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Repurchase Agreements (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2012 Agreements | Dec. 31, 2011 Agreements
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Debt, Weighted Average Interest Rate | 0.63% | 0.61%
Number of Agreement Borrowings Outstanding | 21 | 20
Available Repurchase Agreement Counterparties | 28 |
Concentration Risk, Percentage | 18.00% |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 3,670,972 | $ 2,093,793
Fair value of Collateral Pledged | 4,045,087 | 2,268,312
Deferred Costs | (764) |
Weighted Average Maturity of Agreements | 52 days | 57 days
Agency RMBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Debt, Weighted Average Interest Rate | 0.41% | 0.38%
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 2,560,779 | 1,447,508
Fair value of Collateral Pledged | 2,665,860 | 1,521,107
Agency CMBS and CMBS IO [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Debt, Weighted Average Interest Rate | 0.93% | 0.59%
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 634,327 | 290,362
Fair value of Collateral Pledged | 789,792 | 329,612
Non-Agency RMBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Debt, Weighted Average Interest Rate | 1.82% | 1.85%
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 11,042 | 12,195
Fair value of Collateral Pledged | 12,761 | 13,597
Non-Agency CMBS and CMBS IO [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Debt, Weighted Average Interest Rate | 1.39% | 1.54%
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 431,039 | 283,266
Fair value of Collateral Pledged | 540,332 | 336,124
Bonds [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Debt, Weighted Average Interest Rate | 1.67% | 1.65%
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 34,549 | 60,462
Fair value of Collateral Pledged | $ 36,342 | $ 67,872

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- Definition Assets Sold Under Agreements to Repurchase, Number of Agreement Borrowings Available + References No definition available. + Details
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- Definition Number of Agreement Borrowings Outstanding held by the entity. + References No definition available. + Details
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- Definition Represents the percentage of equity at risk under all repurchase agreements with a particular counterparty where equity at risk is defined as the excess of carrying amount (or market value, if higher than the carrying amount) of the securities or other assets pledged as collateral to secure the repurchase agreement borrowings over the amount of the repurchase liability outstanding. + References No definition available. + Details
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- Details
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- Definition Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of debt outstanding by type or by instrument at that time. + References No definition available. + Details
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- Definition The carrying amount of deferred costs. + References No definition available. + Details
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- Definition The carrying amount as of the date of the latest financial statement presented of mortgage-related securities classified as available for sale or held for investment which are owned but transferred to another party to serve as collateral to partially or fully secure a debt obligation, repurchase agreement or other current or potential obligation, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4/FIN46(R)-8 -Paragraph B6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Weighted average maturity (weighted by amount of the agreement) of repurchase agreements with the counterparty, 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph m -Subparagraph 1 -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(B)(iii)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 + Details
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- Definition Carrying amount of liabilities associated with financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS140-4/FIN46(R)-8 -Paragraph B12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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