XML 58 R10.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Non Agency MBS | 9 Months Ended
--- | ---
Sep. 30, 2012
NON AGENCY MBS [Abstract] |
Non Agency MBS | NON-AGENCY MBS The following table presents the components of the Company’s non-Agency MBS as of September 30, 2012 and December 31, 2011:
| September 30, 2012
| RMBS |  | CMBS |  | CMBS IO (1) |  | Total
Principal/par value | $ | 15,007 |  |  | $ | 452,975 |  |  | $ | — |  |  | $ | 467,982 |
Unamortized premium | — |  |  | 2,726 |  |  | 93,096 |  |  | 95,822 |
Unamortized discount | (812 | ) |  | (20,732 | ) |  | — |  |  | (21,544 | )
Amortized cost | 14,195 |  |  | 434,969 |  |  | 93,096 |  |  | 542,260 |
Gross unrealized gains | 470 |  |  | 41,507 |  |  | 4,317 |  |  | 46,294 |
Gross unrealized losses | (424 | ) |  | (1,194 | ) |  | (5 | ) |  | (1,623 | )
Fair value | $ | 14,241 |  |  | $ | 475,282 |  |  | $ | 97,408 |  |  | $ | 586,931 |
Weighted average coupon | 4.38 | % |  | 4.64 | % |  | 0.69 | % |  |
(1) | The combined notional balance for the non-Agency CMBS IO securities is $2,252,064 as of September 30, 2012.
| December 31, 2011
| RMBS |  | CMBS |  | CMBS IO (1) |  | Total
Principal/par value | $ | 17,119 |  |  | $ | 359,853 |  |  | $ | — |  |  | $ | 376,972 |
Unamortized premium | — |  |  | 3,646 |  |  | 51,239 |  |  | 54,885 |
Unamortized discount | (1,003 | ) |  | (17,511 | ) |  | — |  |  | (18,514 | )
Amortized cost | 16,116 |  |  | 345,988 |  |  | 51,239 |  |  | 413,343 |
Gross unrealized gains | 507 |  |  | 11,806 |  |  | 893 |  |  | 13,206 |
Gross unrealized losses | (1,353 | ) |  | (3,724 | ) |  | (376 | ) |  | (5,453 | )
Fair value | $ | 15,270 |  |  | $ | 354,070 |  |  | $ | 51,756 |  |  | $ | 421,096 |
Weighted average coupon | 4.41 | % |  | 5.91 | % |  | 1.24 | % |  |
(1) | The combined notional balance for the non-Agency CMBS IO securities is $906,202 as of December 31, 2011.
All of the Company’s non-Agency MBS are designated as available-for-sale and are comprised primarily of investment-grade rated securities. The Company has purchased $7,500 on non-Agency RMBS, $120,697 of non-Agency CMBS since December 31, 2011. In addition, the Company paid premiums of $48,812 for non-Agency CMBS IO securities. The following table presents certain information for those non-Agency MBS that were in an unrealized loss position as of September 30, 2012 and December 31, 2011:
| September 30, 2012 |  | December 31, 2011
| Fair Value |  | Unrealized Loss |  | # of Securities |  | Fair Value |  | Unrealized Loss |  | # of Securities
Unrealized loss position for: |  |  |  |  |  |  |  |  |  |  |
Less than one year: | $ | 4,351 |  |  | $ | (120 | ) |  | 3 |  | $ | 153,974 |  |  | $ | (5,075 | ) |  | 6
One year or more: | 11,700 |  |  | (1,504 | ) |  | 9 |  | 2,993 |  |  | (379 | ) |  | 7
| $ | 16,051 |  |  | $ | (1,624 | ) |  | 12 |  | $ | 156,967 |  |  | $ | (5,454 | ) |  | 13
The Company reviews any non-Agency MBS in an unrealized loss position to evaluate whether any decline in fair value represents an other-than-temporary impairment. The evaluation includes a review of the credit ratings of these non-Agency MBS and the seasoning of the mortgage loans collateralizing these securities as well as the estimated future cash flows which include projected losses. The Company performed this evaluation for the non-Agency MBS in an unrealized loss position as of September 30, 2012 and has determined that there have not been any adverse changes in the timing or amount of estimated future cash flows that necessitate a recognition of other-than-temporary impairment amounts as of September 30, 2012.

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

X
- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 3, 19, 20, 21, 22, 137 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
Name: | us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration