Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings. From time to time, we may be involved in various claims and legal actions arising in the ordinary course of business. On June 28, 2018, AmBase Corporation, 111 West 57th Street Manager Funding LLC and 111 West 57th Investment LLC commenced an action captioned AmBase Corporation et al v. ACREFI Mortgage Lending, LLC et al (No 653251/2018) in New York Supreme Court. The complaint names as defendants (i) ACREFI Mortgage Lending, LLC, a subsidiary of the Company, (ii) the Company, and (iii) certain funds managed by Apollo, which are co-lenders on a mezzanine loan against the development of a residential condominium building in Manhattan, New York. The plaintiffs allege that the defendants tortiously interfered with the contractual equity put right in the plaintiffs’ joint venture agreement with the developers of the project, and that the defendants aided and abetted breaches of fiduciary duty by the developers of the project. The plaintiffs allege the loss of a $70.0 million investment as part of total damages of $700.0 million, which includes punitive damages. The defendants' motion to dismiss was granted on October 23, 2019 and the Court entered judgment dismissing the complaint in its entirety on November 8, 2019. Plaintiffs filed a timely notice of appeal on December 6, 2019 and, as of September 28, 2020, the parties have now fully briefed the appeal. We are awaiting scheduling of oral argument. We continue to believe plaintiffs’ claims are without merit and do not believe this will have a material adverse effect on our consolidated financial statements. Loan Commitments. As described in "Note 4 - Commercial Mortgage, Subordinate Loans and Other Lending Assets, Net" at December 31, 2020, we had $1.4 billion of unfunded commitments related to our commercial mortgage and subordinate loans. The timings and amounts of fundings are uncertain as these commitments relate to loans for construction costs, capital expenditures, leasing costs, interest and carry costs, among others. As such, the timings and amounts of future fundings depend on the progress and performance of the underlying assets of our loans. Certain of our lenders are contractually obligated to fund their ratable portion of these loan commitments over time, while other lenders have some degree of discretion over future loan funding obligations. The total unfunded commitment is expected to be funded over the remaining 4.0 years weighted average tenor of these loans. COVID-19. The COVID-19 global pandemic has brought forth uncertainty and disruption to the global economy. The magnitude and duration of the COVID-19 pandemic and its impact on our borrowers and their tenants, cash flows and future results of operations could be significant and will largely depend on future developments, which are highly uncertain and cannot be predicted, including new information which may emerge concerning the severity of the COVID-19 pandemic, the success of actions taken to contain or treat the pandemic, and reactions by consumers, companies, governmental entities and capital markets. The prolonged duration and impact of the COVID-19 pandemic could materially disrupt our business operations and impact our financial performance. As of December 31, 2020, we have not recorded any contingencies on our consolidated balance sheet related to COVID-19. To the extent COVID-19 continues to cause dislocations in the global economy, our financial condition, results of operations, and cash flows may continue to be adversely impacted. Refer to “Note 2 - Summary of Significant Accounting Policies” for further discussion regarding COVID-19.