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Organization and Summary of Significant Accounting Policies (Policies) | 3 Months Ended
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Mar. 31, 2020
Accounting Policies [Abstract] |
Organization [Text Block] | OrganizationDynex Capital, Inc. (“Company”) was incorporated in the Commonwealth of Virginia on December 18, 1987 and commenced operations in February 1988. The Company is an internally managed mortgage real estate investment trust, or mortgage REIT, which primarily earns income from investing on a leveraged basis in debt securities, the majority of which are specified pools of Agency mortgage-backed securities (“MBS”) consisting of commercial MBS (“CMBS”), residential MBS (“RMBS”), and CMBS interest-only (“IO”) securities and non-Agency MBS, which consist mainly of CMBS IO. Agency MBS have a guaranty of principal payment by a U.S. government-sponsored entity (“GSE”) such as Fannie Mae and Freddie Mac which are in conservatorship and are currently supported by a senior preferred stock purchase agreement from U.S. Treasury. Non-Agency MBS are issued by non-governmental enterprises and do not have a guaranty of principal payment. 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 the Company 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; however, uncertainty over the continuing impact that COVID-19 will have on the global economy and on the Company’s business makes any estimates and assumptions as of March 31, 2020 inherently less certain than they would be absent the current and potential impacts of COVID-19. Operating results for the three months ended March 31, 2020 are not necessarily indicative of the results that may be expected for any other interim periods or for the entire year ending December 31, 2020. 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, 2019 (the “2019 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.
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” 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.
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 and fair value measurements of its investments. 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 shareholders 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 and records these liabilities, if any, to the extent they are deemed more likely than not to have been incurred.
Earnings Per Share, Policy | 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 months ended March 31, 2020 or March 31, 2019. 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 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 7.625% Series B Cumulative Redeemable Preferred Stock (the “Series B Preferred Stock”) and its 6.9000% Series C Cumulative Redeemable Preferred Stock (the “Series C Preferred Stock”) (collectively, the “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 (and subject to other circumstances) as described in Article IIIB and Article IIIC of the Company’s Articles of Amendment to the Restated Articles of Incorporation (the “Restated Articles of Incorporation, as amended”), the effect of those shares and their related dividends is excluded from the calculation of diluted net income per common share. The Company’s weighted average common shares outstanding and net loss per common share amounts presented on its consolidated statement of comprehensive income for the three months ended March 31, 2019 have been restated to reflect the effect of the 1-for-3 reverse stock split effected by the Company in June of 2019.
Cash and Cash Equivalents [Policy Text Block] | Cash and Cash Equivalents Cash and cash equivalents include highly liquid investments with original maturities of three months or less as well as unrestricted demand deposits at highly rated financial institutions. The Company’s cash balances fluctuate throughout the year and may exceed Federal Deposit Insurance Company insured limits from time to time. Although the Company bears risk to amounts in excess of those insured by the FDIC, it does not anticipate any losses as a result.
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 certain 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 March 31, 2020 that sum to the total of the same such amounts shown on the Company’s consolidated statement of cash flows for the three months ended March 31, 2020:
|  | March 31, 2020
Cash and cash equivalents |  | $ | 51,411 |
Restricted cash |  | 59,204 |
Total cash, cash equivalents, and restricted cash shown on consolidated statement of cash flows |  | $ | 110,615 |
Investment in Debt Securities, Policy | Mortgage-Backed Securities The Company’s MBS 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 MBS are reported in other comprehensive income (“OCI”) until the investment is sold or matures. 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 MBS 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 MBS 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’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 currently hold any non-Agency MBS that were purchased at a discount with credit ratings of less than ‘AA’ or not rated by any of the nationally recognized credit rating agencies at the time of purchase. 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. Please refer to Note 5 for further discussion of MBS fair value measurements. Allowance for Credit Losses. The Company recently adopted Accounting Standards Codification Topic 326, Financial Instruments - Credit Losses. On at least a quarterly basis, the Company evaluates any MBS with a fair value less than its amortized cost for credit losses. If the difference between the present value of cash flows expected to be collected on the MBS is less than its amortized cost, the difference is recorded as an allowance for credit loss through net income up to and not exceeding the amount that the amortized cost exceeds current fair value. Subsequent changes in credit loss estimates are recognized in earnings in the period in which they occur. Because the majority of the Company’s investments are higher credit quality and most are guaranteed by a GSE, the Company is not likely to have an allowance for credit losses recorded on its consolidated balance sheet.
