Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Summary of Basic and diluted earnings per share
Net income	$ 5,530,144	$ 2,727,211	$ 7,919,872	$ 5,814,290
Weighted average number of common shares- Basic and diluted	14,781,241	14,777,610	14,781,241	14,775,869
Earnings per share - Basic and diluted	$ 0.37	$ 0.18	$ 0.54	$ 0.39