BUSINESS SEGMENT DATA - Summary of Operations in Different Segments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Business segment data
Total Revenues	$ 22,837,783	$ 12,873,938	$ 61,551,067	$ 31,228,373
Operating Income (Loss)	8,040,407	4,732,868	30,889,818	11,126,184
Depreciation and Amortization	3,215,690	1,805,559	5,978,265	3,872,926
Identifiable Assets	432,041,488		432,041,488		$ 408,623,426
Operating Segments
Business segment data
Capital Expenditures	23,054,515	135,421	46,611,872	2,947,608
General and Corporate Expense
Business segment data
Operating Income (Loss)	(5,942,877)	(4,312,559)	(9,699,073)	(11,387,291)
Income Properties
Business segment data
Total Revenues	7,565,007	6,033,082	14,638,247	12,462,323
Depreciation and Amortization	3,108,494	1,724,573	5,794,806	3,705,623
Identifiable Assets	343,813,767		343,813,767		302,757,565
Income Properties | Operating Segments
Business segment data
Operating Income (Loss)	5,935,492	4,829,042	11,597,019	10,081,576
Capital Expenditures	22,748,812	122,260	44,686,344	2,918,580
Commercial Loan Investments
Business segment data
Total Revenues	553,159	635,050	1,089,648	1,516,295
Identifiable Assets	24,032,397		24,032,397		24,032,885
Commercial Loan Investments | Operating Segments
Business segment data
Operating Income (Loss)	553,159	635,050	1,089,648	1,516,295
Real Estate Operations
Business segment data
Total Revenues	13,257,355	4,774,620	42,731,815	14,335,518
Identifiable Assets	44,342,891		44,342,891		58,868,298
Real Estate Operations | Operating Segments
Business segment data
Operating Income (Loss)	7,464,826	3,649,979	27,782,437	10,953,836
Golf Operations
Business segment data
Total Revenues	1,383,513	1,412,196	2,858,457	2,876,555
Depreciation and Amortization	95,323	68,619	160,690	137,268
Identifiable Assets	6,114,499		6,114,499		3,675,842
Golf Operations | Operating Segments
Business segment data
Operating Income (Loss)	(18,406)	(34,980)	(42,140)	24,791
Capital Expenditures	266,758		1,874,500	13,161
Agriculture And Other
Business segment data
Total Revenues	78,749	18,990	232,900	37,682
Depreciation and Amortization	11,873	12,367	22,769	30,035
Identifiable Assets	13,737,934		13,737,934		$ 19,288,836
Agriculture And Other | Operating Segments
Business segment data
Operating Income (Loss)	48,213	(33,664)	161,927	(63,023)
Capital Expenditures	$ 38,945	$ 13,161	$ 51,028	$ 15,867