Commitments and Contingencies	6 Months Ended
Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings. From time to time, the Company 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, who 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 Company believes the claims are without merit and will vigorously defend the case. On January 4, 2017, the United States Department of Justice served a Request for Information and Documents (the “Request”) on the Company, in connection with a preliminary investigation into certain aspects of the Company's former residential real estate portfolio, which the Company acquired in connection with the merger of Apollo Residential Mortgage, Inc. with and into the Company and subsequently sold in 2016. The Request sought a range of information in connection with the residential real estate portfolio, including, among other things, information concerning policies, procedures, and practices related to advertising, marketing, identifying, or acquiring residential properties for sale or rent, and various data for all rental and sales contracts executed since January 1, 2012. The Company fully cooperated with the Department of Justice, and was advised, by a letter dated May 2, 2018, that the Department of Justice did not intend to take any further actions in this matter as it relates to the Company. Loan Commitments. As described in "Note 5 - Commercial Mortgage and Subordinate Loans, Net," at June 30, 2018, the Company had $818.1 million of unfunded commitments related to its commercial mortgage and subordinate loan portfolios.

Commitments and Contingencies

Legal Proceedings. From time to time, the Company 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, who 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 Company believes the claims are without merit and will vigorously defend the case.

On January 4, 2017, the United States Department of Justice served a Request for Information and Documents (the “Request”) on the Company, in connection with a preliminary investigation into certain aspects of the Company's former residential real estate portfolio, which the Company acquired in connection with the merger of Apollo Residential Mortgage, Inc. with and into the Company and subsequently sold in 2016. The Request sought a range of information in connection with the residential real estate portfolio, including, among other things, information concerning policies, procedures, and practices related to advertising, marketing, identifying, or acquiring residential properties for sale or rent, and various data for all rental and sales contracts executed since January 1, 2012. The Company fully cooperated with the Department of Justice, and was advised, by a letter dated May 2, 2018, that the Department of Justice did not intend to take any further actions in this matter as it relates to the Company.

Loan Commitments. As described in "Note 5 - Commercial Mortgage and Subordinate Loans, Net," at June 30, 2018, the Company had $818.1 million of unfunded commitments related to its commercial mortgage and subordinate loan portfolios.