Shareholder Report, Average Annual Return (Details)
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12 Months Ended |
60 Months Ended |
120 Months Ended |
Aug. 31, 2026 |
Aug. 31, 2026 |
Aug. 31, 2026 |
| C000017636 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Intermediate-Term Municipal Fund, Class F Shares
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| C000147417 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Intermediate-Term Municipal Fund, Class Y Shares
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| C000017624 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Short Duration Municipal Fund, Class F Shares
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| C000147411 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Short Duration Municipal Fund, Class Y Shares
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| C000017631 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
California Municipal Bond Fund, Class F Shares
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| C000147416 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
California Municipal Bond Fund, Class Y Shares
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| C000017627 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Massachusetts Municipal Bond Fund, Class F Shares
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| C000147413 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Massachusetts Municipal Bond Fund, Class Y Shares
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| C000017630 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
New Jersey Municipal Bond Fund, Class F Shares
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| C000147415 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
New Jersey Municipal Bond Fund, Class Y Shares
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| C000017629 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
New York Municipal Bond Fund, Class F Shares
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| C000147414 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
New York Municipal Bond Fund, Class Y Shares
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| C000017626 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Pennsylvania Municipal Bond Fund, Class F Shares
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| C000147412 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Pennsylvania Municipal Bond Fund, Class Y Shares
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| C000047166 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Tax-Advantaged Income Fund, Class F Shares
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| C000147418 |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Tax-Advantaged Income Fund, Class Y Shares
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| Without Sales Load [Member] | C000017636 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.40%
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0.45%
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1.69%
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| Without Sales Load [Member] | C000147417 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
3.66%
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0.70%
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1.95%
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| Without Sales Load [Member] | C000017624 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.21%
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1.80%
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1.46%
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| Without Sales Load [Member] | C000147411 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.47%
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2.05%
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1.70%
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| Without Sales Load [Member] | C000017631 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.04%
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0.11%
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1.04%
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| Without Sales Load [Member] | C000147416 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.19%
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0.27%
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1.19%
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| Without Sales Load [Member] | C000017627 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
1.94%
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0.03%
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0.98%
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| Without Sales Load [Member] | C000147413 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
1.99%
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0.16%
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1.12%
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| Without Sales Load [Member] | C000017630 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.17%
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0.48%
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1.30%
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| Without Sales Load [Member] | C000147415 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.22%
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0.61%
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1.44%
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| Without Sales Load [Member] | C000017629 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.55%
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0.56%
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1.25%
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| Without Sales Load [Member] | C000147414 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.70%
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0.72%
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1.41%
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| Without Sales Load [Member] | C000017626 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.01%
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0.23%
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1.35%
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| Without Sales Load [Member] | C000147412 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
2.16%
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0.38%
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1.50%
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| Without Sales Load [Member] | C000047166 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.67%
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0.56%
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2.74%
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| Without Sales Load [Member] | C000147418 |
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| Average Annual Return [Line Items] |
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| Average Annual Return, Percent |
4.93%
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0.81%
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2.99%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg US Municipal Bond Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg US Municipal Bond Index (USD)
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| Average Annual Return, Percent |
4.12%
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0.54%
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1.91%
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| Bloomberg 3-15 Year Municipal Blend Index (2-17) (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 3-15 Year Municipal Blend Index (2-17) (USD)
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| Average Annual Return, Percent |
2.93%
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0.83%
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1.93%
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| Bloomberg 3-15 Year Municipal Blend Index (2-17) (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 3-15 Year Municipal Blend Index (2-17) (USD)
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| Average Annual Return, Percent |
2.93%
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0.83%
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1.93%
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| Bloomberg 1 Year Municipal Bond Index (1-2) (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 1 Year Municipal Bond Index (1-2) (USD)
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| Average Annual Return, Percent |
2.36%
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1.99%
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1.69%
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| Bloomberg 1 Year Municipal Bond Index (1-2) (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 1 Year Municipal Bond Index (1-2) (USD)
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| Average Annual Return, Percent |
2.36%
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1.99%
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1.69%
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| Bloomberg California Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg California Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
1.76%
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0.73%
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1.70%
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| Bloomberg California Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg California Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
1.76%
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0.73%
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1.70%
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| Bloomberg Massachusetts Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Massachusetts Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
1.99%
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0.54%
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1.65%
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| Bloomberg Massachusetts Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Massachusetts Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
1.99%
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0.54%
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1.65%
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| Bloomberg 3-10 Year Municipal Blend Index (2-12) (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 3-10 Year Municipal Blend Index (2-12) (USD)
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| Average Annual Return, Percent |
2.32%
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0.97%
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1.84%
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| Bloomberg 3-10 Year Municipal Blend Index (2-12) (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 3-10 Year Municipal Blend Index (2-12) (USD)
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| Average Annual Return, Percent |
2.32%
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0.97%
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1.84%
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| Bloomberg New York Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg New York Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
2.35%
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0.92%
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1.79%
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| Bloomberg New York Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg New York Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
2.35%
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0.92%
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1.79%
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| Bloomberg Pennsylvania Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Pennsylvania Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
2.37%
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0.73%
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2.15%
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| Bloomberg Pennsylvania Intermediate Municipal Index (USD) |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg Pennsylvania Intermediate Municipal Index (USD)
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| Average Annual Return, Percent |
2.37%
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0.73%
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2.15%
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| Bloomberg 60% Tax-Exempt High Yield/40% Municipal Investment Grade Custom Capped Custom Weighted Index Unhedged US |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 60% Tax-Exempt High Yield/40% Municipal Investment Grade Custom Capped Custom Weighted Index Unhedged US
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| Average Annual Return, Percent |
5.64%
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1.01%
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3.01%
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| Bloomberg 60% Tax-Exempt High Yield/40% Municipal Investment Grade Custom Capped Custom Weighted Index Unhedged US |
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| Average Annual Return [Line Items] |
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| Line Graph and Table Measure Name |
Bloomberg 60% Tax-Exempt High Yield/40% Municipal Investment Grade Custom Capped Custom Weighted Index Unhedged US
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| Average Annual Return, Percent |
5.64%
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1.01%
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3.01%
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