SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Grant Recognition
Subsidy grant benefits recognized as a reduction of expenses	$ 3,173	$ 7,884	$ 11,256
Total liability for grant benefits subject to repayment	14,931	21,436	15,058
Cost of revenues
Grant Recognition
Subsidy grant benefits recognized as a reduction of expenses	6	18	58
Research and development
Grant Recognition
Subsidy grant benefits recognized as a reduction of expenses	$ 3,167	$ 7,866	$ 11,198