Shareholder Report, Line Graph (Details) - USD ($) |
12 Months Ended | 24 Months Ended | 36 Months Ended | 48 Months Ended | 60 Months Ended | 72 Months Ended | 84 Months Ended | 96 Months Ended | 108 Months Ended | 120 Months Ended | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 31, 2016 |
Aug. 31, 2026 |
Aug. 31, 2017 |
Aug. 31, 2018 |
Aug. 31, 2019 |
Aug. 31, 2020 |
Aug. 31, 2021 |
Aug. 31, 2022 |
Aug. 31, 2023 |
Aug. 31, 2024 |
Aug. 31, 2025 |
Aug. 31, 2026 |
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| C000135933 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Nomura Tax-Free Pennsylvania Fund (Institutional Class) – including sales charge | |||||||||||
| Accumulated Value | $ 10,000 | $ 10,063.25 | $ 10,180.43 | $ 11,008.4 | $ 11,212.38 | $ 12,040.7 | $ 10,926.22 | $ 10,984.42 | $ 12,069.44 | $ 11,678.77 | $ 12,430.04 | |
| C000006344 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Nomura Tax-Free Pennsylvania Fund (Class C) – including sales charge | |||||||||||
| Accumulated Value | 10,000 | 9,966.08 | 9,982.28 | 10,673.73 | 10,775.86 | 11,453.9 | 10,277.69 | 10,244.03 | 11,128.57 | 10,661.38 | 11,234.65 | |
| C000006342 [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Nomura Tax-Free Pennsylvania Fund (Class A) – including sales charge | |||||||||||
| Accumulated Value | 9,550 | 9,583.1 | 9,671.62 | 10,420.02 | 10,600.24 | 11,354.58 | 10,265.99 | 10,295.5 | 11,284.99 | 10,892.91 | 11,565.18 | |
| Bloomberg Municipal Bond Index [Member] | ||||||||||||
| Account Value [Line Items] | ||||||||||||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | |||||||||||
| Accumulated Value | $ 10,000 | $ 10,088 | $ 10,138 | $ 11,022 | $ 11,378 | $ 11,765 | $ 10,749 | $ 10,932 | $ 11,598 | $ 11,607 | $ 12,085 | |