Mortgage Loans On Real Estate (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Mortgage Loans on Real Estate [Line Items]
Percentage of loan representing total loan assets	3.00%
Mortgage Loans on Real Estate (Textual) [Abstract]
Accrued interest	$ 1,014
Whole Loan [Member]
Mortgage Loans on Real Estate [Line Items]
Percentage of loan representing total loan assets	3.00%
Whole Loan [Member] | Philadelphia [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage Loans on Real Estate Adjust Interest Rate	7.50%
Mortgage loan on real estate extended maturity date	Feb. 01, 2016
B Note [Member]
Mortgage Loans on Real Estate [Line Items]
Percentage of loan representing total loan assets	3.00%