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2. SUMMARY OF ACCOUNTING POLICIES (Details - Investment in Joint Ventures) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]        
Beginning balance     $ 52,435  
Equity earnings in these joint ventures $ 2,822 $ 3,450 9,547 $ 8,372
Distribution of earnings     (21,783) $ (6,785)
Equity contributions in existing and purchase of interest in joint ventures     2,000  
Ending balance $ 42,199   $ 42,199