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Fair Value - Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Gains (losses) attributable to derivatives $ (0.2) $ 0.1 $ (0.4)
HMBS - Related Borrowings [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Life     5 years 7 months 20 days
Repayment rate     19.21%
Discount rate     2.37%
HMBS - Related Borrowings [Member] | Minimum [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Life     5 years 1 month 2 days
Repayment rate     4.80%
HMBS - Related Borrowings [Member] | Maximum [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Life     9 years 4 months 24 days
Repayment rate     53.75%
Borrowings [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate     5.49%
Loans Held for Investment - Reverse Mortgages [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Life     6 years 11 months 1 day
Repayment rate     19.21%
Discount rate     3.29%
Loans Held for Investment - Reverse Mortgages [Member] | Minimum [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Life     6 years 8 months 16 days
Repayment rate     4.80%
Loans Held for Investment - Reverse Mortgages [Member] | Maximum [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Life     10 years 6 months 18 days
Repayment rate     53.75%
Mortgage Servicing Rights [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate     10.92%
Prepayment rate     13.83%
Delinquency rate     16.89%
Mortgage Servicing Rights [Member] | Minimum [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate     9.42%
Prepayment rate     7.00%
Delinquency rate     7.97%
Fair value inputs basis spread on variable rate     0.00%
Mortgage Servicing Rights [Member] | Maximum [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate     15.27%
Prepayment rate     18.37%
Delinquency rate     32.30%
Fair value inputs basis spread on variable rate     3.50%
Fair Value Mortgage Servicing Rights [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate     9.01%
Prepayment rate     8.82%