v3.26.3
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended 120 Months Ended
Aug. 31, 2026
Aug. 31, 2026
Aug. 31, 2026
C000135933 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Nomura Tax-Free Pennsylvania Fund (Institutional Class) – including sales charge    
Average Annual Return, Percent 6.44% 0.64% 2.20%
C000006344 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Nomura Tax-Free Pennsylvania Fund (Class C) – including sales charge    
Average Annual Return, Percent 4.38% (0.39%) 1.17%
C000006342 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Nomura Tax-Free Pennsylvania Fund (Class A) – including sales charge    
Average Annual Return, Percent 1.34% (0.54%) 1.46%
Without Sales Load [Member] | C000135933 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Nomura Tax-Free Pennsylvania Fund (Institutional Class) – excluding sales charge    
Average Annual Return, Percent 6.44% 0.64% 2.20%
Without Sales Load [Member] | C000006344 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Nomura Tax-Free Pennsylvania Fund (Class C) – excluding sales charge    
Average Annual Return, Percent 5.38% (0.39%) 1.17%
Without Sales Load [Member] | C000006342 [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Nomura Tax-Free Pennsylvania Fund (Class A) – excluding sales charge    
Average Annual Return, Percent 6.17% 0.37% 1.94%
Bloomberg Municipal Bond Index [Member]      
Average Annual Return [Line Items]      
Line Graph and Table Measure Name Bloomberg Municipal Bond Index    
Average Annual Return, Percent 4.12% 0.54% 1.91%