPERATING EXPENSES:
Research and development	12,066		10,195		22,706		20,218
Sales and marketing	9,176		8,104		17,315		16,352
General and administrative	7,100		6,141		14,193		12,616
Total operating expenses	28,342		24,440		54,214		49,186
INCOME FROM OPERATIONS	9,413		13,186		18,134		24,863
OTHER INCOME
Other income, net	195		461		810		903
Total other income	195		461		810		903
INCOME BEFORE PROVISION FOR INCOME TAXES	9,608		13,647		18,944		25,766
PROVISION FOR INCOME TAXES	16,784		3,048		18,659		5,313
NET INCOME (LOSS)	$ (7,176)		$ 10,599		$ 285		$ 20,453
EARNINGS (LOSS) PER SHARE:
Basic	$ (0.25)		$ 0.37		$ 0.01		$ 0.71
Diluted	$ (0.25)	[1]	$ 0.35	[1]	$ 0.01	[1]	$ 0.68	[1]
SHARES USED IN PER SHARE CALCULATION:
Basic	28,619		28,938		28,423		28,784
Diluted	28,619	[1]	30,346	[1]	29,624	[1]	30,271	[1]

[1] The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share when they become contingently issuable per ASC 260-10, Earnings per Share and excludes such shares when they are not contingently issuable. The Company has excluded all performance-based awards underlying the fiscal 2012 and 2011 awards as those shares were not contingently issuable as of the end of the periods reported.