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The remaining amount of investment discount originally recognized at the date of purchase of the instrument that has yet to be accreted.

No definition available.

Name:	dx_InvestmentsUnamortizedDiscount
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The remaining amount of investment premium originally recognized at the purchase date of the instrument that has yet to be amortized.

No definition available.

Name:	dx_InvestmentsUnamortizedPremium
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This item represents the current weighted-average gross interest rate earned on this type of MBS in the investment portfolio as of the period indicated. The gross interest rate of each MBS within the portfolio is weighted based on its current outstanding notional or par balance. The current outstanding notional or par balance for each MBS consists of the total of all principal balances remaining on the mortgage loans underlying each MBS.

No definition available.

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Notional balance for interest only securities owned by the Company and issued and guaranteed by a government sponsored entity.

No definition available.

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This item represents the difference between the amortized cost and the fair value of trading securities held as of the balance sheet date that was included in earnings for the period.

No definition available.

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This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

No definition available.

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This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

No definition available.

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For investments which are quantified by principal amount, the principle balance held at close of period.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

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The cash outflow for the purchase of securities issued by a governmental agency or corporation (for example, GNMA or FHLMC) or by private issuers (for example, banks and mortgage banking enterprises) secured by and repaid from underlying mortgages, which were designated as available for sale when acquired.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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