INCOME TAXES (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2009 Subsidiary
INCOME TAXES
Number of foreign subsidiaries of which shares were sold		1
Tax benefit realized from stock options exercised	$ 2,700,000
Amount of Indefinite re-investment with respect to the earnings and profits of its other foreign subsidiaries	297,200,000
Federal | R&D credits
Tax attribute carryforwards
Tax credits carry forwards, net of those related to stock option deductions	4,971,000
Tax credits carry forwards related to stock option deductions	28,249,000
Foreign
Tax attribute carryforwards
Net operating loss carry forwards	129,095,000
Tax credits carry forwards	50,882,000
Foreign | R&D credits
Tax attribute carryforwards
Tax credits carry forwards	21,274,000
State
Tax attribute carryforwards
Net operating loss carry forwards	549,694,000
State | R&D credits
Tax attribute carryforwards
Tax credits carry forwards	11,837,000
State | Investment tax credits
Tax attribute carryforwards
Tax credits carry forwards	$ 11,644,000