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CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2010
Allocation of Recognized Period Costs [Line Items]
Stock based compensation expense	$ 835,736
General and Administrative Expenses [Member]
Allocation of Recognized Period Costs [Line Items]
Stock based compensation expense	585,816
Long term incentive program expense in general and administrative expense	$ 249,920

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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