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Organization and Summary of Significant Accounting Policies (Policies) | 6 Months Ended
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Jun. 30, 2019
Accounting Policies [Abstract] |
Organization [Text Block] | Organization Dynex Capital, Inc. (“Company”) was incorporated in the Commonwealth of Virginia on December 18, 1987 and commenced operations in February 1988. The Company primarily earns income from investing on a leveraged basis in debt securities, the majority of which are specified pools of Agency and non-Agency mortgage-backed securities (“MBS”) consisting of residential MBS (“RMBS”), commercial MBS (“CMBS”) and CMBS interest-only (“IO”) securities that are issued or guaranteed by U.S. Government sponsored agencies (“Agency MBS”) and MBS issued by others (“non-Agency MBS”). The Company also invests in other types of mortgage-related securities, such as to-be-announced securities (“TBAs” or “TBA securities”).
Basis of Presentation [Policy Text Block] | Basis of Presentation The accompanying unaudited consolidated financial statements of Dynex Capital, Inc. and its subsidiaries (together, “Dynex” or, as appropriate, the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to the Quarterly Report on Form 10-Q and Article 10, Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all significant adjustments, consisting of normal recurring accruals, considered necessary for a fair presentation of the consolidated financial statements have been included. Operating results for the three and six months ended June 30, 2019 are not necessarily indicative of the results that may be expected for any other interim periods or for the entire year ending December 31, 2019. The unaudited consolidated financial statements included herein should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (the “2018 Form 10-K”) filed with the SEC. All references to common shares, per common share amounts, and restricted stock have been adjusted to reflect the effect of the Company’s 1-for-3 reverse stock split effected on June 20, 2019 for all periods presented. Please refer to Note 6 for additional information.
Consolidation [Policy Text Block] | Consolidation and Variable Interest Entities The consolidated financial statements include the accounts of the Company and the accounts of its majority owned subsidiaries and variable interest entities (“VIE”) for which it is the primary beneficiary. All intercompany accounts and transactions have been eliminated in consolidation. The Company consolidates a VIE if the Company is determined to be the VIE’s primary beneficiary, which is defined as the party that has both: (i) the power to control the activities that most significantly impact the VIE’s financial performance and (ii) the right to receive benefits or absorb losses that could potentially be significant to the VIE. The Company reconsiders its evaluation of whether to consolidate a VIE on an ongoing basis, based on changes in the facts and circumstances pertaining to the VIE. The Company consolidates a securitization trust, which has residential mortgage loans included in “mortgage loans held for investment, net” on its consolidated balance sheet, of which a portion is pledged as collateral for one remaining bond recorded as “non-recourse collateralized financing” on its consolidated balance sheet. The Company owns the subordinate class in the trust and has been deemed the primary beneficiary. Though the Company invests in Agency and non-Agency MBS which are generally considered to be interests in VIEs, the Company does not consolidate these entities because it does not meet the criteria necessary to be deemed a primary beneficiary. Please refer to Note 2 for financial information regarding the Company’s investments in these debt securities.
Use of Estimates [Policy Text Block] | Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenue and expenses during the reported period. Actual results could differ from those estimates. The most significant estimates used by management include, but are not limited to, amortization of premiums and discounts, fair value measurements of its investments, and other-than-temporary impairments. These items are discussed further below within this note to the consolidated financial statements.
Income Taxes [Policy Text Block] | Income Taxes The Company has elected to be taxed as a real estate investment trust (“REIT”) under the Internal Revenue Code of 1986 and the corresponding provisions of state law. To qualify as a REIT, the Company must meet certain tests including investing in primarily real estate-related assets and the required distribution of at least 90% of its annual REIT taxable income to stockholders after consideration of its net operating loss (“NOL”) carryforward and not including taxable income retained in its taxable subsidiaries. As a REIT, the Company generally will not be subject to federal income tax on the amount of its income or capital gains that is distributed as dividends to shareholders. The Company assesses its tax positions for all open tax years and determines whether the Company has any material unrecognized liabilities in accordance with Accounting Standards Codification (“ASC”) Topic 740. The Company records these liabilities, if any, to the extent they are deemed more likely than not to have been incurred.
