Non-controlling Interests	9 Months Ended
Non-controlling Interests	Sep. 30, 2023
Noncontrolling Interest [Abstract]
Non-controlling Interests	Non-controlling Interests Operating Partnership Non-controlling interests include the Convertible Non-controlling Interests in the Operating Partnership owned by an affiliate of our Manager, our directors, and certain current and former Ellington employees and their related parties in the form of OP LTIP Units. Income allocated to Convertible Non-controlling Interests is based on the non-controlling interest owners' ownership percentage of the Operating Partnership during the period, calculated using a daily weighted average of all shares of common stock of the Company and Convertible Non-controlling Interests outstanding during the period. Holders of Convertible Non-controlling Interests are entitled to receive the same distributions that holders of shares of common stock of the Company receive. Convertible Non-controlling Interests are non-voting with respect to matters as to which holders of common stock of the Company are entitled to vote. As of September 30, 2023, the Convertible Non-controlling Interests consisted of the outstanding 763,374 OP LTIP Units and 46,360 OP Units, and represented an interest of approximately 0.9% in the Operating Partnership. As of December 31, 2022, the Convertible Non-controlling Interests consisted of the outstanding 769,573 OP LTIP Units and 46,360 OP Units, and represented an interest of approximately 1.0% in the Operating Partnership. As of September 30, 2023 and December 31, 2022, non-controlling interests related to all outstanding Convertible Non-controlling Interests was $11.7 million and $12.4 million, respectively. Joint Venture Interests Non-controlling interests also include the interests of joint venture partners in various consolidated subsidiaries of the Company. These subsidiaries hold the Company's investments in certain commercial mortgage loans and REO. The joint venture partners participate in the income, expense, gains and losses of such subsidiaries as set forth in the related operating agreements of the subsidiaries. The joint venture partners make capital contributions to the subsidiaries as new approved investments are purchased by the subsidiaries, and are generally entitled to distributions when investments are sold or otherwise disposed of. As of September 30, 2023 and December 31, 2022, the joint venture partners' interests in subsidiaries of the Company were $9.6 million and $10.0 million, respectively. The joint venture partners' interests are not convertible into shares of common stock of the Company or OP Units, nor are the joint venture partners entitled to receive distributions that holders of shares of common stock of the Company receive. Non-Controlling Interests in Longbridge As of September 30, 2023 and December 31, 2022, the Company owned 99.6% and 99.5%, respectively, of Longbridge; the remainder relates to units held by various executives at Longbridge (the "Longbridge Executive Unit Holders") and stock options issued to various Longbridge employees (collectively, the "Longbridge Minority Holders"). Units held by the Longbridge Executive Unit Holders and exercised stock options participate in the income, expense, gains and losses of Longbridge but do not participate in the income, expense, gains and losses of the Operating Partnership. The Longbridge Minority Holders' interests are not convertible into shares of common stock of the Company or OP Units, nor are the Longbridge Minority Holders' entitled to receive distributions that holders of shares of common stock of the Company receive. Total expense associated with such options is presented under Compensation and benefits on the Statement of Operations. As of both September 30, 2023 and December 31, 2022, the Longbridge Minority Holders' interests in Longbridge were $2.4 million.