Repurchase Agreements [Policy Text Block] | Repurchase Agreements The Company’s repurchase agreements, which are used to finance its purchases of MBS, 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 include interest rate swaps, futures, options, and forward contracts for the purchase or sale of Agency RMBS on a non-specified pool basis, commonly referred to as to-be-announced (“TBA”) securities. Derivative instruments are reported at their fair value on the Company’s consolidated balance sheet as derivative assets if in a gain position or as derivative liabilities if in a loss position, at the end of the period reported. 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 (loss). 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. Generally, the Company enters into pay-fixed interest rate swaps, which involve the receipt of variable-rate amounts from a counterparty in exchange for the Company making fixed-rate payments over the life of the interest rate swap without exchange of the underlying notional amount. From time to time the Company may also enter into receive-fixed interest rate swaps that involve the receipt of fixed-rate amounts from a counterparty in exchange for the Company making variable-rate payments over the life of the interest rate swap without exchange of the underlying notional amount. The Company’s interest rate swap agreements are centrally cleared through the Chicago Mercantile Exchange (“CME”). The Company’s CME cleared swaps require that the Company post initial margin as collateral, 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 Company may also enter into long and short positions in U.S. Treasury futures contracts. U.S. Treasury futures are valued based on exchange pricing with daily margin settlements. The Company realizes gains or losses on these contracts upon expiration at an amount equal to the difference between the current fair value of the underlying asset and the contractual price of the futures contract. Unlike interest rate swaps, the Company does not treat the daily margin exchanges for its U.S. Treasury futures as legal settlement of the instrument. The Company currently holds put options on U.S. Treasury futures which provide the Company the right, but not an obligation, to buy U.S. Treasury futures at a predetermined notional amount and stated term in the future. Put options on U.S. Treasury futures are valued based on exchange pricing without daily exchanges of margin amounts. The Company records the premium paid for the option contract as a derivative asset on its consolidated balance sheet and adjusts the balance for changes in fair value through “gain (loss) on derivative instruments” until the option is exercised or the contract expires. The Company may also purchase options for interest rate swaps (“interest rate swaptions”) which are accounted for similarly. 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 that 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 CompensationPursuant 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] | ContingenciesIn 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.
Recent Accounting Pronouncements [Text Block] | Recently Issued and Adopted Accounting Pronouncements The Company reviews all Accounting Standards Updates (“ASU”) issued by the Financial Accounting Standards Board (“FASB”) on at least a quarterly basis to evaluate applicability and significance of any impact on its financial condition and results of operations. There were no accounting pronouncements issued during the three months ended March 31, 2020 that are expected to have a material impact on the Company’s financial condition or results of operations. As of January 1, 2020, the Company elected the fair value option for its mortgage loans held for investment pursuant to the provisions of ASU No. 2019-05, Financial Instruments—Credit Losses (Topic 326) Targeted Transition Relief, which was issued in May of 2019. Management chose to elect the fair value option for its mortgage loans because the majority of the Company’s investments are represented on its consolidated balance sheet at fair value. The election of the fair value option resulted in a cumulative adjustment of $(548) to retained earnings on its consolidated balance sheet as of January 1, 2020. The Company does not expect its election of the fair value option for its mortgage loans to have a material impact on its future consolidated financial statements. In March 2020, FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional expedients and exceptions to GAAP requirements for modifications on debt instruments, leases, derivatives, and other contracts, related to the expected market transition from LIBOR, and certain other floating rate benchmark indices to alternative reference rates. ASU 2020-04 generally considers contract modifications related to reference rate reform to be an event that does not require contract remeasurement at the modification date nor a reassessment of a previous accounting determination. The guidance in ASU 2020-04 is optional and may be elected over time, through December 31, 2022, as reference rate reform activities occur. The Company does not believe this ASU will 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067 Reference 6: 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 7: 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=116821951&loc=d3e32247-109318 Reference 8: 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=116821951&loc=d3e32280-109318 Reference 9: 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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