Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Property revenues	$ 17,404,439	$ 17,789,125	$ 14,250,572
Investment income	36,892,996	34,409,809	26,606,234
Contingent interest income	2,021,077	4,756,716	40,000
Other interest income	2,660,238	2,624,262	856,217
Other income		373,379	188,000
Total revenues	58,978,750	59,953,291	41,941,023
Expenses:
Real estate operating (exclusive of items shown below)	9,223,108	10,052,669	7,796,761
Provision for loan loss	0	0	75,000
Impairment charge	61,506
Depreciation and amortization	6,862,530	6,505,011	4,897,916
Amortization of deferred financing costs	1,862,509	1,622,789	1,183,584
Interest expense	15,469,639	14,826,217	11,165,911
General and administrative	10,837,188	8,660,889	5,547,208
Total expenses	44,316,480	41,667,575	30,666,380
Other Income:
Gain on sale of MF Properties	14,072,317	4,599,109
Gain on sale of securities	8,097		3,701,772
Income before income taxes	28,742,684	22,884,825	14,976,415
Income tax expense	4,959,000	0	0
Income from continuing operations	23,783,684	22,884,825	14,976,415
Income from discontinued operations (including gain on sale of VIEs of approximately $3.2 million in 2015)		3,721,397	52,773
Net income	23,783,684	26,606,222	15,029,188
Net loss attributable to noncontrolling interest	(823)	(2,801)	(4,673)
Partnership net income	23,784,507	26,609,023	15,033,861
Redeemable Series A preferred unit distributions and accretion	(583,407)
Net income available to Partners	23,201,100	26,609,023	15,033,861
Net income (loss) available to Partners and noncontrolling interest allocated to:
General Partner	2,992,106	2,474,274	1,056,316
Unallocated gain (loss) of Consolidated VIEs		3,721,397	(635,560)
Net loss attributable to noncontrolling interest	(823)	(2,801)	(4,673)
Net income available to Partners and noncontrolling interest	$ 23,200,277	$ 26,606,222	$ 15,029,188
Unitholdersʼ interest in net income per unit (basic and diluted):
Income from continuing operations	$ 0.34	$ 0.34	$ 0.25
Net income per unit, basic and diluted	0.34	0.34	0.25
Distributions declared, per unit	$ 0.50	$ 0.50	$ 0.50
Weighted average number of units outstanding, basic	60,182,264	60,252,928	59,431,010
Weighted average number of units outstanding, diluted	60,182,264	60,252,928	59,431,010
Unitholders [Member]
Net income (loss) available to Partners and noncontrolling interest allocated to:
Limited Partners	$ 20,176,693	$ 20,413,352	$ 14,613,105
Restricted Unitholders [Member]
Net income (loss) available to Partners and noncontrolling interest allocated to:
Limited Partners	$ 32,301