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Securitizations and Variable Interest Entities - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Servicing Assets at Fair Value [Line Items] |  |  |  |  |
Average period to securitization |  |  | 30 days |  |
Percentage of loan transferred through securitization 60 days or more past due |  |  | 5.90% |  | 5.10%
Charge-offs, net of recoveries associated with transferred loans | $ 0 |  | $ 0 |  |
Mortgage Servicing Rights - Amortized Costs [Member] |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |
Acquisitions | 9,800,000 | $ 9,800,000 | 18,300,000 | $ 21,400,000 |
HMBS - Related Borrowings [Member] |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |
Secured borrowings | 2,000,000,000 |  | 2,000,000,000 |  | $ 1,400,000,000
Lending [Member] | HECM [Member] |  |  |  |  |
Servicing Assets at Fair Value [Line Items] |  |  |  |  |
Loans pledged as collateral | $ 2,100,000,000 |  | $ 2,100,000,000 |  | $ 1,600,000,000

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- Definition Percentage of loan transferred through securitization 60 days or more past due. + References No definition available. + Details
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- Definition Amount of secured borrowings recognized in the transferor's statement of financial position at the end of the period presented that are associated with the transfers of reverse mortgages where the transfers are accounted for as a financing. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5086-111524 + Details
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