S000001249 [Member] Average Annual Total Returns |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| Bloomberg U.S. 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 Arizona Municipal Bond Index (reflects no deduction for fees, expenses, or taxes) | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 4.18% | 0.67% | 2.17% |
| ARIZONA TAX-EXEMPT FUND | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 3.29% | 0.22% | 1.77% |
| ARIZONA TAX-EXEMPT FUND | After Taxes on Distributions | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 3.27% | 0.18% | 1.69% |
| ARIZONA TAX-EXEMPT FUND | After Taxes on Distributions and Sales | |||
| Prospectus [Line Items] | |||
| Average Annual Return, Percent | 3.33% | 0.80% | 1.96% |