v3.24.4
Label Element Value
Ultra Short Tax-Free Income Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading ULTRA SHORT TAX-FREE INCOME FUND
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

To generate current income exempt from federal income taxes consistent with the preservation of capital.

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Ultra Short Tax-Free Income Fund. You may qualify for sales charge discounts if you and your family invest or agree to invest in the future, at least $200,000 in Cavanal Hill Funds. More information about these and other discounts is available from your financial professional and in the section “Initial Sales Charge (Bond and Equity Funds, Class A Shares Only)” on page 43 of the prospectus and “Contingent Deferred Sales Charges (CDSC-Class A and C Only)” on page 44 in the prospectus and in the section “Additional Purchase and Redemption Information” on page 34 of the Statement of Additional Information. An investor transacting in Institutional Shares, which do not have any front-end sales charge, contingent deferred sales charge, or other asset-based fee for sales or distribution, may be required to pay a commission to a broker or other financial intermediary for effecting such transactions on an agency basis. Such commissions are not reflected in the tables or the example below. Shares of the Fund are available in other share classes that have different fees and expenses.

Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment).
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Dec. 31, 2025
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Ultra Short Tax-Free Income Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 130% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 130.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and your family invest or agree to invest in the future, at least $200,000 in Cavanal Hill Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 200,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading] rr_StrategyHeading Principal Investment Strategy
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

To pursue its objective, under normal circumstances, the Fund invests in a diversified portfolio of municipal bonds and debentures. Such debt obligations are “investment grade” or better, rated within the four highest long-term or two highest short-term rating categories assigned by a nationally recognized statistical ratings organization (“NRSRO”), with at least 65% of the Fund’s net assets invested in securities that are rated within the three highest long-term or highest short-term rating categories or, if not rated, found by the Adviser under guidelines approved by the Trust’s Board of Trustees to be of comparable quality.

If the rating of a security is downgraded after purchase, the portfolio management team will determine whether it is in the best interest of the Fund’s shareholders to continue to hold the security. In making that determination, the factors considered at the time of purchase are reviewed. The Fund does not apply an automatic sale trigger.

As a matter of fundamental policy, the Fund invests, under normal circumstances, at least 80% of its net assets in municipal securities, the income from which is both exempt from federal income tax and not subject to federal alternative minimum tax for individuals.

The Fund will generally invest in two principal classifications of municipal securities: general obligation securities and revenue securities. The Fund may also utilize credit enhancers, such as insurance. The Fund may invest in money market instruments such as short term tax-exempt notes, commercial paper, variable-rate demand notes, and money market funds.

Purchase and sale decisions are based on the Adviser’s judgment about issuers, risk, prices of securities, market conditions, potential returns, and other economic factors.

The Fund, under normal circumstances, invests at least 80% of its net assets in tax-free bonds and maintains a dollar-weighted average maturity between 1 day to 1 year. These policies will not be changed without at least 60 days’ prior notice to shareholders.

Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration under normal circumstances, at least 80% of its net assets in municipal securities, the income from which is both exempt from federal income tax and not subject to federal alternative minimum tax for individuals.
Risk [Heading] rr_RiskHeading Principal Investment Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and the performance table below illustrate some of the risks and return volatility of an investment in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for 1 and 5 years and since inception compare with those of a broad measure of market performance. The Fund’s past performance (before or after taxes) does not necessarily indicate how the Fund will perform in the future. Updated performance information may be obtained on the Fund’s website www.cavanalhillfunds.com or by calling 1-800-762-7085.

This bar chart shows changes in the Fund’s performance from year to year1. The returns for A Shares and Institutional Shares will differ from the returns for Investor Shares (which are shown in the bar chart) because of differences in the expenses of each Class.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and the performance table below illustrate some of the risks and return volatility of an investment in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual returns for 1 and 5 years and since inception compare with those of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-800-762-7085
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.cavanalhillfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance (before or after taxes) does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Annual Total Returns for Investor Shares (Periods Ended 12/31)
Bar Chart Footnotes [Text Block] rr_BarChartFootnotesTextBlock

1The performance information shown above is based on a calendar year. The Fund’s total return from 1/1/24 to 9/30/24 was 2.42%.

Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (Periods Ended 12/31/23)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The stated returns assume the highest historical federal marginal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred After-tax returns are not relevant to investors holding shares through tax-deferred programs, such as IRA or 401(k) plans. After-tax returns are shown only for the Investor Class Shares and after-tax returns for other shares will vary.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown Actual after-tax returns depend on an investor’s tax situation and may differ from those shown.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

This table compares the Fund’s average annual total returns for periods ended December 31, 2023 to those of the Bloomberg 1-Year Municipal Bond Index and the Bloomberg Municipal Bond Index, which was added in response to rule changes with a compliance date of July 24, 2024. The Bloomberg 1-Year Municipal Bond Index demonstrates how the Fund’s performance compares with the returns of indices with similar investment objectives, whereas the Bloomberg Municipal Bond Index is a broad-based index, which provides a benchmark reflecting the overall U.S. municipal bond market. The stated returns assume the highest historical federal marginal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors holding shares through tax-deferred programs, such as IRA or 401(k) plans. After-tax returns are shown only for the Investor Class Shares and after-tax returns for other shares will vary.

Ultra Short Tax-Free Income Fund | Risk Loss Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Loss of money is a risk of investing in the Fund.
Ultra Short Tax-Free Income Fund | Risk Not Insured Depository Institution [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Ultra Short Tax-Free Income Fund | Municipal Bond Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Municipal Bond Risk — Like other bonds, municipal bonds have credit risk. It is possible that the government that issued the bond will not have the funds to make timely payments of interest or principal. Municipal bonds often count on the projects they finance to bring in expected revenues and there is a risk that the projects will fail to produce the revenue needed to pay off the bonds.
Ultra Short Tax-Free Income Fund | Interest Rate Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Interest Rate Risk — The value of the Fund’s interest-bearing investments may decline due to an increase in interest rates. In general, the longer a security’s maturity, the greater the interest rate risk. For a portfolio with a duration of 3 years, each 1% rise in interest rates would reduce the value of the portfolio by an estimated 3%. The Fund’s yield may decrease due to a decline in interest rates. Very low or negative interest rates may magnify interest rate risk. Recent and any future declines in interest rate levels could cause the Fund’s earnings to fall below the Fund’s expense ratio, resulting in a negative yield and a decline in the Fund’s share price. Changing interest rates, including rates that fall below zero, may have unpredictable effects on markets, may result in heightened market volatility and may detract from Fund performance to the extent the Fund is exposed to such interest rates.
Ultra Short Tax-Free Income Fund | Credit Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Credit Risk — Credit risk is the possibility that the issuer of a debt instrument or a counterparty to an agreement fails to fulfill its obligations, reducing the Fund’s return. This includes failure by a bond issuer to repay interest and principal.
Ultra Short Tax-Free Income Fund | Credit Enhancement Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Credit Enhancement Risk — A “credit enhancer,” such as a letter of credit, may decline in quality and lead to a decrease in the value of the Fund’s investments.
Ultra Short Tax-Free Income Fund | Liquidity Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Liquidity Risk — Certain securities may be difficult or impossible to sell at the time and the price that would normally prevail in the market. The portfolio manager may have to lower the price, sell other securities instead or forego an investment opportunity, any of which could have a negative effect on Fund management or performance. This includes the risk of missing out on an investment opportunity because the assets necessary to take advantage of it are tied up in less advantageous investments. If a Fund is required to sell securities quickly or at a particular time (including sales to meet redemption requests) the Fund could realize a loss.
Ultra Short Tax-Free Income Fund | Tax Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Tax Risk — To qualify to pay exempt-interest dividends, which are treated as items of interest excludable from gross income for federal income tax purposes, at least 50% of the value of the total assets of the Fund must consist of obligations exempt from regular income tax as of the close of each quarter of the Fund’s taxable year. If the proportion of taxable investments held by the Fund exceeded 50% of the Fund’s total assets as of the close of any quarter of the Fund’s taxable year, the Fund would not, for that taxable year, satisfy the general eligibility test that would otherwise permit it to pay exempt-interest dividends for that taxable year. The issuer of securities may fail to comply with certain requirements of the Internal Revenue Code of 1986, as amended, which could cause adverse tax consequences. The Fund will invest in municipal securities in reliance at the time of purchase on an opinion of bond counsel to the issuer that the interest paid on those securities will be excludable from gross income for federal income tax purposes, and the Adviser will not independently verify that opinion. Subsequent to the Fund’s acquisition of such a municipal security, however, the security may be determined to pay, or to have paid, taxable income. As a result, the treatment of dividends previously paid or to be paid by the Fund as “exempt-interest dividends” could be adversely affected, subjecting the