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STOCKHOLDERS' EQUITY (Details) (USD $)
 6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2013
Year from November 1, 2012 to October 31, 2013
Jun. 30, 2013
Year from November 1, 2013 to October 31, 2014
Jun. 30, 2013
November 1, 2014 and thereafter
Jun. 30, 2013
Debentures
Jun. 30, 2013
Preferred stock
Jun. 30, 2013
Preferred stock
Minimum
day
Stockholders' equity                
Preferred stock, shares issued 420,682 1,213,142         420,682  
Preferred stock, shares outstanding 420,682 1,213,142            
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001         $ 10.00  
Dividend rate (as a percent)             6.00%  
Liquidation preference (in dollars per share)             $ 10  
Number of shares to be issued for each preferred stock upon conversion             0.06079  
Conversion price (in dollars per share)             $ 164.50  
Shares reserved for future issuance upon conversion             25,573  
Closing price of stock (in dollars per share)               $ 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%  
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
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  
Number of trading days prior to notice of automatic conversion             5 days  
Redemption price per share (in dollars per share)     $ 10.12 $ 10.06 $ 10.00      
Interest rate (as a percent)           6.00% 6.00%  
Debt principal amount per share, basis for exchange (in dollars per share)           $ 10    
Debt instrument, term           25 years