Commitments and Contingencies	12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Matters The Company is regularly involved in litigation and arbitration as well as examinations, inquiries and investigations by various regulatory bodies, including the SEC, involving its compliance with, among other things, securities laws, client investment guidelines, laws governing the activities of broker-dealers and other laws and regulations affecting its products and other activities. Legal and regulatory matters of this nature involve or may involve but are not limited to the Company’s activities as an employer, issuer of securities, investor, investment adviser, broker-dealer or taxpayer. In addition, in the normal course of business, the Company discusses matters with its regulators raised during regulatory examinations or is otherwise subject to their inquiry. These matters could result in censures, fines, penalties or other sanctions. The Company accrues for a liability when it is both probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Significant judgment is required in both the determination of probability and the determination as to whether a loss is reasonably estimable. In addition, in the event the Company determines that a loss is not probable, but is reasonably possible, and it becomes possible to develop what the Company believes to be a reasonable range of possible loss, then the Company will include disclosures related to such matter as appropriate and in compliance with ASC 450, Loss Contingencies. The disclosures, accruals or estimates, if any, resulting from the foregoing analysis are reviewed at least quarterly and adjusted to reflect the impact of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular matter. Based on information currently available, available insurance coverage and established reserves, the Company believes that the outcomes of its legal and regulatory proceedings are not likely, either individually or in the aggregate, to have a material adverse effect on the Company’s results of operations, cash flows or its consolidated financial condition. However, in the event of unexpected subsequent developments and given the inherent unpredictability of these legal and regulatory matters, the Company can provide no assurance that its assessment of any claim, dispute, regulatory examination or investigation or other legal matter will reflect the ultimate outcome and an adverse outcome in certain matters could, from time to time, have a material adverse effect on the Company’s results of operations or cash flows in particular quarterly or annual periods. In re Virtus Investment Partners, Inc. Securities Litigation; formerly Tom Cummins v. Virtus Investment Partners Inc. et al On February 20, 2015, a putative class action complaint was filed against the Company and certain of the Company’s current officers (the "defendants") in the United States District Court for the Southern District of New York (the "Court"). On August 21, 2015, the plaintiffs filed a Consolidated Class Action Complaint (the "Complaint") purportedly filed on behalf of all purchasers of the Company’s common stock between January 25, 2013 and May 11, 2015 (the "Class Period"). The Complaint alleged that, during the Class Period, the defendants disseminated materially false and misleading statements and concealed material adverse facts relating to certain funds and alleged claims under Sections 10(b) and 20(a) of the Exchange Act, and Rule 10b-5. While the Company believed that the suit was without merit, on May 18, 2018, it executed a final settlement agreement with the plaintiffs settling all claims in the litigation in order to avoid the cost, distraction, disruption, and inherent litigation uncertainty. The settlement was approved by the Court on December 4, 2018, and on January 11, 2019, the Court entered final judgment, concluding the action. Lease Commitments The Company incurred rental expenses, primarily related to office space, under operating leases of $8.1 million, $6.2 million and $4.4 million in 2018, 2017 and 2016, respectively. Minimum aggregate rental payments required under operating leases that have initial or remaining non-cancellable lease terms in excess of one year as of December 31, 2018 are as follows: $6.1 million in 2019; $6.5 million in 2020; $5.1 million in 2021; $3.9 million in 2022; $3.5 million in 2023; and $12.9 million thereafter.

Commitments and Contingencies

Legal Matters

The Company is regularly involved in litigation and arbitration as well as examinations, inquiries and investigations by various regulatory bodies, including the SEC, involving its compliance with, among other things, securities laws, client investment guidelines, laws governing the activities of broker-dealers and other laws and regulations affecting its products and other activities. Legal and regulatory matters of this nature involve or may involve but are not limited to the Company’s activities as an employer, issuer of securities, investor, investment adviser, broker-dealer or taxpayer. In addition, in the normal course of business, the Company discusses matters with its regulators raised during regulatory examinations or is otherwise subject to their inquiry. These matters could result in censures, fines, penalties or other sanctions.

The Company accrues for a liability when it is both probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Significant judgment is required in both the determination of probability and the determination as to whether a loss is reasonably estimable. In addition, in the event the Company determines that a loss is not probable, but is reasonably possible, and it becomes possible to develop what the Company believes to be a reasonable range of possible loss, then the Company will include disclosures related to such matter as appropriate and in compliance with ASC 450, Loss Contingencies. The disclosures, accruals or estimates, if any, resulting from the foregoing analysis are reviewed at least quarterly and adjusted to reflect the impact of negotiations, settlements, rulings, advice of legal counsel and other information and events pertaining to a particular matter. Based on information currently available, available insurance coverage and established reserves, the Company believes that the outcomes of its legal and regulatory proceedings are not likely, either individually or in the aggregate, to have a material adverse effect on the Company’s results of operations, cash flows or its consolidated financial condition. However, in the event of unexpected subsequent developments and given the inherent unpredictability of these legal and regulatory matters, the Company can provide no assurance that its assessment of any claim, dispute, regulatory examination or investigation or other legal matter will reflect the ultimate outcome and an adverse outcome in certain matters could, from time to time, have a material adverse effect on the Company’s results of operations or cash flows in particular quarterly or annual periods.

In re Virtus Investment Partners, Inc. Securities Litigation; formerly Tom Cummins v. Virtus Investment Partners Inc.

et al

On February 20, 2015, a putative class action complaint was filed against the Company and certain of the Company’s current officers (the "defendants") in the United States District Court for the Southern District of New York (the "Court"). On August 21, 2015, the plaintiffs filed a Consolidated Class Action Complaint (the "Complaint") purportedly filed on behalf of all purchasers of the Company’s common stock between January 25, 2013 and May 11, 2015 (the "Class Period"). The Complaint alleged that, during the Class Period, the defendants disseminated materially false and misleading statements and concealed material adverse facts relating to certain funds and alleged claims under Sections 10(b) and 20(a) of the Exchange Act, and Rule 10b-5. While the Company believed that the suit was without merit, on May 18, 2018, it executed a final settlement agreement with the plaintiffs settling all claims in the litigation in order to avoid the cost, distraction, disruption, and inherent litigation uncertainty. The settlement was approved by the Court on December 4, 2018, and on January 11, 2019, the Court entered final judgment, concluding the action.

Lease Commitments

The Company incurred rental expenses, primarily related to office space, under operating leases of $8.1 million, $6.2 million and $4.4 million in 2018, 2017 and 2016, respectively. Minimum aggregate rental payments required under operating leases that have initial or remaining non-cancellable lease terms in excess of one year as of December 31, 2018 are as follows: $6.1 million in 2019; $6.5 million in 2020; $5.1 million in 2021; $3.9 million in 2022; $3.5 million in 2023; and $12.9 million thereafter.