Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On March 25, 2020, the SEC issued an order (the “Order”) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), extending the deadlines for filing certain reports made under the Exchange Act, including quarterly reports on Form 10-Q, for registrants subject to the reporting obligations under the Exchange Act that have been particularly impacted by the pandemic and which reports have filing deadlines between March 1 and July 31, 2020. In a Current Report on Form 8-K filed on May 7, 2020, we disclosed our reliance on the Order with respect to this Quarterly Report on Form 10-Q for the three months ended March 31, 2020 (the “Form 10-Q”). We are relying on the Order because, in light of the pandemic, non-essential businesses in the State of California have been closed by the state’s governor’s order, as a result of which our personnel, our auditors, and our other advisors have generally been required to work and communicate remotely, which has slowed their ability to complete preparation and review of the Form 10-Q. Additional information regarding the impact of on our business, operations, and financial results is included in Part II, Item 1A of this Form 10-Q under the heading “Risk Factors.” The pandemic has had serious and adverse consequences on business conditions in North America, the principal geographic area in which we invest, and elsewhere around the globe, including limitations on travel, transportation, education, production of goods, provision of services and business operations generally. Further, the equity and credit markets have experienced significant volatility, and it is uncertain how long this volatility will continue. Although the long-term economic fallout of the pandemic is difficult to predict, the challenging business and market conditions we currently face have had and may continue to have adverse effects on our financial performance and, as a result, may adversely impact valuations of our residential loans, securities, and other investments in future periods. If the continued economic fallout is severe and/or extended, the adverse impacts may be material. Continuing our efforts to reduce our outstanding debt and leverage, and to generate additional liquidity, between April 1, 2020 and May 13, 2020, we settled sales of residential mortgage loans for aggregate proceeds of approximately $1.8 billion and repaid approximately $1.5 billion of associated borrowings. Additionally, as of May 13, 2020, we had entered into agreements to sell residential mortgage loans with a principal balance of $203 million, which transactions are expected to settle during the second quarter of 2020, subject to customary closing conditions. Additionally, subsequent to March 31, 2020, we have also reduced our exposure to marginable borrowing facilities (which may be subject to margin calls if the value of the assets securing borrowings declines), by entering into two new non-marginable borrowing facilities and transferring residential loans and business purpose loans previously financed on marginable facilities onto these new non-marginable facilities. As a result of these activities, in the coming weeks, we expect to have sold or refinanced substantially all of the remaining assets financed through our FHLBC facility and to have substantially repaid our borrowings under this facility.