CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
NET REVENUES	$ 71,773		$ 76,762
COST OF REVENUES	37,181		40,339
GROSS PROFIT	34,592		36,423
OPERATING EXPENSES:
Research and development	10,640		10,023
Sales and marketing	8,139		8,248
General and administrative	7,092		6,475
Total operating expenses	25,871		24,746
INCOME FROM OPERATIONS	8,721		11,677
OTHER INCOME
Other income, net	615		442
Total other income	615		442
INCOME BEFORE PROVISION FOR INCOME TAXES	9,336		12,119
PROVISION FOR INCOME TAXES	1,875		2,265
NET INCOME	$ 7,461		$ 9,854
EARNINGS PER SHARE:
Basic	$ 0.26		$ 0.34
Diluted	$ 0.25	[1]	$ 0.33	[1]
SHARES USED IN PER SHARE CALCULATION:
Basic	28,227		28,628
Diluted	29,435	[1]	30,187	[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 period.