v3.26.1
Investment Strategy
Apr. 30, 2026
Wilmington Large-Cap Strategy Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
Under normal circumstances, the Fund invests at least 80% of the value of its net assets in a diversified portfolio of U.S. equity (or equity-related) securities of large-cap companies (primarily common stocks). Large-cap companies are companies that have a market capitalization at least equal to that of the smallest company in the Russell 1000® Index ($2.8 billion as of June 30, 2026), or at least equal to that of the smallest company expected to be included in the Russell 1000® Index after its next scheduled reconstitution.
The Fund’s investment advisor determines the tactical allocation of the Fund’s assets based on forecasts of asset risk and return profiles derived from a combination of fundamental, quantitative and macroeconomic inputs. The tactical allocations may be based on one or more factors, such as economic sector, industry, investment style (e.g., growth or value), market capitalization (e.g., mega-cap or large/midcap), or security valuation measure (e.g., price/earnings ratio). Currently, the investment advisor’s tactical allocation is based primarily on the economic sectors of the Fund’s benchmark index (Russell 1000® Index).
Once the investment advisor determines the tactical allocations, the sub-advisor uses quantitative models to construct a portfolio by investing in a representative sample of securities having the factor characteristic, or belonging to the
sector/industry of the benchmark index (or another index of large-capitalization companies) to which the investment advisor has made an allocation, weighted in accordance with that allocation. The return for each component of the portfolio is intended to correlate closely with the return for the corresponding component of the applicable benchmark index. The sub-advisor will use quantitative analytical tools to rebalance the portfolio and to make buy and sell decisions on individual securities. There is no assurance that the sub-advisor’s investment performance will equal or exceed that of the benchmark index.
From time to time the Fund may have a focused investment (i.e., investment exposure comprising more than 25% of its total assets) in one or more particular sectors. As of April 30, 2026, the Fund had a focused investment in the information technology sector.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] Large-cap companies are companies that have a market capitalization at least equal to that of the smallest company in the Russell 1000® Index ($2.8 billion as of June 30, 2026), or at least equal to that of the smallest company expected to be included in the Russell 1000® Index after its next scheduled reconstitution.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]
The Fund’s investment advisor determines the tactical allocation of the Fund’s assets based on forecasts of asset risk and return profiles derived from a combination of fundamental, quantitative and macroeconomic inputs. The tactical allocations may be based on one or more factors, such as economic sector, industry, investment style (e.g., growth or value), market capitalization (e.g., mega-cap or large/midcap), or security valuation measure (e.g., price/earnings ratio). Currently, the investment advisor’s tactical allocation is based primarily on the economic sectors of the Fund’s benchmark index (Russell 1000® Index).
Rule 35d-1 Eighty Percent Investment Policy [Text Block] Under normal circumstances, the Fund invests at least 80% of the value of its net assets in a diversified portfolio of U.S. equity (or equity-related) securities of large-cap companies (primarily common stocks).
Wilmington International Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund seeks to achieve its investment goal by investing, under normal circumstances, at least 80% of the value of its net assets in a diversified portfolio of foreign securities including those domiciled in emerging markets. The Fund may invest in common stocks, preferred shares, depositary receipts, equity-linked instruments of all capitalizations, and exchange-traded funds (“ETFs”). The Fund invests primarily in the equity markets listed in the Morgan Stanley Capital International All Country World Index ex US (“MSCI ACWI ex-US Net”) Index, the benchmark against which the Fund measures the performance of its portfolio.
Subject to the oversight of the Board, Wilmington Funds Management Corporation (“WFMC” or the “Advisor”) seeks to achieve the Fund’s investment goal by retaining Wellington Management Company LLP (“Wellington”) to manage the Fund’s assets. The Advisor also engages Wilmington Trust Investment Advisors, Inc. (“WTIA”) to oversee Wellington, to monitor portfolio risk and, on a discretionary basis, to develop strategic exposure objectives and risk parameters for the Fund based on considerations such as macroeconomic outlook, relative valuation levels and volatility in the markets, market flows and market liquidity, and information relating to business cycles, as well as input from Wellington.
Based on the strategic exposure objectives and risk parameters established by WTIA, Wellington constructs an actively managed, diversified portfolio of foreign equity securities. Based on the objectives and parameters developed by WTIA, Wellington will allocate and reallocate the portfolio among a selection of independent equity management teams within Wellington. Each team pursues its own investment strategy or style, such as geography/region, growth/value, market capitalization, event-driven, economic sector, industry, or valuation measure.
