Prepayment Risk 1 [Member] Prepayment Risk 1 Airline Leasing Risks [Member] Airline Leasing Risks Requirement For Certain Licenses And Approvals Risk [Member] Requirement For Certain Licenses And Approvals Risk Controls On Investment; Repatriation Limitation Risk [Member] Controls On Investment; Repatriation Limitation Risk Participation Interests And Synthetic Securities Risk [Member] Participation Interests And Synthetic Securities Risk Restructuring Of Leases Risk [Member] Restructuring Of Leases Risk Privacy And Data Security Laws Risk [Member] Privacy And Data Security Laws Risk Lessee Or Borrower Defaults And Other Credit Problems Risk [Member] Lessee Or Borrower Defaults And Other Credit Problems Risk Investment Company And ETF Risk [Member] Investment Company And ETF Risk Structured Finance Risk [Member] Structured Finance Risk Syndicated (Floating Rate, Bank, Leveraged, Senior) Loan Risk [Member] Syndicated (Floating Rate, Bank, Leveraged, Senior) Loan Risk Distribution Rate Risk [Member] Distribution Rate Risk High-Yield Investments Risk [Member] High-Yield Investments Risk Transaction Level Leverage Risk [Member] Transaction Level Leverage Risk Cyber Security Risk [Member] Cyber Security Risk Non-Diversified Status Risk [Member] Non-Diversified Status Risk Valuation Risk [Member] Valuation Risk Amortization Risk [Member] Amortization Risk Securitization Structuring Risk [Member] Securitization Structuring Risk Interest Rate 1 Risk [Member] Interest Rate 1 Risk Impairment Of Collateral Risk [Member] Impairment Of Collateral Risk Borrower Fraud Risk [Member] Borrower Fraud Risk Effect Of Airline Bankruptcy Risk [Member] Effect Of Airline Bankruptcy Risk Effect Of War Or Armed Hostilities And Terrorist Attacks Risk [Member] Effect Of War Or Armed Hostilities And Terrorist Attacks Risk Ownership Risk Associated With Investment Strategy [Member] Ownership Risk Associated With Investment Strategy Structure Of Investments Risk [Member] Structure Of Investments Risk Financial Risks [Member] Financial Risks Investment Dilution Risk [Member] Investment Dilution Risk Counterparty Risk [Member] Counterparty Risk Effect Of Airworthiness Directives And Operating Restrictions Risk [Member] Effect Of Airworthiness Directives And Operating Restrictions Risk Consumer Demand For Air Travel Risk [Member] Consumer Demand For Air Travel Risk Extension Risk [Member] Extension Risk Rating Agencies Risk [Member] Rating Agencies Risk Credit Risk 1 [Member] Credit Risk 1 Cyber-Attacks May Negatively Affect The Lessees And The Airline Industry Risk [Member] Cyber-Attacks May Negatively Affect The Lessees And The Airline Industry Risk Lending Risk [Member] Lending Risk Failure To Discharge Aircraft Liens Appropriately Risk [Member] Failure To Discharge Aircraft Liens Appropriately Risk Class of Stock [Domain] Federal Income Tax Risk [Member] Federal Income Tax Risk Investor Class [Member] Investor Class Technological Risks [Member] Technological Risks Debt Securities Risk [Member] Debt Securities Risk Jurisdictional Risk [Member] Jurisdictional Risk Repurchase Offer Risk [Member] Repurchase Offer Risk Aviation Assets Risk [Member] Aviation Assets Risk Common Shares Not Listed; No Market For Common Shares Risk [Member] Common Shares Not Listed; No Market For Common Shares Risk Sustainability Risk [Member] Sustainability Risk Adjustments To Terms Of Investments Risk [Member] Adjustments To Terms Of Investments Risk Registration Of Aircraft Risk [Member] Registration Of Aircraft Risk Environmental, Greenhouse Emission And Noise Regulatory Risk [Member] Environmental, Greenhouse Emission And Noise Regulatory Risk Leverage Risks [Member] Leverage Risks Higher Costs Resulting From Lease Or Consignment Default Risk [Member] Higher Costs Resulting From Lease Or Consignment Default Risk Supra Institutional Class [Member] Supra Institutional Class Liability Risk Following The Disposal Of Investments Risk [Member] Liability Risk Following The Disposal Of Investments Risk Institutional Class [Member] Institutional Class Foreign Currency Risk [Member] Foreign Currency Risk Regulatory Change Risk [Member] Regulatory Change Risk OFAC And FCPA Considerations Risk [Member] OFAC And FCPA Considerations Risk Liabilities, Loss And Insurance Risk [Member] Liabilities, Loss And Insurance Risk Maintenance Of Aircraft During Lease Term; Funding Of Maintenance; Maintenance Reserves Risk [Member] Maintenance Of Aircraft During Lease Term; Funding Of Maintenance; Maintenance Reserves Risk Subsidiary Risks [Member] Subsidiary Risks Global Market Volatility And Geopolitical Developments Risk [Member] Global Market Volatility And Geopolitical Developments Risk Risk Lose Money [Member] Risk Lose Money Large Shareholder Risk [Member] Large Shareholder Risk Fuel Cost Volatility Risk [Member] Fuel Cost Volatility Risk Management Risk [Member] Management Risk Potential Additional Operating Costs Could Negatively Impact The Fund’s Ability To Make Payments Risk [Member] Potential Additional Operating Costs Could Negatively Impact The Fund’s Ability To Make Payments Risk Lessee Credit Risk [Member] Lessee Credit Risk New Fund Risk [Member] New Fund Risk Asset-Backed Securities Risk [Member] Asset-Backed Securities Risk Liquidity Risk [Member] Liquidity Risk Re-Leasing Of Aircraft Risk [Member] Re-Leasing Of Aircraft Risk Non-U.S. Investment Risk [Member] Non-U.S. Investment Risk U.S. Government Securities Risk [Member] U.S. Government Securities Risk Liability Risk As Lessor [Member] Liability Risk As Lessor Common Stock [Member] Risk Of Decline In Aircraft Value, Rental Rates, And Part Prices [Member] Risk Of Decline In Aircraft Value, Rental Rates, And Part Prices Investments In Undervalued Aviation Assets Risk [Member] Investments In Undervalued Aviation Assets Risk Co-Investment Risk Member [Member] Co-Investment Risk Member Intensified Competition On Aircraft Financing And Leasing Market Risk [Member] Intensified Competition On Aircraft Financing And Leasing Market Risk