Related Party Transactions (Notes)	12 Months Ended
Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	RELATED PARTY TRANSACTIONSAs noted in previous filings, DCI, a former affiliate of the Company and formerly known as Dynex Commercial, Inc., was named a party to several lawsuits in 1999 and 2000 regarding the activities of DCI while it was an operating subsidiary of an affiliate of the Company. The Company was named a party to several of the lawsuits (the “DCI Litigation”) due to its affiliation with DCI. In December 2000, the Company and DCI entered into a Litigation Cost Sharing Agreement (the “Agreement”) whereby the Company agreed to advance DCI's portion of the costs of defending against the DCI Litigation. In addition, the Company advanced approximately $1,702 of legal fees related to the DCI litigation prior to the effective date of the Agreement. As discussed in Part 1, Item 3 of this Annual Report on Form 10-K, certain plaintiffs are seeking to enforce a judgment obtained against DCI against the Company under various legal theories including pursuant to the Agreement. The Company has continued to fund the costs of defense for DCI pursuant to the Agreement. DCI costs advanced by the Company are loans and bear simple interest at the rate of Prime plus 8.0% per annum subject to a maximum of 12% under Virginia law. The Company's advances to cover DCI's costs during the years ended December 31, 2019, 2018, and 2017 were $63, $307, and $30, respectively, not including interest. The total amount due to the Company under the Agreement and the amounts advanced prior to the Agreement relating to the DCI Litigation including interest was $13,272 as of December 31, 2019. Because DCI does not currently have any assets, the amount due as of December 31, 2019 has been fully reserved for collectability by the Company. DCI is currently wholly owned by a company unaffiliated with the Company. An executive of the Company is the sole shareholder of this unaffiliated company.

Related Party Transactions (Notes)

12 Months Ended

Dec. 31, 2019

RELATED PARTY TRANSACTIONSAs noted in previous filings, DCI, a former affiliate of the Company and formerly known as Dynex Commercial, Inc., was named a party to several lawsuits in 1999 and 2000 regarding the activities of DCI while it was an operating subsidiary of an affiliate of the Company. The Company was named a party to several of the lawsuits (the “DCI Litigation”) due to its affiliation with DCI. In December 2000, the Company and DCI entered into a Litigation Cost Sharing Agreement (the “Agreement”) whereby the Company agreed to advance DCI's portion of the costs of defending against the DCI Litigation. In addition, the Company advanced approximately $1,702 of legal fees related to the DCI litigation prior to the effective date of the Agreement. As discussed in Part 1, Item 3 of this Annual Report on Form 10-K, certain plaintiffs are seeking to enforce a judgment obtained against DCI against the Company under various legal theories including pursuant to the Agreement. The Company has continued to fund the costs of defense for DCI pursuant to the Agreement. DCI costs advanced by the Company are loans and bear simple interest at the rate of Prime plus 8.0% per annum subject to a maximum of 12% under Virginia law. The Company's advances to cover DCI's costs during the years ended December 31, 2019, 2018, and 2017 were $63, $307, and $30, respectively, not including interest. The total amount due to the Company under the Agreement and the amounts advanced prior to the Agreement relating to the DCI Litigation including interest was $13,272 as of December 31, 2019. Because DCI does not currently have any assets, the amount due as of December 31, 2019 has been fully reserved for collectability by the Company. DCI is currently wholly owned by a company unaffiliated with the Company. An executive of the Company is the sole shareholder of this unaffiliated company.