In combining equity management teams and strategies, Wellington uses a number of proprietary analytical tools, including market environments analysis, extreme events analysis, stress testing, and simulation analysis. Through the strategy selection process, Wellington seeks to construct a portfolio comprised of a diversified group of long-only equity strategies with differing investment approaches that provides an overall exposure, consistent with WTIA’s exposure objectives and risk parameters, comparable to the broader equity market and that reduces exposure to the risks typically associated with any single investment approach. The underlying Wellington equity management teams have complete discretion and responsibility for security selection and portfolio construction decisions within their respective portions of the Fund’s portfolio within the constraints of the
Fund’s investment goal, strategies and restrictions. The Fund may engage in active and frequent trading as part of its investment strategy.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]
The Fund seeks to achieve its investment goal by investing, under normal circumstances, at least 80% of the value of its net assets in a diversified portfolio of foreign securities including those domiciled in emerging markets. The Fund may invest in common stocks, preferred shares, depositary receipts, equity-linked instruments of all capitalizations, and exchange-traded funds (“ETFs”). The Fund invests primarily in the equity markets listed in the Morgan Stanley Capital International All Country World Index ex US (“MSCI ACWI ex-US Net”) Index, the benchmark against which the Fund measures the performance of its portfolio.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]
Subject to the oversight of the Board, Wilmington Funds Management Corporation (“WFMC” or the “Advisor”) seeks to achieve the Fund’s investment goal by retaining Wellington Management Company LLP (“Wellington”) to manage the Fund’s assets. The Advisor also engages Wilmington Trust Investment Advisors, Inc. (“WTIA”) to oversee Wellington, to monitor portfolio risk and, on a discretionary basis, to develop strategic exposure objectives and risk parameters for the Fund based on considerations such as macroeconomic outlook, relative valuation levels and volatility in the markets, market flows and market liquidity, and information relating to business cycles, as well as input from Wellington.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] The Fund seeks to achieve its investment goal by investing, under normal circumstances, at least 80% of the value of its net assets in a diversified portfolio of foreign securities including those domiciled in emerging markets.
Wilmington Enhanced Dividend Income Strategy Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
Under normal circumstances, the Fund invests at least 80% of the value of its net assets in securities that produce dividend income. The Fund’s strategy targets a portfolio level dividend yield of two times the S&P 500 dividend yield and seeks capital appreciation over a multi-year investment horizon principally through investments in U.S. large cap stocks, while maintaining low volatility versus the broader U.S. large-cap equity market. Volatility for purposes of the Fund’s investment objective is measured by beta, standard deviation, and/or down-market capture as compared to the U.S. large-cap equity market as measured by the Russell 1000® Value Index. Although the Fund’s strategy is focused principally on U.S. large cap stocks, the Fund may have holdings of non-U.S. and non-large cap stocks. The strategy also strives to minimize drawdowns during significant negative market environments.
Quantitative and qualitative elements are interwoven throughout the Sub-Advisor’s (Wilmington Trust Investment Advisors, Inc., or “WTIA”) process to identify high-quality, high-dividend paying purchase candidates for the portfolio. Quantitative screening and proprietary modeling defines, narrows, and prioritizes investment candidates for fundamental analysis. Quantitative screening criteria include, but are not limited to: minimum yield screening criteria versus the S&P 500 and dividend safety screening measures such as free cash flow and dividend reduction history. Fundamental analysis is employed to further test the strength of investment candidates’ competitive positioning, financial condition, and alignment of management incentives. The portfolio is constructed based on a bottom-up methodology with a top-down overlay, using a team-based approach to select high-conviction portfolios with limited sector exposures and position sizing consisting of generally 35-55 positions. All positions are continually monitored, with performance measured both on an absolute and relative basis.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]
Under normal circumstances, the Fund invests at least 80% of the value of its net assets in securities that produce dividend income. The Fund’s strategy targets a portfolio level dividend yield of two times the S&P 500 dividend yield and seeks capital appreciation over a multi-year investment horizon principally through investments in U.S. large cap stocks, while maintaining low volatility versus the broader U.S. large-cap equity market. Volatility for purposes of the Fund’s investment objective is measured by beta, standard deviation, and/or down-market capture as compared to the U.S. large-cap equity market as measured by the Russell 1000® Value Index. Although the Fund’s strategy is focused principally on U.S. large cap stocks, the Fund may have holdings of non-U.S. and non-large cap stocks. The strategy also strives to minimize drawdowns during significant negative market environments.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block] The Fund’s strategy targets a portfolio level dividend yield of two times the S&P 500 dividend yield and seeks capital appreciation over a multi-year investment horizon principally through investments in U.S. large cap stocks, while maintaining low volatility versus the broader U.S. large-cap equity market.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] Under normal circumstances, the Fund invests at least 80% of the value of its net assets in securities that produce dividend income.
