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Earnings Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net (loss) income attributable to common shareholders	$ (639,018)	$ 1,744,290	$ 215,691	$ 2,167,498
Denominator:
Weighted-average shares outstanding – basic (in shares)	18,405,522	19,771,167	18,580,891	19,889,583
Dilutive effect of other securities (in shares)	0	225,638	175,800	227,663
Weighted-average shares outstanding – diluted (in shares)	18,405,522	19,996,805	18,756,691	20,117,246

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