Variable Interest Entities Property Asset Carrying Value and Maximum Exposure (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Ashley Square [Member]
Maximum Exposure to Loss	$ 12,244,123	$ 11,835,664
Carrying Value	6,694,000	6,804,981
Ashley Square [Member] | Available-for-sale Securities [Member]
Maximum Exposure to Loss	5,212,000	5,260,000
Carrying Value	5,212,000	5,506,981
Ashley Square [Member] | Property Loan [Member]
Maximum Exposure to Loss	7,131,757	6,575,664
Carrying Value	1,482,000	1,298,000
Cross Creek [Member]
Maximum Exposure to Loss	9,490,912	9,388,039
Carrying Value	10,971,178	11,382,950
Cross Creek [Member] | Available-for-sale Securities [Member]
Maximum Exposure to Loss	6,042,297	6,004,424
Carrying Value	7,522,563	7,999,335
Cross Creek [Member] | Property Loan [Member]
Maximum Exposure to Loss	3,448,615	3,383,615
Carrying Value	$ 3,448,615	$ 3,383,615