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Income Tax (Details 2) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Summary of Components of income tax expense        
Current $ 4,281,918 $ 626,528 $ 5,216,018 $ 855,572
Deferred (2,402,166) 142,013 (2,409,053) 555,716
Income tax expense $ 1,879,752 $ 768,541 $ 2,758,674 $ 1,478,172