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5. INVESTMENT IN JOINT VENTURES (Details-Joint ventures) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]    
Beginning balance $ 28,949  
Equity contributions in existing joint ventures 1,161  
Equity earnings in these joint ventures 4,722 4,481
Distribution of earnings (7,358) (5,624)
Ending balance $ 27,474