Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.25% | 0.80% | 2.34% |
| Bloomberg Oregon Municipal Bond Index (reflects no deduction for fees, expenses or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.77% | 0.45% | 2.20% |
| Class A | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 0.22% | (0.46%) | 1.27% |
| Class A | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 0.22% | (0.46%) | 1.27% |
| Class A | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 1.14% | 0.15% | 1.55% |
| Class C | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 2.53% | (0.13%) | 1.17% |
| Class I | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.30% | 0.61% | 1.89% |