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Repurchase Agreements Counterparty Information (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 Agreements
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Counterparty Information [Line Items] |
Concentration Risk, Percentage | 17.00%
Amount outstanding with counterparty | $ 401,404
Weighted average interest rate, amount outstanding with counterparty | 1.17%
Line of Credit Facility, Amount Outstanding | $ 187,508
Line of Credit Facility, Interest Rate at Period End | 1.44%
Number of Counterparties with Borrowings Outstanding | 21
Available Repurchase Agreement Counterparties | 31

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- Definition Amount represents the total debt outstanding with a particular counterparty when the amount of equity at risk with that counterparty exceeds 10% of the Company's shareholders' equity. + References No definition available. + Details
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Namespace Prefix: | dx_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
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- Details
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- Definition Number of counterparties with whom the Company has borrowing agreements. + References No definition available. + Details
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Balance Type: | na
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- Definition Number of lending counterparties with whom the Company has amounts outstanding as of reporting period. + 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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- Definition Weighted average interest rate on all amounts outstanding with a particular counterparty for whom the amount of equity at risk exceeds 10% of the Company's shareholder's equity. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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