Residential Loans at Amortized Cost, Net - Schedule of Percentage Of Residential Loans By State (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Concentration Risk [Line Items]
Concentration of Credit Risk, Percentage	5.00%
Residential Loans [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	100.00%	100.00%
TEXAS [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	35.00%	35.00%
MISSISSIPPI [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	15.00%	15.00%
ALABAMA [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	8.00%	8.00%
FLORIDA [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	7.00%	7.00%
LOUISIANA [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	6.00%	6.00%
SOUTH CAROLINA [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	6.00%	6.00%
GEORGIA [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	5.00%	5.00%
Other Less Than 5% [Member] | Residential Loans At Amortized Cost Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	18.00%	18.00%