v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000029800 | FR_544532HR8  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000029800 | FR_84247PND9  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000029800 | FR_120827EA4  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000029800 | FR_13063DZX9  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000029800 | FR_13063ECN4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000029800 | FR_13077DUL4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000029800 | FR_5446466P2  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000029800 | FR_345105HY9  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000029800 | FR_842469CC0  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000029800 | FR_79766DMT3  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000029800 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000029800 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000255077 | FR_544532HR8  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000255077 | FR_84247PND9  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000255077 | FR_120827EA4  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000255077 | FR_13063DZX9  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000255077 | FR_13063ECN4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000255077 | FR_13077DUL4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000255077 | FR_5446466P2  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000255077 | FR_345105HY9  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000255077 | FR_842469CC0  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000255077 | FR_79766DMT3  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000255077 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000255077 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000122571 | FR_544532HR8  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000122571 | FR_84247PND9  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000122571 | FR_120827EA4  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000122571 | FR_13063DZX9  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000122571 | FR_13063ECN4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000122571 | FR_13077DUL4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000122571 | FR_5446466P2  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000122571 | FR_345105HY9  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000122571 | FR_842469CC0  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000122571 | FR_79766DMT3  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000122571 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000122571 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000174633 | FR_544532HR8  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000174633 | FR_84247PND9  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000174633 | FR_120827EA4  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000174633 | FR_13063DZX9  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000174633 | FR_13063ECN4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000174633 | FR_13077DUL4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000174633 | FR_5446466P2  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000174633 | FR_345105HY9  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000174633 | FR_842469CC0  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000174633 | FR_79766DMT3  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000174633 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000174633 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000029803 | FR_544532HR8  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000029803 | FR_84247PND9  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000029803 | FR_120827EA4  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000029803 | FR_13063DZX9  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000029803 | FR_13063ECN4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000029803 | FR_13077DUL4  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000029803 | FR_5446466P2  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000029803 | FR_345105HY9  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000029803 | FR_842469CC0  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000029803 | FR_79766DMT3  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000029803 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000029803 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 98.10%
C000029792 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000029792 | New York  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000029792 | Texas  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
C000029792 | California  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000029792 | New Jersey  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000029792 | Alabama  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000029792 | Washington  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000029792 | Michigan  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000029792 | Florida  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000029792 | Pennsylvania  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000029792 | Missouri  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000029792 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 95.40%
C000029792 | LongMunicipal Short Term  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000255076 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000255076 | New York  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000255076 | Texas  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
C000255076 | California  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000255076 | New Jersey  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000255076 | Alabama  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000255076 | Washington  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000255076 | Michigan  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000255076 | Florida  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000255076 | Pennsylvania  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000255076 | Missouri  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000255076 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 95.40%
C000255076 | LongMunicipal Short Term  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000122570 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000122570 | New York  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000122570 | Texas  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
C000122570 | California  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000122570 | New Jersey  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000122570 | Alabama  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000122570 | Washington  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000122570 | Michigan  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000122570 | Florida  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000122570 | Pennsylvania  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000122570 | Missouri  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000122570 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 95.40%
C000122570 | LongMunicipal Short Term  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000174632 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000174632 | New York  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000174632 | Texas  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
C000174632 | California  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000174632 | New Jersey  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000174632 | Alabama  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000174632 | Washington  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000174632 | Michigan  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000174632 | Florida  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000174632 | Pennsylvania  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000174632 | Missouri  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000174632 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 95.40%
C000174632 | LongMunicipal Short Term  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000029795 | Asset Other Line  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000029795 | New York  
Holdings [Line Items]  
Percent of Net Asset Value 13.00%
C000029795 | Texas  
Holdings [Line Items]  
Percent of Net Asset Value 12.90%
C000029795 | California  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000029795 | New Jersey  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000029795 | Alabama  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000029795 | Washington  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000029795 | Michigan  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000029795 | Florida  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000029795 | Pennsylvania  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000029795 | Missouri  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000029795 | LongMunicipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 95.40%
C000029795 | LongMunicipal Short Term  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%