Fund’s shareholders to increased federal income tax liabilities. Distributions of ordinary taxable income (including any net short-term capital gain) will be taxable to shareholders as ordinary income (and not eligible for favorable taxation as “qualified dividend income”), and capital gain dividends will be taxable as long-term capital gains. The value of the Fund’s investments and its NAV may be adversely affected by changes in tax rates and policies. Because interest income from municipal securities is normally not subject to regular federal income taxation, the attractiveness of municipal securities in relation to other investment alternatives is affected by changes in federal income tax rates or changes in the tax-exempt status of interest income from municipal securities. Any proposed or actual changes in such rates or exempt status, therefore, can significantly affect the demand for and supply, liquidity and marketability of municipal securities. This could in turn affect the Fund’s NAV and ability to acquire and dispose of municipal securities at desirable yield and price levels. Additionally, the Fund is not a suitable investment for individual retirement accounts, for other tax-exempt or tax-deferred accounts or for investors who are not sensitive to the federal income tax consequences of their investments.
Ultra Short Tax-Free Income Fund | Regulatory Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Regulatory Risk — The risk that a change in laws or regulations will materially affect a security, business, sector or market. A change in laws or regulations made by the government or a regulatory body can increase the costs of operating a business, reduce the attractiveness of investment and/or change the competitive landscape. Regulatory risk also includes the risk associated with federal and state laws which may restrict the remedies that a lender has when a borrower defaults on loans. These laws include restrictions on foreclosures, redemption rights after foreclosure, federal and state bankruptcy and debtor relief laws, restrictions on “due on sale” clauses, and state usury laws.
Ultra Short Tax-Free Income Fund | Market Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Market Risk — The value of the Fund’s assets will fluctuate as the markets in which the Fund invests fluctuate. The value of the Fund’s investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events, such as inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, military conflict, acts of terrorism, social unrest, environmental disasters, natural disasters or events, recessions, supply chain disruptions, political instability, and infectious disease epidemics or pandemics.
Ultra Short Tax-Free Income Fund | Prepayment/Call Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Prepayment/Call Risk — There is a chance that the repayment of an asset-backed or mortgage-backed obligation will occur sooner than expected. Call risk is the possibility that, during periods of falling interest rates, a bond issuer will “call”— or repay — its bond before the bond’s maturity date.
Ultra Short Tax-Free Income Fund | Issuer Specific [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Issuer Specific — The value of a security may decline for a number of reasons which directly relate to the issuer, such as management performance, earnings and sales trends, investor perceptions, financial leverage or reduced demand for the issuer’s goods or services.
Ultra Short Tax-Free Income Fund | Portfolio Turnover Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Portfolio Turnover Risk — A Fund may engage in active and frequent trading to achieve its principal investment objectives. This may result in the realization and distribution to shareholders of higher capital gains as compared to a fund with less active trading policies, which would increase an investor’s tax liability unless shares are held through a tax deferred or exempt vehicle. Frequent trading also increases transaction costs, which could detract from a Fund’s performance.
Ultra Short Tax-Free Income Fund | Management Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Management Risk — There is no guarantee that the investment techniques and risk analyses used by the Fund’s portfolio managers will produce the desired results.
Ultra Short Tax-Free Income Fund | Banking Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  Banking Risk — To the extent that a Fund invests in securities issued by U.S. Banks, foreign banks or U.S. branches of foreign banks, the Fund’s performance will be susceptible to the risks associated with the financial services sector. The financial services sector is highly dependent on the supply of short-term financing. The value of securities of issuers in the banking and financial services sector can be sensitive to changes in government regulation and interest rates and to economic downturns in the United States and abroad.
Ultra Short Tax-Free Income Fund | High Yield Securities Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock •  High Yield Securities Risk — Fixed income securities rated below investment grade and unrated securities of similar credit quality (commonly referred to as “junk bonds” or high yield securities) are regarded as being predominantly speculative as to the issuer’s ability to make payments of principal and interest. Investments in such securities involve substantial risk. Issuers of high yield securities may be highly leveraged and may not have available to them more traditional methods of financing. Therefore, the risks associated with acquiring the securities of such issuers generally are greater than is the case with investment grade securities. The value of high yield securities tends to be very volatile due to such factors as specific corporate developments, interest rate sensitivity, less secondary market activity, and negative perceptions of high yield securities and the junk bond markets generally, particularly in times of market stress.
Ultra Short Tax-Free Income Fund | Bloomberg 1-Year Municipal Bond Index (reflects no deduction for expenses, fees or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for expenses, fees or taxes
