XML 53 R12.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Offsetting Assets and Liabilities (Notes) | 9 Months Ended
--- | ---
Sep. 30, 2013
Offsetting Assets and Liabilities [Abstract] |
Schedule of Derivative Instruments Offsetting Assets and Liabilities [Table Text Block] | OFFSETTING ASSETS AND LIABILITIES The Company's derivatives and repurchase agreements are subject to underlying agreements with master netting or similar arrangements, which provide for the right of offset in the event of default or in the event of bankruptcy of either party to the transactions. The Company reports its assets and liabilities subject to these arrangements on a gross basis. The following tables present information regarding those assets and liabilities subject to such arrangements as if the Company had presented them on a net basis as of September 30, 2013 and December 31, 2012:
| Offsetting of Assets
| Gross Amount of Recognized Assets |  | Gross Amount Offset in the Balance Sheet |  | Net Amount of Assets Presented in the Balance Sheet |  | Gross Amount Not Offset in the Balance Sheet |  | Net Amount
Financial Instruments Received as Collateral |  | Cash Received as Collateral
September 30, 2013 |  |  |  |  |  |  |  |  |  |  |
Derivative assets | $ | 12,908 |  |  | $ | — |  |  | $ | 12,908 |  |  | $ | (1,689 | ) |  | $ | (11,219 | ) |  | $ | — |
December 31, 2012: |  |  |  |  |  |  |  |  |  |  |
Derivative assets | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Offsetting of Liabilities
| Gross Amount of Recognized Liabilities |  | Gross Amount Offset in the Balance Sheet |  | Net Amount of Liabilities Presented in the Balance Sheet |  | Gross Amount Not Offset in the Balance Sheet |  | Net Amount
Financial Instruments Posted as Collateral |  | Cash Posted as Collateral
September 30, 2013 |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities | $ | 20,837 |  |  | $ | — |  |  | $ | 20,837 |  |  | $ | (20,175 | ) |  | $ | (490 | ) |  | $ | 172 |
Repurchase agreements | 3,674,850 |  |  | — |  |  | 3,674,850 |  |  | (3,674,850 | ) |  | — |  |  | — |
| $ | 3,695,687 |  |  | $ | — |  |  | $ | 3,695,687 |  |  | $ | (3,695,025 | ) |  | $ | (490 | ) |  | $ | 172 |
December 31, 2012: |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities | $ | 42,537 |  |  | $ | — |  |  | $ | 42,537 |  |  | $ | (42,499 | ) |  | $ | (38 | ) |  | $ | — |
Repurchase agreements | 3,564,128 |  |  | — |  |  | 3,564,128 |  |  | (3,564,128 | ) |  | — |  |  | — |
| $ | 3,606,665 |  |  | $ | — |  |  | $ | 3,606,665 |  |  | $ | (3,606,627 | ) |  | $ | (38 | ) |  | $ | — |
(1) Amount disclosed for collateral received by or posted to the same counterparty include cash and the fair value of MBS up to and not exceeding the net amount of the asset or liability presented in the balance sheet. The fair value of the actual collateral received by or posted to the same counterparty may exceed the amounts presented.

X
- Details
Name: | dx_OffsettingAssetsandLiabilitiesAbstract
Namespace Prefix: | dx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of derivative and other financial assets and liabilities that are subject to offsetting under master netting or similar arrangements, including amounts not offset in presentation of the financial statements. + References No definition available. + Details
Name: | dx_ScheduleofDerivativeInstrumentsOffsettingAssetsandLiabilitiesTableTextBlock
Namespace Prefix: | dx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration