Commitments and Contingencies	9 Months Ended
Sep. 30, 2016
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. After the announcement of the execution of the Merger Agreement, two putative class action lawsuits challenging the proposed First Merger (as defined in the Merger Agreement), captioned Aivasian v. Apollo Residential Mortgage, Inc., et al., No. 24-C-16-001532 and Wiener v. Apollo Residential Mortgage, Inc., et al., No. 24-C-16-001837, were filed in the Circuit Court for Baltimore City, (the “Court”). A putative class and derivative lawsuit was later filed in the Court captioned Crago v. Apollo Residential Mortgage, Inc., No. 24-C-16-002610. Following a hearing on May 6, 2016, the Court entered orders among other things, consolidating the three actions under the caption In Re Apollo Residential Mortgage, Inc. Shareholder Litigation, Case No.: 24-C-16-002610. The plaintiffs have designated the Crago complaint as the operative complaint. The operative complaint includes both direct and derivative claims, names as defendants AMTG, the board of directors of AMTG (the “AMTG Board”), ARI, Merger Sub, Apollo and Athene and alleges, among other things, that the members of the AMTG Board breached their fiduciary duties to the AMTG stockholders and that the other corporate defendants aided and abetted such fiduciary breaches. The operative complaint further alleges, among other things, that the proposed First Merger involves inadequate consideration, was the result of an inadequate and conflicted sales process, and includes unreasonable deal protection devices that purportedly preclude competing offers. It also alleges that the transactions with Athene are unfair and that the registration statement on Form S-4 filed with the SEC on April 6, 2016 contains materially misleading disclosures and omits certain material information. The operative complaint seeks, among other things, certification of the proposed class, declaratory relief, preliminary and permanent injunctive relief, including enjoining or rescinding the First Merger, unspecified damages, and an award of other unspecified attorneys’ and other fees and costs. On May 6, 2016, counsel for the plaintiffs filed with the Court a stipulation seeking the appointment of interim co-lead counsel, which stipulation was approved by the Court on June 9, 2016. On August 18, 2016, the defendants filed motions to dismiss the consolidated action, and the plaintiffs filed an opposition brief on October 6, 2016. The Company believes that the claims asserted in the complaints are without merit and intend to vigorously defend the lawsuits. Bremer Kreditbank AG. In September 2013, the Company, together with other affiliates of Apollo, reached an agreement to make an investment in an entity that agreed to acquire a minority participation in Bremer Kreditbank AG (“BKB”). The Company committed to invest up to approximately €38,000 (or $50,000), representing approximately 21% of the ownership in BKB. In September 2014, the Company, through a wholly owned subsidiary, acquired a 59% ownership interest in Champ LP following which a wholly-owned subsidiary of Champ LP then acquired a 35% ownership interest in BKB. In February 2015, the Company sold approximately 48% of its ownership interest in Champ LP at cost to an account managed by Apollo for approximately €16,314 (or $20,794). In June 2016, the Company transferred €427 of its unfunded commitment to Apollo, reducing its unfunded commitment to Champ LP to €2,802 (or $3,149). Through its interest in Champ LP, the Company now holds an indirect ownership interest of approximately 9.34% in BKB. Loan Commitments. As described in "Note 5 - Commercial Mortgage Loans" and "Note 6 - Subordinate Loans," respectively, at September 30, 2016, the Company had $173,680 of unfunded commitments related to its commercial mortgage loan portfolio and subordinate loan portfolio.

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.

After the announcement of the execution of the Merger Agreement, two putative class action lawsuits challenging the proposed First Merger (as defined in the Merger Agreement), captioned Aivasian v. Apollo Residential Mortgage, Inc., et al., No. 24-C-16-001532 and Wiener v. Apollo Residential Mortgage, Inc., et al., No. 24-C-16-001837, were filed in the Circuit Court for Baltimore City, (the “Court”). A putative class and derivative lawsuit was later filed in the Court captioned Crago v. Apollo Residential Mortgage, Inc., No. 24-C-16-002610. Following a hearing on May 6, 2016, the Court entered orders among other things, consolidating the three actions under the caption In Re Apollo Residential Mortgage, Inc. Shareholder Litigation, Case No.: 24-C-16-002610. The plaintiffs have designated the Crago complaint as the operative complaint. The operative complaint includes both direct and derivative claims, names as defendants AMTG, the board of directors of AMTG (the “AMTG Board”), ARI, Merger Sub, Apollo and Athene and alleges, among other things, that the members of the AMTG Board breached their fiduciary duties to the AMTG stockholders and that the other corporate defendants aided and abetted such fiduciary breaches. The operative complaint further alleges, among other things, that the proposed First Merger involves inadequate consideration, was the result of an inadequate and conflicted sales process, and includes unreasonable deal protection devices that purportedly preclude competing offers. It also alleges that the transactions with Athene are unfair and that the registration statement on Form S-4 filed with the SEC on April 6, 2016 contains materially misleading disclosures and omits certain material information. The operative complaint seeks, among other things, certification of the proposed class, declaratory relief, preliminary and permanent injunctive relief, including enjoining or rescinding the First Merger, unspecified damages, and an award of other unspecified attorneys’ and other fees and costs. On May 6, 2016, counsel for the plaintiffs filed with the Court a stipulation seeking the appointment of interim co-lead counsel, which stipulation was approved by the Court on June 9, 2016. On August 18, 2016, the defendants filed motions to dismiss the consolidated action, and the plaintiffs filed an opposition brief on October 6, 2016. The Company believes that the claims asserted in the complaints are without merit and intend to vigorously defend the lawsuits.

Bremer Kreditbank AG. In September 2013, the Company, together with other affiliates of Apollo, reached an agreement to make an investment in an entity that agreed to acquire a minority participation in Bremer Kreditbank AG (“BKB”). The Company committed to invest up to approximately €38,000 (or $50,000), representing approximately 21% of the ownership in BKB. In September 2014, the Company, through a wholly owned subsidiary, acquired a 59% ownership interest in Champ LP following which a wholly-owned subsidiary of Champ LP then acquired a 35% ownership interest in BKB.

In February 2015, the Company sold approximately 48% of its ownership interest in Champ LP at cost to an account managed by Apollo for approximately €16,314 (or $20,794). In June 2016, the Company transferred €427 of its unfunded commitment to Apollo, reducing its unfunded commitment to Champ LP to €2,802 (or $3,149). Through its interest in Champ LP, the Company now holds an indirect ownership interest of approximately 9.34% in BKB.

Loan Commitments. As described in "Note 5 - Commercial Mortgage Loans" and "Note 6 - Subordinate Loans," respectively, at September 30, 2016, the Company had $173,680 of unfunded commitments related to its commercial mortgage loan portfolio and subordinate loan portfolio.