Mortgage Loans (Schedule of Concentrations of Credit Risk) (Details) (Mortgage Receivable [Member])	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Loans with Unpaid Principal Balance in Excess of Fair Value of Collateral [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	65.50%	73.60%
Geographic Concentration Risk [Member] | California [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	25.40%	25.60%
Geographic Concentration Risk [Member] | Florida [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	16.50%	17.80%
Geographic Concentration Risk [Member] | Georgia [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	6.40%	6.80%