Basis of Presentation and Significant Accounting Policies	6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). The condensed consolidated financial statements set forth herein include the accounts of CNS and its direct and indirect subsidiaries, as well as certain investment vehicles that it is required to consolidate. Intercompany balances and transactions have been eliminated in consolidation. The condensed consolidated financial statements of the Company included herein are unaudited and have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the interim results have been made. The Company's condensed consolidated financial statements and the related notes should be read together with the consolidated financial statements and the related notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2025 (Form 10-K). New Accounting Pronouncements Not Yet Implemented In November 2024, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update 2024-03, Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. The standard requires disaggregation of certain expense captions into specified categories in disclosures within the footnotes to the financial statements. This new guidance will be effective on January 1, 2027 for annual reporting and January 1, 2028 for interim reporting. The Company does not expect the adoption of this new standard will have a material impact on the Company's condensed consolidated financial statements and related disclosures. In September 2025, the FASB issued ASU 2025-06, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use-Software. The ASU provides targeted amendments to modernize the accounting framework for internal-use software development, including the removal of the traditional "development stage" model and the introduction of a more principles-based approach to capitalization. Under the new guidance, companies may begin capitalizing internal-use software costs when: management with the relevant authority authorizes and commits to funding the software project and it is probable that the project will be completed, and the software will be used to perform its intended function. This new guidance will be effective on January 1, 2028. The Company does not expect that the adoption of this new standard will have a material impact on the Company's condensed consolidated financial statements and related disclosures. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. The amendments clarify the applicability of interim reporting guidance, specify the form and content of interim financial statements and provide a consolidated list of required interim disclosures across other Accounting Standards Codification topics. The amendments also establish a principle requiring disclosure of events occurring since the end of the last annual reporting period that had a material impact on the entity. This guidance will be effective on January 1, 2028. The Company is currently evaluating the impact that adoption of this standard will have on the Company's condensed consolidated financial statements and related disclosures. Consolidation of Investment Vehicles The Company's financial interests in investment vehicles, including the management fees that are received, are evaluated at inception and thereafter, if there is a reconsideration event, in order to determine whether to apply the Variable Interest Entity (VIE) model or the Voting Interest Entity (VOE) model. A VIE is an entity in which either the equity investment at risk is not sufficient to permit the entity to finance its own activities without additional financial support or the group of holders of the equity investment at risk lack certain characteristics of a controlling financial interest. Limited partnerships and similar entities are determined to be a VIE generally when the Company is the general partner and the limited partners do not hold substantive kick-out or participation rights. The primary beneficiary is the entity that has the power to direct the activities of the VIE that most significantly affect its performance, and the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. The Company assesses whether it is the primary beneficiary of any VIEs identified by evaluating its economic interests in the entity held either directly by the Company and its affiliates or indirectly through employees. VIEs for which the Company is deemed to be the primary beneficiary are consolidated. Subscriptions and redemptions or amendments to the governing documents of the respective entities could affect an entity's status as a VIE or the determination of the primary beneficiary. Investments that are determined to be VOEs are consolidated when the Company’s ownership interest is greater than 50% of the outstanding voting interests of the vehicle. The Company records noncontrolling interests in consolidated funds for which the Company’s ownership is less than 100%.

The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). The condensed consolidated financial statements set forth herein include the accounts of CNS and its direct and indirect subsidiaries, as well as certain investment vehicles that it is required to consolidate. Intercompany balances and transactions have been eliminated in consolidation.

The condensed consolidated financial statements of the Company included herein are unaudited and have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). In the opinion of management, all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the interim results have been made. The Company's condensed consolidated financial statements and the related notes should be read together with the consolidated financial statements and the related notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2025 (Form 10-K).

In November 2024, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update 2024-03, Income Statement — Reporting Comprehensive Income — Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. The standard requires disaggregation of certain expense captions into specified categories in disclosures within the footnotes to the financial statements. This new guidance will be effective on January 1, 2027 for annual reporting and January 1, 2028 for interim reporting. The Company does not expect the adoption of this new standard will have a material impact on the Company's condensed consolidated financial statements and related disclosures.

In September 2025, the FASB issued ASU 2025-06, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use-Software. The ASU provides targeted amendments to modernize the accounting framework for internal-use software development, including the removal of the traditional "development stage" model and the introduction of a more principles-based approach to capitalization. Under the new guidance, companies may begin capitalizing internal-use software costs when: management with the relevant authority authorizes and commits to funding the software project and it is probable that the project will be completed, and the software will be used to perform its intended function. This new guidance will be effective on January 1, 2028. The Company does not expect that the adoption of this new standard will have a material impact on the Company's condensed consolidated financial statements and related disclosures.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. The amendments clarify the applicability of interim reporting guidance, specify the form and content of interim financial statements and provide a consolidated list of required interim disclosures across other Accounting Standards Codification topics. The amendments also establish a principle requiring disclosure of events occurring since the end of the last annual reporting period that had a material impact on the entity. This guidance will be effective on January 1, 2028. The Company is currently evaluating the impact that adoption of this standard will have on the Company's condensed consolidated financial statements and related disclosures.

The Company's financial interests in investment vehicles, including the management fees that are received, are evaluated at inception and thereafter, if there is a reconsideration event, in order to determine whether to apply the Variable Interest Entity (VIE) model or the Voting Interest Entity (VOE) model.

A VIE is an entity in which either the equity investment at risk is not sufficient to permit the entity to finance its own activities without additional financial support or the group of holders of the equity investment at risk lack certain characteristics of a controlling financial interest. Limited partnerships and similar entities are determined to be a VIE generally when the Company is the general partner and the limited partners do not hold substantive kick-out or participation rights. The primary beneficiary is the entity that has the power to direct the activities of the VIE that most significantly affect its performance, and the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. The Company assesses whether it is the primary beneficiary of any VIEs identified by evaluating its economic interests in the entity held either directly by the Company and its affiliates or indirectly through employees. VIEs for which the Company is deemed to be the primary beneficiary are consolidated. Subscriptions and redemptions or amendments to the governing documents of the respective entities could affect an entity's status as a VIE or the determination of the primary beneficiary.