Wilmington Global Alpha Equities Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund invests at least 80%, under normal circumstances, of the value of its net assets in equity securities. The Fund will invest in publicly-traded equity securities, including common stock, preferred stock and depositary receipts, of companies of all market capitalizations. The Fund may invest up to 70% of its assets in the equity securities of non-U.S. issuers, including companies that conduct their principal business activities in emerging markets or whose securities are traded principally on exchanges in emerging markets. The Fund may also invest in exchange-traded funds, futures contracts on broad-based equity indexes and other derivatives.
Alpha” refers to the potential for returns that are attributable to active investment judgment, including investment research, manager selection, security selection, asset allocation, portfolio construction, risk management, or other investment techniques, as distinct from returns attributable solely to broad market movements. The term is intended to describe the Fund’s investment concept and does not imply that the Fund will achieve positive returns, outperform any benchmark, or avoid losses.
Wilmington Funds Management Corporation (“WFMC” or the “Advisor”) seeks to achieve the Fund’s investment goal by retaining Wellington Management Company LLP (“Wellington”), to manage the Fund’s assets. The Advisor also engages Wilmington Trust Investment Advisors, Inc. (“WTIA”) to oversee Wellington, to monitor portfolio risk and, on a discretionary basis, to develop strategic exposure objectives and risk parameters for the Fund based on considerations such as macroeconomic outlook, relative valuation levels and volatility in the markets, market flows and market liquidity, and information relating to business cycles, as well as input from Wellington.
Based on the strategic exposure objectives and risk parameters established by WTIA, Wellington constructs an actively managed, global and diversified portfolio of equity securities, and implements an index-based hedging strategy in an effort to reduce market exposure, moderate portfolio volatility and limit the severity of portfolio losses in times of market downturns.
Based on the objectives and parameters developed by WTIA, Wellington will allocate and reallocate the portfolio among a selection of independent equity management teams within Wellington. Each team pursues its own investment strategy or style, such as geography/region, growth/value, market capitalization, event-driven, economic sector, industry, or valuation measure.
In combining equity management teams and strategies, Wellington uses a number of proprietary analytical tools,
including market environments analysis, extreme events analysis, stress testing, and simulation analysis. Through the strategy selection process, Wellington seeks to construct a portfolio comprised of a diversified group of long-only equity strategies with differing investment approaches that provides an overall exposure, consistent with WTIA’s exposure objectives and risk parameters, comparable to the broader equity market and that reduces exposure to the risks typically associated with any single investment approach. The underlying Wellington equity management teams have complete discretion and responsibility for security selection and portfolio construction decisions within their respective portions of the Fund’s portfolio within the constraints of the Fund’s investment goal, strategies and restrictions. The Fund may engage in active and frequent trading as part of its principal investment strategy.
Wellington will implement the hedging strategy by investing a portion of the Fund’s net assets in futures contracts on broad-based equity indexes, the constituents of which include the types of securities in which the Fund invests directly, and in cash, cash equivalents and short-term debt instruments to satisfy applicable margin requirements for the Fund’s derivatives positions. The net market exposure (sum of long and synthetic short positions including cash) of the Fund is expected to range generally between 35% to 55% of the net asset value of the Fund, depending on WTIA’s analysis of prevailing market conditions, although the exposure may fall outside of this range. The Fund’s short exposure will be achieved through the use of equity index futures or other derivative exposures. Wellington may also invest in a variety of other derivative instruments, such as swaps, forwards, other futures contracts and options, in order to implement the hedging strategy, to hedge foreign currency risk, and to gain equity-like exposure in certain markets.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] The Fund will invest in publicly-traded equity securities, including common stock, preferred stock and depositary receipts, of companies of all market capitalizations.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block] The Fund may invest up to 70% of its assets in the equity securities of non-U.S. issuers, including companies that conduct their principal business activities in emerging markets or whose securities are traded principally on exchanges in emerging markets. The Fund may also invest in exchange-traded funds, futures contracts on broad-based equity indexes and other derivatives.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] The Fund invests at least 80%, under normal circumstances, of the value of its net assets in equity securities.