Label rr_AverageAnnualReturnLabel Bloomberg 1-Year Municipal Bond Index(reflects no deduction for expenses, fees or taxes)
1 Year rr_AverageAnnualReturnYear01 3.39%
5 Years rr_AverageAnnualReturnYear05 1.35%
Since Inception rr_AverageAnnualReturnSinceInception 1.09%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 26, 2017
Ultra Short Tax-Free Income Fund | Bloomberg Municipal Bond Index (reflects no deduction for expenses, fees or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes reflects no deduction for expenses, fees or taxes
Label rr_AverageAnnualReturnLabel Bloomberg Municipal Bond Index (reflects no deduction for expenses, fees or taxes)
1 Year rr_AverageAnnualReturnYear01 6.40%
5 Years rr_AverageAnnualReturnYear05 2.25%
Since Inception rr_AverageAnnualReturnSinceInception 2.15%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 26, 2017
Ultra Short Tax-Free Income Fund | A Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 1.00%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of original purchase price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1]
Management Fees rr_ManagementFeesOverAssets 0.15%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Shareholder Servicing Fees rr_Component1OtherExpensesOverAssets 0.10%
Other Expenses rr_OtherExpensesOverAssets 1.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.43%
Less Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.83%) [2]
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.60%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 161
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 467
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 795
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,725
Label rr_AverageAnnualReturnLabel Return Before Taxes (With Load)
1 Year rr_AverageAnnualReturnYear01 2.06%
5 Years rr_AverageAnnualReturnYear05 0.49%
Since Inception rr_AverageAnnualReturnSinceInception 0.41%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 26, 2017
Ultra Short Tax-Free Income Fund | Investor Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of original purchase price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.15%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Shareholder Servicing Fees rr_Component1OtherExpensesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 1.04%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.44%
Less Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.84%) [2]
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.60%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 36
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 322
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 630
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,505
Annual Return 2018 rr_AnnualReturn2018 0.57%
Annual Return 2019 rr_AnnualReturn2019 1.22%
Annual Return 2020 rr_AnnualReturn2020 0.25%
Annual Return 2021 rr_AnnualReturn2021 (0.40%)
Annual Return 2022 rr_AnnualReturn2022 (0.19%)
Annual Return 2023 rr_AnnualReturn2023 3.01%
Year to Date Return, Label rr_YearToDateReturnLabel Fund’s total return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2024
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 2.42%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2023
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 0.98%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2022
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.80%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 3.01%
5 Years rr_AverageAnnualReturnYear05 0.77%
Since Inception rr_AverageAnnualReturnSinceInception 0.74%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 26, 2017
Ultra Short Tax-Free Income Fund | Investor Shares | Return After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 2.97%
5 Years rr_AverageAnnualReturnYear05 0.76%
Since Inception rr_AverageAnnualReturnSinceInception 0.72%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 26, 2017
Ultra Short Tax-Free Income Fund | Investor Shares | Return After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 2.60%
5 Years rr_AverageAnnualReturnYear05 0.76%
Since Inception rr_AverageAnnualReturnSinceInception 0.72%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 26, 2017
Ultra Short Tax-Free Income Fund | Institutional Shares  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of original purchase price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.15%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets
Shareholder Servicing Fees rr_Component1OtherExpensesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 1.17%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.32%
Less Fee Waivers rr_FeeWaiverOrReimbursementOverAssets (0.97%) [2]
Total Annual Fund Operating Expenses After Fee Waivers rr_NetExpensesOverAssets 0.35%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 61
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 373
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 707
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,652
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 3.24%
5 Years rr_AverageAnnualReturnYear05 1.02%
Since Inception rr_AverageAnnualReturnSinceInception 1.02%
Inception Date rr_AverageAnnualReturnInceptionDate Dec. 26, 2017
[1] Class A Shares are available with no front-end sales charge on investments of $200,000 or more. There is, however, a contingent deferred sales charge (CDSC) of 1.00% on any Class A Shares upon which a dealer concession was paid that are sold within one year of purchase.
[2] The Adviser has contractually agreed to waive fees payable to it or reimburse certain expenses so that expenses (other than extraordinary expenses and any Acquired Fund Fees and Expenses) for each Class do not exceed 0.35%, plus class-specific fees, until December 31, 2025. Affiliates of the Adviser have contractually agreed to waive all Shareholder Servicing Fees to which they are entitled. The affiliate waivers result in a reduction of the Shareholder Servicing Fee paid by all purchasers of a Class to the extent shown in the table. Contractual waivers are in place for the period through December 31, 2025 and may only be terminated or modified with the approval of the Fund’s Board of Trustees.