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13. BUSINESS SEGMENTS (Details 1) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Business Segments Details 1        
Total segment operating income $ 19,077,134 $ 16,721,205 $ 30,157,374 $ 25,678,067
Corporate costs (128,007) (69,279) (257,995) (229,361)
Unrealized gain/(loss) on translation of intercompany balance (466,655) 679,196 (603,910) 548,734
Income from operations 18,482,472 17,331,122 29,295,469 25,997,440
Other income, net of expense 90,656 76,319 174,605 144,636
Income before taxes $ 18,573,128 $ 17,407,441 $ 29,470,074 $ 26,142,076