SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 6) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Goodwill and intangible assets      
Goodwill impairment loss $ 0 $ 0 $ 11,388
Development right | Binglangjiang
     
Goodwill and intangible assets      
Estimated useful lives for the intangible assets 30 years    
Dam use right | Jinling
     
Goodwill and intangible assets      
Estimated useful lives for the intangible assets 40 years    
Software
     
Goodwill and intangible assets      
Estimated useful lives for the intangible assets 5 years    
Land use rights | PRC
     
Goodwill and intangible assets      
Agreement term of land use rights 50 years    
Land use rights | PRC | Minimum
     
Goodwill and intangible assets      
Estimated useful lives for the intangible assets 41 years    
Land use rights | PRC | Maximum
     
Goodwill and intangible assets      
Estimated useful lives for the intangible assets 50 years