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Securitization and Variable Interest Entities - Narrative (Details) (USD $)
 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2014
Advance Receivable Backed Notes Series F [Member]
Dec. 31, 2013
Advance Receivable Backed Notes Series F [Member]
Jun. 30, 2014
Lending [Member]
HECM [Member]
Dec. 31, 2013
Lending [Member]
HECM [Member]
Jun. 30, 2014
HMBS - Related Borrowings [Member]
Dec. 31, 2013
HMBS - Related Borrowings [Member]
Jun. 30, 2014
Mortgage Servicing Rights - Amortized Costs [Member]
Jun. 30, 2013
Mortgage Servicing Rights - Amortized Costs [Member]
Jun. 30, 2014
Mortgage Servicing Rights - Amortized Costs [Member]
Jun. 30, 2013
Mortgage Servicing Rights - Amortized Costs [Member]
Servicing Assets at Fair Value [Line Items]                        
Acquisitions                 $ 9,800,000 $ 18,200,000 $ 21,400,000 $ 46,900,000
Percentage Of Loan Transferred Through Securitization 60 Days Or More Past Due 3.60% 2.60%                    
Secured Borrowings With Pledge Of Collateral             1,000,000,000 615,600,000        
Loans Pledged as Collateral         1,100,000,000 618,000,000            
Match Funded Liabilities     $ 17,747,000 $ 33,211,000