Net Income (Loss) Per Common Share [Text Block] | Net Income (Loss) Per Common Share The Company calculates basic net income per common share by dividing net income to common shareholders for the period by weighted-average shares of common stock outstanding for that period. The Company did not have any potentially dilutive securities outstanding during the three and six months ended June 30, 2019 or June 30, 2018. Holders of unvested shares of the Company’s issued and outstanding restricted common stock are eligible to receive non-forfeitable dividends. As such, these unvested shares are considered participating securities as per ASC Topic 260-10 and therefore are included in the computation of basic net income per common share using the two-class method. Upon vesting, restrictions on transfer expire on each share of restricted stock, and each such share of restricted stock represents one unrestricted share of common stock. Because the Company’s 8.50% Series A Cumulative Redeemable Preferred Stock (the “Series A Preferred Stock”) and 7.625% Series B Cumulative Redeemable Preferred Stock (the “Series B Preferred Stock”) are redeemable at the Company’s option for cash only and may convert into shares of common stock only upon a change of control of the Company, the effect of those shares and their related dividends is excluded from the calculation of diluted net income per common share. On June 20, 2019, the Company effected a 1-for-3 reverse stock split of its common stock whereby every three common shares issued and outstanding as of the close of market on that date were converted into one common share. The Company’s weighted average common shares outstanding and net income (loss) per common share amounts presented on its consolidated statements of comprehensive income (loss) have been restated to reflect the effect of the reverse stock split for all periods presented. Please refer to Note 6 for additional information about the Company’s reverse stock split.
Cash and Cash Equivalents [Policy Text Block] | Cash and Cash Equivalents Cash and cash equivalents include cash on hand and highly liquid investments with original maturities of three months or less.
Restricted Cash [Policy Text Block] | Restricted Cash Restricted cash consists of cash the Company has pledged to cover initial and variation margin with its financing and derivative counterparties. The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported on the Company's consolidated balance sheet as of June 30, 2019 that sum to the total of the same such amounts shown on the Company’s consolidated statement of cash flows for the six months ended June 30, 2019:
|  | June 30, 2019
Cash and cash equivalents |  | $ | 49,956 |
Restricted cash |  | 61,394 |
Total cash, cash equivalents, and restricted cash shown on consolidated statement of cash flows |  | $ | 111,350 |
Investments in Debt Securities [Policy Text Block] | Investments in Debt Securities The Company’s investments in debt securities are designated as available-for-sale (“AFS”) and are recorded at fair value on the Company’s consolidated balance sheet. Changes in unrealized gain (loss) on the Company’s debt securities are reported in other comprehensive income (“OCI”) until the investment is sold, matures, or is determined to be other than temporarily impaired. Although the Company generally intends to hold its AFS securities until maturity, it may sell any of these securities as part of the overall management of its business. Upon the sale of an AFS security, any unrealized gain or loss is reclassified out of accumulated other comprehensive income (“AOCI”) into net income as a realized “gain (loss) on sale of investments, net” using the specific identification method. The fair value of the Company’s debt securities pledged as collateral against repurchase agreements is disclosed parenthetically on the Company’s consolidated balance sheets. Interest Income, Premium Amortization, and Discount Accretion. Interest income on debt securities is accrued based on the outstanding principal balance (or notional balance in the case of interest-only, or “IO”, securities) and their contractual terms. Premiums or discounts associated with the purchase of Agency MBS as well as any non-Agency MBS rated ‘AA’ and higher are amortized or accreted into interest income over the projected life of such securities using the effective yield method, and adjustments to premium amortization and discount accretion are made for actual cash payments. The Company may also adjust premium amortization and discount accretion for changes in projected future cash payments. The Company’s projections of future cash payments are based on input and analysis received from external sources and internal models and include assumptions about the amount and timing of loan prepayment rates, fluctuations in interest rates, credit losses, and other factors. On at least a quarterly basis, the Company reviews and makes any necessary adjustments to its cash flow projections and updates the yield recognized on these assets. The Company does not estimate future prepayments on its fixed-rate Agency RMBS. The Company holds certain non-Agency MBS that had credit ratings of less than ‘AA’ at the time of purchase or were not rated by any of the nationally recognized credit rating agencies. A portion of these non-Agency MBS were purchased at discounts to their par value, which management does not believe to be substantial. The discount is accreted into income over the security’s expected life based on management’s estimate of the security’s projected cash flows. Future changes in the timing of projected cash flows or differences arising between projected cash flows and actual cash flows received may result in a prospective change in the effective yield on those securities. Determination of MBS Fair Value. The Company estimates the fair value of the majority of its MBS based upon prices obtained from third-party pricing services and broker quotes. The remainder of the Company’s MBS are valued by discounting the estimated future cash flows derived from cash flow models that utilize information such as the security’s coupon rate, estimated prepayment speeds, expected weighted average life, collateral composition, estimated future interest rates, expected losses, and credit enhancements as well as certain other relevant information. Refer to Note 5 for further discussion of MBS fair value measurements. Other-than-Temporary Impairment. An MBS is considered impaired when its fair value is less than its amortized cost. The Company evaluates all of its impaired MBS for other-than-temporary impairments (“OTTI”) on at least a quarterly basis. An impairment is considered other-than-temporary if: (1) the Company intends to sell the MBS; (2) it is more likely than not that the Company will be required to sell the MBS before its fair value recovers; or (3) the Company does not expect to recover the full amortized cost basis of the MBS. If either of the first two conditions is met, the entire amount of the impairment is recognized in earnings. If the impairment is solely due to the inability to fully recover the amortized cost basis, the security is further analyzed to quantify any credit loss, which is the difference between the present value of cash flows expected to be collected on the MBS and its amortized cost. The credit loss, if any, is then recognized in earnings, while the balance of impairment related to other factors is recognized in other comprehensive income. Following the recognition of an OTTI through earnings, a new cost basis is established for the security. Any subsequent recoveries in fair value may be accreted back into the amortized cost basis of the MBS on a prospective basis through interest income. Please see Note 2 for additional information related to the Company’s evaluation for OTTI.
