Shareholder Report, Holdings (Details)	Aug. 31, 2025
C000005545 \| Georgia
Holdings [Line Items]
Percent of Net Asset Value	94.20%
C000005545 \| Puerto Rico
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000005545 \| Wisconsin
Holdings [Line Items]
Percent of Net Asset Value	0.80%
C000005545 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	(0.20%)
C000005545 \| Hospital Revenue
Holdings [Line Items]
Percent of Net Asset Value	17.60%
C000005545 \| Dedicated Tax Revenue
Holdings [Line Items]
Percent of Net Asset Value	12.80%
C000005545 \| Air & Sea Transportation
Holdings [Line Items]
Percent of Net Asset Value	12.50%
C000005545 \| Housing Finance Revenue
Holdings [Line Items]
Percent of Net Asset Value	10.90%
C000005545 \| Electric Revenue
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000005545 \| Water & Sewer Revenue
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000005545 \| Educational Revenue
Holdings [Line Items]
Percent of Net Asset Value	6.80%
C000005545 \| General Obligations - Local
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000005545 \| General Obligations - State
Holdings [Line Items]
Percent of Net Asset Value	3.80%
C000005545 \| Other 2
Holdings [Line Items]
Percent of Net Asset Value	15.70%
C000193183 \| Georgia
Holdings [Line Items]
Percent of Net Asset Value	94.20%
C000193183 \| Puerto Rico
Holdings [Line Items]
Percent of Net Asset Value	5.20%
C000193183 \| Wisconsin
Holdings [Line Items]
Percent of Net Asset Value	0.80%
C000193183 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	(0.20%)
C000193183 \| Hospital Revenue
Holdings [Line Items]
Percent of Net Asset Value	17.60%
C000193183 \| Dedicated Tax Revenue
Holdings [Line Items]
Percent of Net Asset Value	12.80%
C000193183 \| Air & Sea Transportation
Holdings [Line Items]
Percent of Net Asset Value	12.50%
C000193183 \| Housing Finance Revenue
Holdings [Line Items]
Percent of Net Asset Value	10.90%
C000193183 \| Electric Revenue
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000193183 \| Water & Sewer Revenue
Holdings [Line Items]
Percent of Net Asset Value	7.70%
C000193183 \| Educational Revenue
Holdings [Line Items]
Percent of Net Asset Value	6.80%
C000193183 \| General Obligations - Local
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000193183 \| General Obligations - State
Holdings [Line Items]
Percent of Net Asset Value	3.80%
C000193183 \| Other 2
Holdings [Line Items]
Percent of Net Asset Value	15.70%