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CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (General and Administrative Expenses [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
General and Administrative Expenses [Member]
Allocation of Recognized Period Costs [Line Items]
Stock based compensation expense	$ 467,028	$ 600,936	$ 335,076

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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