Load [Member] Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Kentucky Tax-Free Income Series | Kentucky Tax-Free Income Series | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 3.86% | 0.81% | 5.16% | (8.17%) | 1.87% | 4.34% | 6.70% | 0.95% | 4.19% | 0.28% |