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NON-CONTROLLING INTEREST (Details) (Holdings, Preferred Shares, USD $)
12 Months Ended
Dec. 31, 2012
Jun. 29, 2012
Holdings | Preferred Shares
   
Non-controlling interest    
Number of preferred shares issued   111
Par value of shares (in dollars per share)   $ 1,000
Cumulative preferential annual cash dividend (as a percent) 12.50%  
Redemption price (in dollars per share) $ 1,000  
Liquidation preference (in dollars per share) $ 1,000