Equity, Accumulated Other Comprehensive Loss (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss	$ 4,840,950	$ 14,668,250
Net unrealized losses on derivatives designated as cash flow hedges, net of deferred losses on terminated interest swaps	4,700,000	13,900,000
Deferred losses on terminated interest swaps	600,000	1,100,000
Unrealized gain related to available-for-sale securities	400,000	(300,000)
Income attributable to noncontrolling interest			$ 100,000
Distributions attributable to noncontrolling interest			$ 2,055,972
Interest Expense
Accumulated Other Comprehensive Loss
Net realized losses on derivatives designated as cash flow hedges	(6,149,090)	(10,706,246)
Loss on Termination of Swaps
Accumulated Other Comprehensive Loss
Net realized losses on derivatives designated as cash flow hedges	$ (4,626,192)
Other Income | Residential mortgage-backed security (RMBS)
Accumulated Other Comprehensive Loss
Net realized gain on sale of available-for-sale investments		$ 431,476