Repurchase Agreements [Policy Text Block] | Repurchase Agreements The Company’s repurchase agreements, which are used to finance its purchases of debt securities, are accounted for as secured borrowings under which the Company pledges its securities as collateral to secure a loan, which is equal in value to a specified percentage of the estimated fair value of the pledged collateral. The Company retains beneficial ownership of the pledged collateral. At the maturity of a repurchase agreement, the Company is required to repay the loan and concurrently receives back its pledged collateral from the lender or, with the consent of the lender, the Company may renew the agreement at the then prevailing financing rate. A repurchase agreement lender may require the Company to pledge additional collateral in the event of a decline in the fair value of the collateral pledged. Repurchase agreement financing is recourse to the Company and the assets pledged. Most of the Company’s repurchase agreements are based on the September 1996 version of the Bond Market Association Master Repurchase Agreement, which generally provides that the lender, as buyer, is responsible for obtaining collateral valuations from a generally recognized source agreed to by both the Company and the lender, or, in an instance when such source is not available, the value determination is made by the lender.
Derivative Instruments [Policy Text Block] | Derivative Instruments The Company’s derivative instruments generally include interest rate swaps, futures, and forward contracts for the purchase or sale of non-specified Agency RMBS, commonly referred to as “TBA securities” or “TBA contracts”. Derivative instruments are accounted for at the fair value of their unit of account. Derivative instruments in a gain position are reported as derivative assets and derivative instruments in a loss position are reported as derivative liabilities on the Company’s consolidated balance sheet. All periodic interest benefits/costs and changes in fair value of derivative instruments, including gains and losses realized upon termination, maturity, or settlement are recorded in “gain (loss) on derivative instruments, net” on the Company’s consolidated statement of comprehensive income. Cash receipts and payments related to derivative instruments are classified in the investing activities section of the consolidated statements of cash flows in accordance with the underlying nature or purpose of the derivative transactions. The Company’s interest rate swap agreements are privately negotiated in the over-the-counter (“OTC”) market. As of June 30, 2019, all of these agreements are centrally cleared through the Chicago Mercantile Exchange (“CME”). The Company’s CME cleared swaps require that the Company post initial margin as determined by the CME, and in addition, variation margin is exchanged, typically in cash, for changes in the fair value of the CME cleared swaps. The exchange of variation margin for CME cleared swaps is legally considered to be the settlement of the derivative itself as opposed to a pledge of collateral. Accordingly, the Company accounts for the daily exchange of variation margin associated with its CME cleared interest rate swaps as a direct increase or decrease to the carrying value of the related derivative asset or liability. The carrying value of derivative instruments on the Company’s consolidated balance sheet as of December 31, 2018 is the unsettled fair value of the instruments subject to bilateral agreements and not centrally cleared through the CME as of that date. A TBA security is a forward contract (“TBA contract”) for the purchase (“long position”) or sale (“short position”) of a non-specified Agency MBS at a predetermined price with certain principal and interest terms and certain types of collateral, but the particular Agency securities to be delivered are not identified until shortly before the settlement date. The Company accounts for long and short positions in TBAs as derivative instruments because the Company cannot assert that it is probable at inception and throughout the term of an individual TBA transaction that its settlement will result in physical delivery of the underlying Agency RMBS, or the individual TBA transaction will not settle in the shortest time period possible. Please refer to Note 4 for additional information regarding the Company’s derivative instruments as well as Note 5 for information on how the fair value of these instruments are calculated.
