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Valuation Qualtitative Information (Details) (Level 3 [Member], USD $) In Thousands, except Per Share data, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value | $ 47,189 |  |  |
Non-Agency RMBS [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value | 30,962 |  |  |
Non-Agency RMBS [Member] | Discounted Cash Flows [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value | 3,505 |  | 13,596 |
Non-Agency RMBS [Member] | Minimum [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 30.25 |  |  |
Non-Agency RMBS [Member] | Minimum [Member] | Discounted Cash Flows [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Yield | 12.00% |  | 6.20% |
Projected Collateral Prepayments | 30.00% |  | 12.60% |
Projected Collateral Losses | 4.00% |  | 11.30% |
Projected Collateral Recoveries | 6.50% |  | 6.80% |
Projected Collateral Scheduled Amortization | 46.30% |  | 3.00% |
Non-Agency RMBS [Member] | Maximum [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 102.97 |  |  |
Non-Agency RMBS [Member] | Maximum [Member] | Discounted Cash Flows [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Yield | 19.10% |  | 20.40% |
Projected Collateral Prepayments | 43.30% |  | 52.20% |
Projected Collateral Losses | 6.00% |  | 41.40% |
Projected Collateral Recoveries | 12.60% |  | 33.20% |
Projected Collateral Scheduled Amortization | 51.40% |  | 52.70% |
Non-Agency RMBS [Member] | Weighted Average [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 78.94 | [1] |  |
Non-Agency RMBS [Member] | Weighted Average [Member] | Discounted Cash Flows [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Yield | 15.90% | [1] | 8.50% | [1]
Projected Collateral Prepayments | 37.30% | [1] | 29.40% | [1]
Projected Collateral Losses | 4.90% | [1] | 26.90% | [1]
Projected Collateral Recoveries | 9.20% | [1] | 23.80% | [1]
Projected Collateral Scheduled Amortization | 48.60% | [1] | 19.90% | [1]
Projected Total | 100.00% | [1] | 100.00% | [1]
Interest-Only [Member] | Agency RMBS [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value | 10,371 |  |  |
Interest-Only [Member] | Agency RMBS [Member] | Income Approach Valuation Technique [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value | $ 2,351 |  |  |
Interest-Only [Member] | Agency RMBS [Member] | Minimum [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 4.89 |  |  |
Interest-Only [Member] | Agency RMBS [Member] | Minimum [Member] | Income Approach Valuation Technique [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
FairValueInputsLiborOas | 5.40% | [2] |  |
Projected Collateral Prepayments | 59.10% |  |  |
Projected Collateral Scheduled Amortization | 32.30% |  |  |
Interest-Only [Member] | Agency RMBS [Member] | Maximum [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 21.42 |  |  |
Interest-Only [Member] | Agency RMBS [Member] | Maximum [Member] | Income Approach Valuation Technique [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
FairValueInputsLiborOas | 6.45% | [2] |  |
Projected Collateral Prepayments | 67.70% |  |  |
Projected Collateral Scheduled Amortization | 40.90% |  |  |
Interest-Only [Member] | Agency RMBS [Member] | Weighted Average [Member] | Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 13.80 | [1] |  |
Interest-Only [Member] | Agency RMBS [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
FairValueInputsLiborOas | 5.83% | [1],[2] |  |
Projected Collateral Prepayments | 62.60% | [1] |  |
Projected Collateral Scheduled Amortization | 37.40% | [1] |  |
Projected Total | 100.00% | [1] |  |
[1] | Averages are weighted based on the fair value of the related instrument.
[2] | Shown in basis points.

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