Wilmington Real Asset Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund, under normal circumstances, invests at least 80% of the value of its net assets in “real return” assets consisting of (i) global inflation-protected debt securities, (ii) global real-estate related securities, and (iii) commodity/natural resource-related securities. Global inflation-protected debt securities may include foreign government securities.
The Fund considers a company to be a real estate company if at least 50% of its assets, gross income or net profits is derived from (i) development, ownership, leasing, financing, construction, management or sale of real estate or (ii) products and services that are related to the real estate industry, such as manufacturers and distributors of building supplies and financial institutions which issue or service mortgages.
The Fund will invest in real estate companies, such as real estate investment trusts (“REITs”) that own property and mortgage REITs that make construction and development loans or invest in mortgage pools, or companies whose products and services relate to the real estate industry. The Fund may invest its assets in equity, debt or convertible securities of companies whose products and services are related to the real estate industry or in securities whose products and services are related to the real estate industry.
In order to gain exposure to the commodities markets without investing directly in physical commodities, the Fund can invest in investment companies, exchange-traded funds (“ETFs”), futures contracts, forward currency exchange contracts, currency futures and swap agreements. The Fund’s anticipated use of futures contracts, forward currency exchange contracts, currency futures and swap agreements may at times be substantial.
Wilmington Funds Management Corporation (“WFMC” or the “Advisor”) seeks to achieve the Fund’s investment goal by retaining sub-advisors to manage the Fund’s assets. The Advisor determines the overall tactical allocation for the Fund, and engages Wilmington Trust Investment Advisors, Inc. (“WTIA”) as the Fund’s principal Sub-Advisor, to allocate and reallocate assets of the Fund among the Fund’s sub-advisors. WTIA may invest directly in cash or cash equivalents and repurchase agreements secured by U.S. Government securities. The Fund may also invest in common stocks, preferred stocks and convertible securities of issuers in commodity-related industries to gain exposure to the commodities markets. The Fund may also invest in master limited partnerships (“MLPs”) indirectly through other investment vehicles, such as open-end investment companies.
The Fund’s principal Sub-Advisor, WTIA, determines the Fund’s asset allocation among the “real return” assets. WTIA anticipates allocating approximately up to 80% of the Fund’s assets in inflation-protected debt securities, up to 80% of the Fund’s assets in real estate-related securities and up to 60% of the Fund’s assets in commodity/natural resource-related securities. The allocations and/or actual holdings will vary from time to time.
The Fund utilizes a multi-manager strategy in which the principal Sub-Advisor, WTIA, allocates and reallocates varying portions of the Fund’s assets among sub-advisors, or invests directly (up to 80% of the Fund’s net assets) in ETFs or other instruments in pursuit of the Fund’s investment strategies. Subject to the supervision of the Advisor, each sub-advisor acts independently from the others and utilizes its own distinct investment style in buying and selling securities within the constraints of the Fund’s investment goal, strategies and restrictions. The Fund may invest in securities of small-cap companies and may invest up to 55% of its assets in foreign securities. The Fund may engage in active and frequent trading as part of its principal investment strategy.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] Global inflation-protected debt securities may include foreign government securities.
The Fund considers a company to be a real estate company if at least 50% of its assets, gross income or net profits is derived from (i) development, ownership, leasing, financing, construction, management or sale of real estate or (ii) products and services that are related to the real estate industry, such as manufacturers and distributors of building supplies and financial institutions which issue or service mortgages.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]
The Fund will invest in real estate companies, such as real estate investment trusts (“REITs”) that own property and mortgage REITs that make construction and development loans or invest in mortgage pools, or companies whose products and services relate to the real estate industry. The Fund may invest its assets in equity, debt or convertible securities of companies whose products and services are related to the real estate industry or in securities whose products and services are related to the real estate industry.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] The Fund, under normal circumstances, invests at least 80% of the value of its net assets in “real return” assets consisting of (i) global inflation-protected debt securities, (ii) global real-estate related securities, and (iii) commodity/natural resource-related securities.
