Warehouse Borrowings - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 22, 2015
Short-term Debt [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		22.30%
Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Short Term Debt, Aggregate Funding Capacity	$ 2,400.0
Debt instrument maturity date
Minimum [Member] | Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Interest spread	2.10%
Maximum [Member] | Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Interest spread	3.50%
Pledged Residential Loans [Member] | Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Short-term Debt	$ 1,600.0
Short Term Debt Collateral Amount	1,700.0
Repurchased HECMs and REO [Member] | Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Short-term Debt	0.0
Short Term Debt Collateral Amount	$ 46.7
Borrowings to fund purchase or origination of residential loans [Member] | Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Short-term Debt, Terms	60 days
Short Term Debt Maximum Repayment Days	90 days
Days to Transfer Loans	20 days
Borrowings to fund repurchase performing HECMs [Member] | Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Short Term Debt Maximum Repayment Days	120 days
Borrowings to fund repurchase non-performing HECMs [Member] | Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Short Term Debt Maximum Repayment Days	364 days