SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements are prepared in accordance with the generally accepted accounting principles in the United States (“GAAP”) for interim financial information and instructions to the Quarterly Report on Form 10-Q. The condensed consolidated financial statements, including these notes, are unaudited and exclude some of the disclosures required in annual financial statements. Management believes it has made all necessary adjustments so that the condensed consolidated financial statements are presented fairly and that estimates made in preparing its condensed consolidated financial statements are reasonable and prudent, and that all such adjustments are of a normal recurring nature. The operating results presented for interim periods are not necessarily indicative of the results that may be expected for any other interim period or for the entire year. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2020 filed with the Securities and Exchange Commission (“SEC”). As of September 30, 2021, the impact of the outbreak of the novel coronavirus (“COVID-19”) pandemic continues to unfold. As a result, management's estimates and assumptions may be subject to a higher degree of variability and volatility that may result in material differences from the current period. The condensed consolidated financial statements include the accounts and activities of the AOG entities, their consolidated subsidiaries and certain Consolidated Funds. All intercompany balances and transactions have been eliminated upon consolidation.
Reclassifications	The Company has reclassified certain prior period amounts to conform to the current year presentation.
Business Combinations	Business Combinations The Company accounts for business combinations using the acquisition method of accounting, under which the purchase price of the acquisition, including the fair value of certain elements of contingent consideration, is allocated to the assets acquired and liabilities assumed using the fair values determined by management as of the acquisition date. Contingent consideration obligations are recognized as of the acquisition date at fair value based on the probability that contingency will be realized. Any fair value of purchase consideration in excess of the fair value of the assets acquired less liabilities assumed is recorded as goodwill. Conversely, any excess of the fair value of the net assets acquired over the purchase consideration is recognized as a bargain purchase gain. Acquisition-related costs incurred in connection with a business combination are expensed as incurred.
U.S. Treasury Securities, at Fair Value	U.S. Treasury Securities, at Fair Value U.S. Treasury securities, at fair value represents U.S. Treasury bills that were purchased with funds raised through the initial public offering of AAC, a consolidated SPAC that is presented within Consolidated Funds. The funds raised are held in a trust account that is restricted for use and may only be used for purposes of completing an initial business combination or redemption of public shares as set forth in the trust agreement. The U.S. Treasury bills have original maturities greater than three months when purchased and therefore are recorded at fair value. Interest income received on such securities is separately presented from the overall change in fair value and is recognized within interest and other income of Consolidated Funds in the Condensed Consolidated Statements of Operations. Any remaining change in fair value of such securities, that is not recognized as interest income, is recognized in net realized and unrealized gains (losses) on investments of Consolidated Funds in the Condensed Consolidated Statements of Operations.
Redeemable Interest in Consolidated Funds	Redeemable Interest in Consolidated FundsRedeemable interest in Consolidated Funds represent the Class A ordinary shares issued by AAC that are redeemable for cash by the public shareholders in the event that AAC does not complete a business combination or tender offer associated with stockholder approval provisions. The class A ordinary shareholders have redemption rights that are considered to be outside of AAC’s control. At each balance sheet date, the carrying value of the redeemable interest is presented at the redemption amount.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The Company considers the applicability and impact of all accounting standard updates (“ASU”) issued by the Financial Accounting Standards Board (“FASB”). ASUs not listed below were assessed and either determined to be not applicable or expected to have minimal impact on its condensed consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848). The amendments in this update provide optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this update apply only to contracts, hedging relationships, and other transactions that reference the London Interbank Offered Rate ("LIBOR") or another reference rate expected to be discontinued because of reference rate reform. In January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848), to clarify that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. An entity may elect to adopt the amendments in ASU 2020-04 and ASU 2021-01 at any time after March 12, 2020 but no later than December 31, 2022. The expedients and exceptions provided by the amendments do not apply to contract modifications and hedging relationships entered into or evaluated after December 31, 2022, except for hedging transactions as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. The Company is currently evaluating the impact of this guidance on its condensed consolidated financial statements.
Fair Value Measurements	GAAP establishes a hierarchical disclosure framework that prioritizes the inputs used in measuring financial instruments at fair value into three levels based on their market price observability. Market price observability is affected by a number of factors, including the type of instrument and the characteristics specific to the instrument. Financial instruments with readily available quoted prices from an active market or for which fair value can be measured based on actively quoted prices generally have a higher degree of market price observability and a lesser degree of judgment inherent in measuring fair value. Financial assets and liabilities measured and reported at fair value are classified as follows: •Level I—Quoted prices in active markets for identical instruments. •Level II—Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in inactive markets; and model-derived valuations with directly or indirectly observable significant inputs. Level II inputs include prices in markets with few transactions, non-current prices, prices for which little public information exists or prices that vary substantially over time or among brokered market makers. Other inputs include interest rates, yield curves, volatilities, prepayment risks, loss severities, credit risks and default rates. •Level III—Valuations that rely on one or more significant unobservable inputs. These inputs reflect the Company’s assessment of the assumptions that market participants would use to value the instrument based on the best information available. In some instances, an instrument may fall into more than one level of the fair value hierarchy. In such instances, the instrument’s level within the fair value hierarchy is based on the lowest of the three levels (with Level III being the lowest) that is significant to the fair value measurement. The Company’s assessment of the significance of an input requires judgment and considers factors specific to the instrument. The Company accounts for the transfer of assets into or out of each fair value hierarchy level as of the beginning of the reporting period. Contingent consideration: The Company generally determines the fair value of its contingent consideration liabilities by using a Monte Carlo simulation model. The model considers a range of assumptions including historical experience, prior period performance, current progress towards targets, probability-weighted scenarios, and management's own assumptions. The discount rate used is determined based on the weighted average cost of capital for the Company. The fair value of the Company's contingent consideration liabilities are classified as Level III. Liabilities recorded in connection with the Company’s contingent consideration are included within accounts payable, accrued expenses and other liabilities in the Condensed Consolidated Statements of Financial Condition and the associated changes in fair value are included within other income (expense), net in the Condensed Consolidated Statements of Operations.