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Fair Value - Narrative (Details)	12 Months Ended
	Dec. 31, 2015
Loans Held for Investment - Reverse Mortgages [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life	6 years 5 months 26 days
Repayment rate	19.85%
Discount rate	3.36%
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 1 month 9 days
Repayment rate	4.96%
Loans Held for Investment - Reverse Mortgages [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life	9 years 8 months 12 days
Repayment rate	53.75%
HMBS - Related Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life	5 years 4 months 20 days
Repayment rate	19.85%
Discount rate	2.78%
HMBS - Related Borrowings [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life	4 years 8 months 23 days
Repayment rate	4.96%
HMBS - Related Borrowings [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Life	9 years 8 months 12 days
Repayment rate	53.75%

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Fair Value Inputs, Repayment Rate

+ References

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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