Other Assets Loan Receivable and Allowance (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property loan receivable, outstanding balance	$ 22,979,599	$ 20,328,927
Accrued interest	6,894,206	6,419,047
Loan loss reserves	(18,607,061)	(18,134,902)
Net taxable loans	11,266,744	8,613,072
Arbors at Hickory Ridge [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property loan receivable, outstanding balance	191,264	191,264
Accrued interest	3,697	697
Loan loss reserves	0	0
Net taxable loans	194,961	191,961
Ashley Square [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property loan receivable, outstanding balance	4,894,342	4,894,342
Accrued interest	1,777,022	1,681,322
Loan loss reserves	(5,373,364)	(5,277,664)
Net taxable loans	1,298,000	1,298,000
Cross Creek [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property loan receivable, outstanding balance	6,653,087	6,588,087
Accrued interest	1,638,905	1,578,288
Loan loss reserves	(4,843,377)	(4,782,760)
Net taxable loans	3,448,615	3,383,615
Iona Lakes [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property loan receivable, outstanding balance	7,965,344	7,741,118
Accrued interest	3,030,363	2,856,290
Loan loss reserves	(7,031,985)	(6,857,912)
Net taxable loans	3,963,722	3,739,496
Ohio Properties [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property loan receivable, outstanding balance	2,361,446
Accrued interest	105,271
Loan loss reserves	(105,271)
Net taxable loans	2,361,446
Woodland Park [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property loan receivable, outstanding balance	914,116	914,116
Accrued interest	338,948	302,450
Loan loss reserves	(1,253,064)	(1,216,566)
Net taxable loans	$ 0	$ 0