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REPURCHASE OF ORDINARY SHARES (Details) (USD $)
 12 Months Ended 0 Months Ended 17 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 17 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Aug. 12, 2011
Repurchase program, August 2011
Dec. 31, 2012
Repurchase program, August 2011
Nov. 30, 2012
Tender offer repurchase program
Jan. 10, 2013
Tender offer repurchase program
Dec. 31, 2012
Tender offer repurchase program
Jan. 10, 2013
Tender offer repurchase program
Subsequent Events
Aug. 12, 2011
Parent
Repurchase program, August 2011
Dec. 31, 2012
Parent
Repurchase program, August 2011
Jan. 10, 2013
Parent
Tender offer repurchase program
Nov. 30, 2012
Parent
Tender offer repurchase program
Jan. 10, 2013
Parent
Tender offer repurchase program
Dec. 31, 2012
Parent
Tender offer repurchase program
Jan. 10, 2013
Parent
Tender offer repurchase program
Subsequent Events
REPURCHASE OF ORDINARY SHARES                              
Repurchase of ordinary shares authorized amount     $ 20,000,000           $ 20,000,000            
Shares repurchased under program       12,524,614           12,524,614          
Shares repurchased after reverse share split under program                   4,174,871          
Period for repurchase of ordinary shares     12 months           12 months            
Ordinary shares authorized to be repurchased under a tender offer         25,000,000             25,000,000      
Share price (in dollars per share)         $ 1.2             $ 1.20      
Ordinary shares repurchased           25,000,000   25,000,000         25,000,000    
Repurchase of ordinary share $ 8,842,000 $ 6,301,000   $ 15,100,000   $ 30,000,000   $ 30,000,000   $ 15,100,000 $ 30,000,000        
Ordinary shares after reverse share split authorized to be repurchased under a tender offer         8,333,333                 8,333,333  
Share price after reverse share split (in dollars per share)         $ 3.60                 $ 3.60  
Ordinary shares after reverse share split             8,333,333 8,333,333             8,333,333