0001514281 2020-08-14 2020-08-14 0001514281 us-gaap:CommonStockMember 2020-08-14 2020-08-14 0001514281 mitt:SeriesCumulativeReedmablePreferredStockMember 2020-08-14 2020-08-14 0001514281 mitt:SeriesBCumulativeReedmablePreferredStockMember 2020-08-14 2020-08-14 0001514281 mitt:SeriesCFixedToFloatingRateCumulativeRedeemablePreferredMember 2020-08-14 2020-08-14 false 0001514281 8-K 2020-08-14 AG Mortgage Investment Trust, Inc. MD 001-35151 27-5254382 245 Park Avenue 26th floor New York NY 10167 212 692-2000 false false false false Common Stock, $0.01 par value per share MITT NYSE 8.25% Series A Cumulative Redeemable Preferred Stock MITT PrA NYSE 8.00% Series B Cumulative Redeemable Preferred Stock MITT PrB NYSE 8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock MITT PrC NYSE false