v3.26.3
Load [Member] Investment Objectives and Goals - North Carolina Tax-Free Income Series
Jun. 30, 2026
Prospectus [Line Items]  
Risk/Return [Heading] North Carolina Tax‑Free Income Series
Objective [Heading] INVESTMENT OBJECTIVES
Objective, Primary [Text Block]
The Fund seeks to provide a high and stable level of income exempt from federal and North Carolina personal income taxes derived from North Carolina municipal securities without incurring undue risk to principal.