Business Segment Data - Summary of Operations in Different Segments (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 25,837,844	$ 16,232,970	$ 12,966,428
Operating Income (Loss)	6,279,377	863,901	(8,968,692)
Identifiable Assets	226,183,680	184,696,900	170,265,803
Depreciation and Amortization	2,885,317	2,010,505	2,197,469
Capital Expenditures	58,447,040	26,395,624	3,327,346
Operating Segments [Member] | Income Properties [Member]
Segment Reporting Information [Line Items]
Revenues	12,828,214	8,463,082	7,679,224
Operating Income (Loss)	11,494,240	7,786,986	7,152,265
Identifiable Assets	151,682,578	130,726,326	116,943,722
Depreciation and Amortization	2,650,310	1,742,589	1,500,511
Capital Expenditures	40,418,981	25,945,926	2,493,663
Operating Segments [Member] | Commercial Mortgage Loan [Member]
Segment Reporting Information [Line Items]
Revenues	1,712,913
Operating Income (Loss)	1,712,913
Identifiable Assets	18,887,979
Depreciation and Amortization
Capital Expenditures	17,658,204
Operating Segments [Member] | Real Estate [Member]
Segment Reporting Information [Line Items]
Revenues	5,945,510	3,098,840	501,626
Operating Income (Loss)	2,291,609	2,393,778	(250,504)
Identifiable Assets	29,929,179	34,161,944	34,529,445
Depreciation and Amortization
Capital Expenditures
Operating Segments [Member] | Golf Operations [Member]
Segment Reporting Information [Line Items]
Revenues	5,074,898	4,506,069	4,660,802
Operating Income (Loss)	(412,177)	(887,564)	(1,332,835)
Identifiable Assets	3,269,212	3,230,225	2,858,448
Depreciation and Amortization	205,097	173,110	359,743
Capital Expenditures	223,690	343,969	267,273
Operating Segments [Member] | Agriculture and Other [Member]
Segment Reporting Information [Line Items]
Revenues	276,309	164,979	124,776
Operating Income (Loss)	127,949	(33,855)	(526,647)
Identifiable Assets	22,414,732	16,578,405	15,934,188
Depreciation and Amortization	29,910	94,806	337,215
Capital Expenditures	146,165	105,729	566,410
Operating Segments [Member] | General and Corporate Expense [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ (8,935,157)	$ (8,395,444)	$ (14,010,971)