Strategy Portfolio Concentration [Text] The Fund, under normal circumstances, invests at least 80% of the value of its net assets in “real return” assets consisting of (i) global inflation-protected debt securities, (ii) global real-estate related securities, and (iii) commodity/natural resource-related securities. Global inflation-protected debt securities may include foreign government securities.
Wilmington Broad Market Bond Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund seeks to achieve its investment goal by investing primarily in U.S. investment grade corporate and government fixed income securities, including mortgage and asset backed securities. Under normal circumstances, the Fund invests at least 80% of the value of its net assets in fixed income securities. The Fund’s investment advisor will generally select investment grade fixed income securities and unrated securities determined to be of comparable quality, but also may invest up to 5% of the Fund’s total assets in lower-rated debt securities (“junk bonds”). The Fund seeks to maintain a dollar-weighted average maturity of four to ten years. However, the dollar-weighted average maturity of the Fund’s investments will vary depending on market conditions.
Broad Market” refers to the broad fixed income universe from which the Fund may select investments, rather than to any single fixed income sector, issuer type, maturity range, duration profile, credit quality, or investment style. The broad fixed income universe may include, among others, U.S. Government obligations, corporate debt securities, mortgage-backed securities, asset-backed securities, municipal securities, and other debt obligations. The term is intended to describe the breadth of the Fund’s eligible fixed income opportunity set and does not require exposure to all segments of that universe at any given time.
In selecting securities for the Fund, the investment advisor considers a security’s credit quality, capital appreciation potential, maturity and yield to maturity. The investment advisor will monitor changing economic conditions and trends, including interest rates, and may sell securities in anticipation of an increase in interest rates or purchase securities in anticipation of a decrease in interest rates.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] The Fund seeks to achieve its investment goal by investing primarily in U.S. investment grade corporate and government fixed income securities, including mortgage and asset backed securities.The Fund’s investment advisor will generally select investment grade fixed income securities and unrated securities determined to be of comparable quality, but also may invest up to 5% of the Fund’s total assets in lower-rated debt securities (“junk bonds”). The Fund seeks to maintain a dollar-weighted average maturity of four to ten years. However, the dollar-weighted average maturity of the Fund’s investments will vary depending on market conditions.“Broad Market” refers to the broad fixed income universe from which the Fund may select investments, rather than to any single fixed income sector, issuer type, maturity range, duration profile, credit quality, or investment style. The broad fixed income universe may include, among others, U.S. Government obligations, corporate debt securities, mortgage-backed securities, asset-backed securities, municipal securities, and other debt obligations. The term is intended to describe the breadth of the Fund’s eligible fixed income opportunity set and does not require exposure to all segments of that universe at any given time.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block] The Fund’s investment advisor will generally select investment grade fixed income securities and unrated securities determined to be of comparable quality, but also may invest up to 5% of the Fund’s total assets in lower-rated debt securities (“junk bonds”). The Fund seeks to maintain a dollar-weighted average maturity of four to ten years. However, the dollar-weighted average maturity of the Fund’s investments will vary depending on market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] Under normal circumstances, the Fund invests at least 80% of the value of its net assets in fixed income securities.
Wilmington Municipal Bond Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
Under normal circumstances, the Fund invests at least 80% of the value of its net assets in municipal securities that provide interest exempt from federal income tax. However, the income on these securities may be subject to the federal alternative minimum tax (“AMT”). The Fund may invest up to 20% of its assets in other types of fixed income securities that provide income that is subject to federal income tax. Additionally, the Fund may invest in exchange-traded funds (“ETFs”). The Fund generally invests in securities rated in the top four categories by a rating agency such as Moody’s Investors Service, Inc. (“Moody’s”) or Standard & Poor’s Corporation (“S&P”) or if unrated, determined by the investment advisor to be of comparable quality, but also may invest up to 10% of the Fund’s total assets in lower-rated debt securities (“junk bonds”). The Fund seeks to maintain a weighted average maturity of three to ten years. However, the Fund has no maturity restrictions on individual issues, and the weighted average maturity of the Fund’s portfolio will vary depending on market conditions.
