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S000005599 [Member] Investment Objectives and Goals - Wilmington New York Municipal Bond Fund
Apr. 30, 2025
Prospectus [Line Items]  
Risk/Return [Heading] WILMINGTON NEW YORK MUNICIPAL BOND FUND SUMMARY
Objective [Heading] Investment Goal
Objective, Primary [Text Block]
The Fund seeks to provide current income that is exempt from both federal and New York personal income taxes.