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v2.4.1.9

Repurchase Agreements Repurchase Agreements, Term to Original Maturity (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 3,185,843us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount | $ 3,013,110us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount
Less than 30 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 254,535us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_Lessthan30daysMember | 250,635us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_Lessthan30daysMember
30 to 90 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 1,663,214us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A30to90daysMember | 617,399us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A30to90daysMember
91 to 180 days [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 292,472us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A91to180daysMember | 904,830us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A91to180daysMember
6 months to 1 year [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | 862,767us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A6monthsto1yearMember | 1,030,569us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A6monthsto1yearMember
1 year or longer [Member] |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount | $ 112,855us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A1yearorlongerMember | $ 209,677us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = dx_A1yearorlongerMember

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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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