The Fund may invest more than 25% of its assets in securities relating to one political subdivision, such as any state or U.S. territory. The Fund may focus its investments in sectors of the municipal securities market, such as healthcare or housing. There are no limitations on the Fund’s investment in any one of the three general categories of municipal obligations: general obligation bonds, special revenue bonds and private activity bonds.
In selecting securities, the Fund’s investment advisor focuses on credit analysis, the relative values of different sectors of the market, geographic diversity and securities with different and potentially advantageous structures. The investment advisor seeks to construct a portfolio with substantially the same interest rate exposure as the Standard & Poor’s Investment Grade Intermediate Municipal Bond Index, and does not select securities based on forecasts of interest rates.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]
Under normal circumstances, the Fund invests at least 80% of the value of its net assets in municipal securities that provide interest exempt from federal income tax. However, the income on these securities may be subject to the federal alternative minimum tax (“AMT”). The Fund may invest up to 20% of its assets in other types of fixed income securities that provide income that is subject to federal income tax. Additionally, the Fund may invest in exchange-traded funds (“ETFs”). The Fund generally invests in securities rated in the top four categories by a rating agency such as Moody’s Investors Service, Inc. (“Moody’s”) or Standard & Poor’s Corporation (“S&P”) or if unrated, determined by the investment advisor to be of comparable quality, but also may invest up to 10% of the Fund’s total assets in lower-rated debt securities (“junk bonds”). The Fund seeks to maintain a weighted average maturity of three to ten years. However, the Fund has no maturity restrictions on individual issues, and the weighted average maturity of the Fund’s portfolio will vary depending on market conditions.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block] However, the income on these securities may be subject to the federal alternative minimum tax (“AMT”). The Fund may invest up to 20% of its assets in other types of fixed income securities that provide income that is subject to federal income tax. Additionally, the Fund may invest in exchange-traded funds (“ETFs”). The Fund generally invests in securities rated in the top four categories by a rating agency such as Moody’s Investors Service, Inc. (“Moody’s”) or Standard & Poor’s Corporation (“S&P”) or if unrated, determined by the investment advisor to be of comparable quality, but also may invest up to 10% of the Fund’s total assets in lower-rated debt securities (“junk bonds”). The Fund seeks to maintain a weighted average maturity of three to ten years. However, the Fund has no maturity restrictions on individual issues, and the weighted average maturity of the Fund’s portfolio will vary depending on market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] Under normal circumstances, the Fund invests at least 80% of the value of its net assets in municipal securities that provide interest exempt from federal income tax.
Wilmington New York Municipal Bond Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund seeks to achieve its investment goal, under normal circumstances, by investing its net assets so that at least 80% of the income it distributes will be exempt from federal regular income tax and personal income tax imposed by the State of New York and New York municipalities. However, the income on these securities may be subject to the federal alternative minimum tax (“AMT”). The Fund generally invests in investment grade municipal securities. The Fund seeks to maintain a weighted average maturity of three to ten years. However, the Fund has no maturity restrictions on individual issues, and the weighted average maturity of the Fund’s portfolio will vary depending on market conditions.
In selecting securities, the Fund’s investment advisor focuses on credit analysis, the relative values of different sectors of the market, geographic diversity and securities with different and potentially advantageous structures. The
investment advisor seeks to construct a portfolio with substantially the same interest rate exposure as the Standard & Poor’s Investment Grade Intermediate Municipal Bond Index, and does not select securities based on forecasts of interest rates.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]
The Fund seeks to achieve its investment goal, under normal circumstances, by investing its net assets so that at least 80% of the income it distributes will be exempt from federal regular income tax and personal income tax imposed by the State of New York and New York municipalities. However, the income on these securities may be subject to the federal alternative minimum tax (“AMT”). The Fund generally invests in investment grade municipal securities. The Fund seeks to maintain a weighted average maturity of three to ten years. However, the Fund has no maturity restrictions on individual issues, and the weighted average maturity of the Fund’s portfolio will vary depending on market conditions.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block] However, the income on these securities may be subject to the federal alternative minimum tax (“AMT”). The Fund generally invests in investment grade municipal securities. The Fund seeks to maintain a weighted average maturity of three to ten years. However, the Fund has no maturity restrictions on individual issues, and the weighted average maturity of the Fund’s portfolio will vary depending on market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] The Fund seeks to achieve its investment goal, under normal circumstances, by investing its net assets so that at least 80% of the income it distributes will be exempt from federal regular income tax and personal income tax imposed by the State of New York and New York municipalities.
