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Condensed Consolidated Statements Of Operations (Parenthetical) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Share-based compensation	$ 2,248	$ 2,777	$ 6,684	$ 8,767
Cost Of Revenues [Member]
Share-based compensation	246	304	736	963
Sales And Marketing [Member]
Share-based compensation	350	464	1,049	1,460
Research, Development And Engineering [Member]
Share-based compensation	110	204	367	645
General And Administrative [Member]
Share-based compensation	$ 1,542	$ 1,805	$ 4,532	$ 5,699

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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