Noncontrolling Interests (Tables)

6 Months Ended

Jun. 30, 2012

Noncontrolling Interests [Abstract]

Schedule of activity for noncontrolling interests

	Six Months Ended June 30, 2012			Year Ended December 31, 2011
Beginning balance	$	21,786,577		$	18,577,800
Repurchase of noncontrolling interests		(113,473	)		—
Contribution of noncontrolling interests		—			7,788,990
Distributions for noncontrolling interests		(1,162,169	)		(2,135,649	)
Allocated distributions for noncontrolling interests subject to redemption		(57,866	)		(169,775	)
Net loss		(1,409,333	)		(2,274,789	)
Ending balance	$	19,043,736		$	21,786,577