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STOCKHOLDERS' EQUITY (Details) (USD $)
 9 Months Ended 150 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 9 Months Ended 12 Months Ended 185 Months Ended 194 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Jan. 31, 2009
Dec. 31, 2011
Dec. 31, 2010
Sep. 30, 2012
Year from November 1, 2011 to October 31, 2012
Dec. 31, 2011
Year from November 1, 2011 to October 31, 2012
Sep. 30, 2012
Year from November 1, 2012 to October 31, 2013
Dec. 31, 2011
Year from November 1, 2012 to October 31, 2013
Sep. 30, 2012
Year from November 1, 2013 to October 31, 2014
Dec. 31, 2011
Year from November 1, 2013 to October 31, 2014
Sep. 30, 2012
November 1, 2014 and thereafter
Dec. 31, 2011
November 1, 2014 and thereafter
Sep. 30, 2012
Debentures
Dec. 31, 2011
Debentures
Aug. 31, 2010
Preferred stock
director
Sep. 30, 2012
Preferred stock
director
Q
Dec. 31, 2011
Preferred stock
director
Q
Dec. 31, 2010
Preferred stock
Dec. 31, 2011
Preferred stock
Q
Sep. 30, 2012
Preferred stock
Q
Sep. 30, 2012
Preferred stock
Minimum
series
Dec. 31, 2011
Preferred stock
Minimum
series
Dec. 31, 2010
Common stock
Stockholders equity                                              
Preferred stock, shares issued 1,213,142   1,213,142 1,213,142                       1,213,142 1,213,142   1,213,142 1,213,142      
Preferred stock, shares outstanding 1,213,142   1,213,142 1,213,142                       1,213,142 1,213,142   1,213,142 1,213,142      
Preferred stock, par value (in dollars per share) $ 0.001   $ 0.001 $ 0.001                       $ 10.00 $ 10.00   $ 10.00 $ 10.00      
Dividend rate (as a percent) 6.00% 6.00%                           6.00% 6.00%            
Liquidation preference (in dollars per share)                               $ 10 $ 10   $ 10 $ 10      
Number of shares to be issued for each preferred stock upon conversion                               0.06079 0.06079            
Conversion price (in dollars per share)                               $ 164.50 $ 164.50            
Shares reserved for future issuance upon conversion                               73,747 73,747   73,747 73,747      
Number of shares converted                                   833,671 1,776,858 1,776,858      
Preferred stock conversions (in shares)                                             236,514
Closing price of stock (in dollars per share)                                         $ 246.75 $ 246.75  
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the preferred stock to be convertible                               150.00% 150.00%            
Number of trading days within 30 trading days in which the closing price of the entity's common stock must exceed the conversion price for the preferred stock to be convertible                                         20 days 20 days  
Number of series                                         1 1  
Number of trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the preferred stock to be convertible                               30 days 30 days            
Number of trading days prior to notice of automatic conversion                               5 days 5 days            
Number of quarters in which no preferred stock dividends have been paid                               6 6   6 6      
Number of Board of Directors to be elected by Preferred Stock holders if entity fails to pay dividends on Preferred Stock                               2 2            
Number of Board of Directors elected by the Preferred Stock holders when the entity failed to pay dividends on Preferred Stock                             2                
Redemption price per share (in dollars per share)         $ 10.18 $ 10.18 $ 10.12 $ 10.12 $ 10.06 $ 10.06 $ 10.00 $ 10.00                      
Interest rate (as a percent)                         6.00% 6.00%                  
Debt principal amount per share, basis for exchange (in dollars per share)                         $ 10 $ 10                  
Debt instrument, term                         25 years 25 years