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v2.4.1.9

Repurchase Agreements (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | $ 3,013,110 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount | $ 3,580,754 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount
Repurchage agreement, Weighted Average Interest Rate | 0.55%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate | 0.61%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate
Fair Value of Collateral Pledged | 3,274,597 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount | 3,890,066 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount
Deferred Costs | 0 us-gaap_DeferredFinanceCostsNoncurrentNet | (243)us-gaap_DeferredFinanceCostsNoncurrentNet
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements | 144 days | 114 days
Collateralized Mortgage Obligations [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | 9,834 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CollateralizedMortgageObligationsMember | 20,651 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CollateralizedMortgageObligationsMember
Repurchage agreement, Weighted Average Interest Rate | 1.51%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CollateralizedMortgageObligationsMember | 1.59%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CollateralizedMortgageObligationsMember
Fair Value of Collateral Pledged | 11,000 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CollateralizedMortgageObligationsMember | 19,686 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CollateralizedMortgageObligationsMember
Residential Mortgage Backed Securities [Member] | Agency MBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | 1,977,338 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember | 2,522,503 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember
Repurchage agreement, Weighted Average Interest Rate | 0.39%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember | 0.42%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember
Fair Value of Collateral Pledged | 2,064,704 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember | 2,598,158 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember
Residential Mortgage Backed Securities [Member] | Non-Agency MBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | 17,594 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember | 10,569 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember
Repurchage agreement, Weighted Average Interest Rate | 1.57%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember | 1.80%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember
Fair Value of Collateral Pledged | 21,787 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember | 12,746 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_ResidentialMortgageBackedSecuritiesMember
Commercial Mortgage Backed Securities [Member] | Agency MBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | 253,857 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 246,849 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Repurchage agreement, Weighted Average Interest Rate | 0.36%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 0.39%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Fair Value of Collateral Pledged | 291,103 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 306,318 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Commercial Mortgage Backed Securities [Member] | Non-Agency MBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | 114,895 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 303,674 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Repurchage agreement, Weighted Average Interest Rate | 1.15%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 1.27%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
Fair Value of Collateral Pledged | 140,216 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember | 367,859 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommercialMortgageBackedSecuritiesMember
CMBS IO [Member] | Agency MBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | 372,609 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember | 369,948 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember
Repurchage agreement, Weighted Average Interest Rate | 0.92%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember | 1.16%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember
Fair Value of Collateral Pledged | 430,638 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember | 449,072 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember
CMBS IO [Member] | Non-Agency MBS [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Repurchase Agreements Accounted for as Secured Borrowings | 266,983 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember | 106,803 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember
Repurchage agreement, Weighted Average Interest Rate | 1.04%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember | 1.27%us-gaap_AssetsSoldUnderAgreementsToRepurchaseInterestRate / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember
Fair Value of Collateral Pledged | $ 315,149 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember | $ 136,227 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssetsCarryingAmount / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_InterestOnlyStripMember

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- Definition Interest rate on the amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets. + 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)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Net amount of long-term deferred finance costs capitalized at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + 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=26873400&loc=d3e23780-122690 + Details
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- Definition Carrying amount of 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=34720971&loc=SL6224234-111729 + 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=34720971&loc=SL6224234-111729 + Details
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