Loans Receivable - Loan Receivable Portfolio (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Original Face Amount	$ 20,500,000
Face Amount	20,474,000
Discount	(2,334,000)	[1]
Loan investments	18,139,541		0
W Hotel [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Original Face Amount	6,500,000
Face Amount	6,474,000
Discount	(2,474,000)	[1]
Loan investments	4,000,000
Regency Park Apartments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Original Face Amount	5,000,000
Face Amount	5,000,000
Discount	54,000	[1]
Loan investments	5,054,000
121 West Trade Office [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Original Face Amount	9,000,000
Face Amount	9,000,000
Discount	86,000	[1]
Loan investments	$ 9,086,000

[1] Includes acquisition fees and expenses