Federated Hermes Short-Intermediate Municipal Fund S000009085 [Member] A C000037571 [Member] IS C000024677 [Member] SS C000024678 [Member] S&P Municipal Bond Index(reflects no deduction for fees, expenses or taxes)[Member] S&P Municipal Bond Short Index(reflects no deduction for fees, expenses or taxes)[Member] S&P Municipal Bond 1-5 Years InvestmentGrade 5% Pre-Refunded Index(reflects no deduction for fees, expenses or taxes)[Member] Morningstar U.S. Fund Muni National Short Funds Category Average[Member] Tax Exempt Securities Risk [Member] Interest Rate Risk [Member] Issuer Credit Risk [Member] Counterparty Risk [Member] Liquidity Risk [Member] Tax Risk [Member] Leverage Risk [Member] Call Risk [Member] Sector Risk [Member] Prepayment and Extension Risk [Member] Credit Enhancement Risk [Member] Risk Associated with Noninvestment Grade Securities [Member] Risk Related to the Economy [Member] Risk of Investing in Derivative Contracts and Hybrid Instruments [Member] Exchange Traded Funds Risk [Member] Technology Risk [Member]