Shareholder Report, Holdings (Details)	Aug. 31, 2026
C000005542 \| New Jersey
Holdings [Line Items]
Percent of Net Asset Value	87.50%
C000005542 \| New York
Holdings [Line Items]
Percent of Net Asset Value	6.30%
C000005542 \| Puerto Rico
Holdings [Line Items]
Percent of Net Asset Value	5.60%
C000005542 \| Pennsylvania
Holdings [Line Items]
Percent of Net Asset Value	0.40%
C000005542 \| Guam
Holdings [Line Items]
Percent of Net Asset Value	0.30%
C000005542 \| Delaware
Holdings [Line Items]
Percent of Net Asset Value	0.30%
C000005542 \| Investment TypeOther Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	(0.40%)
C000005542 \| Ground Transportation Revenue
Holdings [Line Items]
Percent of Net Asset Value	19.80%
C000005542 \| Educational Revenue
Holdings [Line Items]
Percent of Net Asset Value	16.90%
C000005542 \| Hospital Revenue
Holdings [Line Items]
Percent of Net Asset Value	15.10%
C000005542 \| Housing Finance Revenue
Holdings [Line Items]
Percent of Net Asset Value	14.40%
C000005542 \| Lease Revenue
Holdings [Line Items]
Percent of Net Asset Value	9.40%
C000005542 \| General Obligations - Local
Holdings [Line Items]
Percent of Net Asset Value	8.90%
C000005542 \| Dedicated Tax Revenue
Holdings [Line Items]
Percent of Net Asset Value	4.80%
C000005542 \| General Obligations - State
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C000005542 \| Pre-Refunded
Holdings [Line Items]
Percent of Net Asset Value	1.20%
C000005542 \| Other 2
Holdings [Line Items]
Percent of Net Asset Value	7.80%
C000193181 \| New Jersey
Holdings [Line Items]
Percent of Net Asset Value	87.50%
C000193181 \| New York
Holdings [Line Items]
Percent of Net Asset Value	6.30%
C000193181 \| Puerto Rico
Holdings [Line Items]
Percent of Net Asset Value	5.60%
C000193181 \| Pennsylvania
Holdings [Line Items]
Percent of Net Asset Value	0.40%
C000193181 \| Guam
Holdings [Line Items]
Percent of Net Asset Value	0.30%
C000193181 \| Delaware
Holdings [Line Items]
Percent of Net Asset Value	0.30%
C000193181 \| Investment TypeOther Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	(0.40%)
C000193181 \| Ground Transportation Revenue
Holdings [Line Items]
Percent of Net Asset Value	19.80%
C000193181 \| Educational Revenue
Holdings [Line Items]
Percent of Net Asset Value	16.90%
C000193181 \| Hospital Revenue
Holdings [Line Items]
Percent of Net Asset Value	15.10%
C000193181 \| Housing Finance Revenue
Holdings [Line Items]
Percent of Net Asset Value	14.40%
C000193181 \| Lease Revenue
Holdings [Line Items]
Percent of Net Asset Value	9.40%
C000193181 \| General Obligations - Local
Holdings [Line Items]
Percent of Net Asset Value	8.90%
C000193181 \| Dedicated Tax Revenue
Holdings [Line Items]
Percent of Net Asset Value	4.80%
C000193181 \| General Obligations - State
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C000193181 \| Pre-Refunded
Holdings [Line Items]
Percent of Net Asset Value	1.20%
C000193181 \| Other 2
Holdings [Line Items]
Percent of Net Asset Value	7.80%