Non-controlling Interests	6 Months Ended
Non-controlling Interests	Jun. 30, 2019
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. On December 31, 2018, the Company redeemed 503,988 outstanding long term incentive plan units of the Company and exchanged them on a one-for-one basis for 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 quarter, calculated using a daily weighted average of all shares of common stock of the Company and Convertible Non-controlling Interests outstanding during the quarter. 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 June 30, 2019, the Convertible Non-controlling Interests consisted of the outstanding 521,371 OP LTIP Units and 212,000 OP Units, and represented an interest of approximately 2.4% in the Operating Partnership. As of June 30, 2019, non-controlling interests related to the outstanding 521,371 OP LTIP Units and the outstanding 212,000 OP Units was $13.9 million. Joint Venture Interests Non-controlling interests also include the interests of joint venture partners in various consolidated subsidiaries of the Company. The subsidiaries hold the Company's investments in certain commercial mortgage loans and REO. These 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. These 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 June 30, 2019, these joint venture partners' interests in subsidiaries of the Company were $16.7 million. These joint venture partners' interests are not convertible into shares of common stock of the Company or OP Units, nor are these joint venture partners entitled to receive distributions that holders of shares of common stock of the Company receive. 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. These interests consist of OP Units and OP LTIP Units. On January 1, 2013, 212,000 OP Units were purchased by the initial non-controlling interest member. On December 11, 2018, the Company issued 17,383 OP LTIP Units to certain officers of the Company. On December 31, 2018, the Company redeemed 503,988 LTIP Units and distributed 503,988 OP LTIP Units to non-controlling interest members pursuant to the Redemption Transaction. Income allocated to these non-controlling interests is based on the non-controlling interest owners' ownership percentage of the Operating Partnership during the quarter, calculated using a daily weighted average of all common shares and convertible units outstanding during the quarter. Holders of OP Units and OP LTIP Units are entitled to receive the same distributions that holders of common shares receive, and OP Units are convertible into common shares on a one-for-one basis, subject to specified limitations. Each OP LTIP Unit is convertible into an OP Unit on a one-for-one basis. OP Units and OP LTIP Units are non-voting with respect to matters as to which common shareholders are entitled to vote. As December 31, 2018, the Convertible Non-controlling Interests consisted of the outstanding 521,371 OP LTIP Units and 212,000 OP Units, and represented an interest of approximately 2.4% in the Operating Partnership. As of December 31, 2018 non-controlling interests related to the outstanding 521,371 OP LTIP Units and the outstanding 212,000 OP Units was $13.9 million. Joint Venture Interests Non-controlling interests also include the interests of joint venture partners in various consolidated subsidiaries of the Company. The subsidiaries hold the Company's investments in certain commercial mortgage loans and REO. These 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. These 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 December 31, 2018 these joint venture partners' interests in subsidiaries of the Company were $17.3 million. These joint venture partners' interests are not convertible into common shares of the Company or OP Units, nor are these joint venture partners entitled to receive distributions that holders of common shares of the Company receive.