Share-based Compensation [Policy Text Block] | Share-Based Compensation Pursuant to the Company’s 2018 Stock and Incentive Plan (“2018 Plan”), the Company may grant share-based compensation to eligible employees, non-employee directors or consultants or advisors to the Company, including restricted stock awards, stock options, stock appreciation rights, performance units, restricted stock units, and performance cash awards. The Company’s restricted stock currently issued and outstanding may be settled only in shares of its common stock, and therefore are treated as equity awards with their fair value measured at the grant date and recognized as compensation cost over the requisite service period with a corresponding credit to shareholders’ equity. The requisite service period is the period during which a participant is required to provide service in exchange for an award, which is equivalent to the vesting period specified in the terms of the time-based restricted stock award. None of the Company’s restricted stock awards have performance-based conditions. The Company does not currently have any share-based compensation issued or outstanding other than restricted stock issued to its employees, officers, and directors.
Contingencies [Policy Text Block] | Contingencies In the normal course of business, there may be various lawsuits, claims, and other contingencies pending against the Company. On a quarterly basis, the Company evaluates whether to establish provisions for estimated losses from those matters. The Company recognizes a liability for a contingent loss when: (a) the underlying causal event has occurred prior to the balance sheet date; (b) it is probable that a loss has been incurred; and (c) there is a reasonable basis for estimating that loss. A liability is not recognized for a contingent loss when it is only possible or remotely possible that a loss has been incurred, however, possible contingent losses shall be disclosed. If the contingent loss (or an additional loss in excess of any accrual) is at least a reasonable possibility and material, then the Company discloses a reasonable estimate of the possible loss or range of loss, if such reasonable estimate can be made. If the Company cannot make a reasonable estimate of the possible material loss, or range of loss, then that fact is disclosed.
New Accounting Pronouncements and Changes in Accounting Principles [Text Block] | Recent Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-13, Financial Instruments - Credit Losses, which replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. For assets measured at amortized cost, the amendments in this ASU eliminate the probable initial recognition threshold in current GAAP and broaden the information that an entity must consider in developing its expected credit loss estimate to include the use of forecasted information. For assets classified as available-for-sale with changes in fair value recorded in other comprehensive income, measurement of credit losses will be similar to current GAAP. However, the amendments in this ASU require that credit losses be presented as an allowance rather than as a write-down, which is referred to in current GAAP as an other-than-temporary impairment. An entity will be able to record reversals of credit losses, if credit loss estimates decline, in net income for the current period. The amendments in this ASU will not permit an entity to use the length of time a debt security has been in an unrealized loss position to avoid recording a credit loss and removes the requirements to consider historical and implied volatility of the fair value of a security as well as recoveries or declines in fair value after the balance sheet date. The amendments in this ASU will affect an entity by varying degrees depending on a number of factors, including but not limited to, the credit quality of the assets held by the entity, their duration, and how the entity applies current GAAP. These amendments will become effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. An entity will apply the amendments in this ASU through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. Though the Company has not fully completed evaluating the impact this ASU will have on its financial condition and results of operations, the Company does not expect it will have a material impact given that the majority of its investments are Agency MBS. In May 2019, FASB issued ASU No. 2019-05, Financial Instruments—Credit Losses (Topic 326) Targeted Transition Relief, which provides entities that have certain instruments within the scope of Subtopic 326-20, Financial Instruments—Credit Losses— Measured at Amortized Cost, with an option to irrevocably elect the fair value option in Subtopic 825-10, Financial Instruments—Overall, applied on an instrument-by-instrument basis for eligible instruments except for held-to-maturity debt securities, upon adoption of Topic 326. An entity that elects the fair value option should subsequently apply the guidance in Subtopics 820-10, Fair Value Measurement—Overall, and 825-10. For entities that have not yet adopted the amendments in ASU NO. 2016-13, the effective date and transition methodology for the amendments in ASU No. 2019-05 are the same as in ASU 2016-13. For entities that have adopted the amendments in ASU No. 2016-13, the amendments in ASU No. 2019-05 are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted in any interim period as long as an entity has adopted the amendments in ASU No. 2016-13. The amendments in ASU No. 2019-05 should be applied on a modified-retrospective basis by means of a cumulative-effect adjustment to the opening balance of retained earnings balance in the statement of financial position as of the date that an entity adopts the amendments in ASU No. 2016-13. The Company has mortgage loans held for investment which are measured at amortized cost which are eligible for the option to irrevocably elect the fair value option. Though the Company is evaluating its options, it does not expect adoption of ASU No. 2019-05 to have a material impact on its consolidated financial statements.

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- Definition Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 740 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 17 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32247-109318 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32280-109318 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 05 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65884525&loc=d3e40913-109327 + Details
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- Definition Disclosure of accounting policy for stock option and stock incentive plans. This disclosure may include (1) the types of stock option or incentive plans sponsored by the entity (2) the groups that participate in (or are covered by) each plan (3) significant plan provisions and (4) how stock compensation is measured, and the methodologies and significant assumptions used to determine that measurement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(f) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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