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Right Allianz Tranche Right [Member] Allianz Tranche Right Net income (loss) Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Preferred stock tranche liability Preferred Stock Tranche Liability [Member] Preferred Stock Tranche Liability Debt, net of unamortized deferred financing cost Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Operating cash flow from operating leases Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net income (loss) available to the Company - diluted Net Income (Loss) Available to Common Stockholders, Diluted Intangible Assets, Impairment Impairment of Intangible Assets (Excluding Goodwill) Long-term growth rate Measurement Input, Long-Term Revenue Growth Rate [Member] Goodwill Goodwill [Roll Forward] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Credit Facility Credit Facility [Member] Credit Facility Diluted (in shares) Weighted-average shares of Class A Common Stock outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Reporting Segment Reporting, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Percentage decline in real estate investment portfolio Real Estate Investment, Percentage Decline In Value Real Estate Investment, Percentage Decline In Value Envoi, LLC (“Envoi”), East End Advisors, LLC ("EEA"), Pointwise Partners Limited ("PW"), Kontora Family Office GmbH ("Kontora") Envoi, LLC (“Envoi”), East End Advisors, LLC ("EEA"), Pointwise Partners Limited ("PW"), Kontora Family Office GmbH ("Kontora") [Member] Envoi, LLC (“Envoi”), East End Advisors, LLC ("EEA"), Pointwise Partners Limited ("PW"), Kontora Family Office GmbH ("Kontora") Entity Small Business Entity Small Business Voting interest acquired (in percent) Business Combination, Voting Equity Interest Acquired, Percentage Payment of preferred stock and Constellation Warrants issuance costs Payments of Stock Issuance Costs Earn-out liability Earnout Liability [Member] Earnout Liability Income Tax Disclosure [Abstract] International Real Estate International Real Estate Segment [Member] International Real Estate Segment Document Transition Report Document Transition Report Other assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Income Taxes Income Tax Disclosure [Text Block] Class A Common Stock Common Class A [Member] Conversion ratio Common Stock, Convertible, Conversion Ratio Common Stock, Convertible, Conversion Ratio Cash payment for earnout Payment for Contingent Consideration Liability, Financing Activities Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Short-term lease expense Short-Term Lease, Cost Constellation And Allianz Warrant Constellation And Allianz Warrant [Member] Constellation And Allianz Warrant Stock Awards Share Awards [Member] Share Awards Investments – External Strategic Managers Investments – external strategic managers Investments - External Strategic Managers [Member] Investments - External Strategic Managers Operating cash flow from operating leases Increase (Decrease) in Operating Lease Liability Total shareholders’ equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Member contribution (distribution) Payments Of Member Distributions Payments Of Member Distributions Document Type Document Type Equity method investments, Fair Value Equity Method Investments, Fair Value Disclosure Level 3 Fair Value, Inputs, Level 3 [Member] Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional 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