S000016626 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 87 Months Ended | 120 Months Ended | 132 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2026 |
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| Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses or taxes) | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | [1] | 4.25% | 0.80% | 2.34% | |||||
| Bloomberg Municipal 1-15 Year Index (reflects no deduction for fees, expenses or taxes) | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | [2] | 5.18% | 1.16% | 2.27% | |||||
| Class A | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 1.61% | 0.76% | 1.84% | ||||||
| Class A | After Taxes on Distributions | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 1.61% | 0.76% | 1.84% | ||||||
| Class A | After Taxes on Distributions and Sales | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 2.25% | 1.18% | 2.05% | ||||||
| Class C | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 3.52% | 0.68% | 1.49% | ||||||
| Class I | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 4.15% | 1.41% | 2.23% | ||||||
| Class IS | |||||||||
| Prospectus [Line Items] | |||||||||
| Average Annual Return, Percent | 4.37% | 1.47% | 2.58% | ||||||
| Performance Inception Date | Sep. 18, 2018 | ||||||||
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