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Valuation Qualtitative Information (Details) (Non-Agency RMBS [Member], Level 3 [Member], USD $) In Thousands, except Per Share data, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Market Quotes [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value | $ 10,129 |  |  |
Discounted Cash Flows [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Fair Value | $ 2,231 |  | $ 13,596 |
Minimum [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 25.55 |  |  |
Yield | 7.90% |  | 6.20% |
Projected Collateral Prepayments | 18.90% |  | 12.60% |
Projected Collateral Losses | 34.70% |  | 11.30% |
Projected Collateral Recoveries | 26.00% |  | 6.80% |
Projected Collateral Scheduled Amortization | 20.40% |  | 3.00% |
Maximum [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 82.13 |  |  |
Yield | 7.90% |  | 20.40% |
Projected Collateral Prepayments | 18.90% |  | 52.20% |
Projected Collateral Losses | 34.70% |  | 41.40% |
Projected Collateral Recoveries | 26.00% |  | 33.20% |
Projected Collateral Scheduled Amortization | 20.40% |  | 52.70% |
Weighted Average [Member] |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |
Non Binding Indicative Price | $ 69.63 | [1] |  |
Yield | 7.90% | [1] | 8.50% | [1]
Projected Collateral Prepayments | 18.90% | [1] | 29.40% | [1]
Projected Collateral Losses | 34.70% | [1] | 26.90% | [1]
Projected Collateral Recoveries | 26.00% | [1] | 23.80% | [1]
Projected Collateral Scheduled Amortization | 20.40% | [1] | 19.90% | [1]
Projected Total | 100.00% | [1] | 100.00% | [1]
[1] | Averages are weighted based on the fair value of the related instrument.

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