Wilmington U.S. Government Money Market Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund operates as a “Government Money Market Fund,” as defined in Rule 2a-7 under the Investment Company Act of 1940, as amended. This means that the Fund invests at least 99.5% of its total assets in (1) U.S. government securities, (2) repurchase agreements that are collateralized fully by U.S. government securities or cash, (3) cash, and/or (4) other money market mutual funds that operate as Government Money Market Funds. Under normal circumstances, the Fund invests at least 80% of its net assets in U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities. A U.S. government security generally means any security issued or guaranteed as to principal or interest by the United States, or by a person controlled or supervised by and acting as an instrumentality of the government of the United States. In contrast to the Fund’s 99.5% policy, the Fund’s 80% policy does not include cash or repurchase agreements collateralized by cash. While the Board of Trustees may elect to impose a fee upon the sale of your shares, the Board has not elected to do so at this time. Should the Board elect to do so, such change would only become effective after shareholders were provided with specific advance notice of the change in the Fund’s policy and provided with the opportunity to redeem their shares in accordance with Rule 2a-7 before the policy change became effective.
In selecting securities for the Fund, the investment advisor considers factors such as current yield, the anticipated level of interest rates, and the maturity of the instrument relative to the maturity of the entire Fund. In addition, the Fund may purchase only securities that meet certain SEC requirements relating to maturity, diversification and credit quality, and must meet certain SEC requirements relating to portfolio liquidity. Under these requirements, the Fund’s securities must have remaining maturities of 397 calendar days or less, and the Fund must have a dollar-weighted average maturity of 60 calendar days or less and a dollar-weighted average life of 120 calendar days or less.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] A U.S. government security generally means any security issued or guaranteed as to principal or interest by the United States, or by a person controlled or supervised by and acting as an instrumentality of the government of the United States.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block] In selecting securities for the Fund, the investment advisor considers factors such as current yield, the anticipated level of interest rates, and the maturity of the instrument relative to the maturity of the entire Fund. In addition, the Fund may purchase only securities that meet certain SEC requirements relating to maturity, diversification and credit quality, and must meet certain SEC requirements relating to portfolio liquidity. Under these requirements, the Fund’s securities must have remaining maturities of 397 calendar days or less, and the Fund must have a dollar-weighted average maturity of 60 calendar days or less and a dollar-weighted average life of 120 calendar days or less.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] Under normal circumstances, the Fund invests at least 80% of its net assets in U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities.
Wilmington U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund operates as a “Government Money Market Fund,” as defined in Rule 2a-7 under the Investment Company Act of 1940, as amended. This means that the Fund invests at least 99.5% of its total assets in (1) U.S. government securities, (2) repurchase agreements that are collateralized fully by U.S. government securities or cash, (3) cash, and/or (4) other money market mutual funds that operate as Government Money Market Funds. Under normal circumstances, the Fund invests at least 80% of its net assets in U.S. treasury securities and repurchase agreements that are fully collateralized by U.S. treasury securities. A U.S. treasury security generally means any security issued or guaranteed as to principal or interest by the U.S. Treasury and are supported by the full faith and credit of the United States. In contrast to the Fund’s 99.5% policy, the Fund’s 80% policy does not include cash or repurchase agreements collateralized by cash. While the Board of Trustees may elect to impose a fee upon the sale of your shares, the Board has not elected to do so at this time. Should the Board elect to do so, such change would only become effective after shareholders were provided with specific advance notice of the change in the Fund’s policy and provided with the opportunity to redeem their shares in accordance with Rule 2a-7 before the policy change became effective.
In selecting securities for the Fund, the investment advisor considers factors such as current yield, the anticipated level of interest rates, and the maturity of the instrument relative to the maturity of the entire Fund. In addition, the Fund may purchase only securities that meet certain SEC requirements relating to maturity, diversification and credit quality, and must meet certain SEC requirements relating to portfolio liquidity. Under these requirements, the Fund’s securities must have remaining maturities of 397 calendar days or less, and the Fund must have a dollar-weighted average maturity of 60 calendar days or less and a dollar-weighted average life of 120 calendar days or less.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] A U.S. treasury security generally means any security issued or guaranteed as to principal or interest by the U.S. Treasury and are supported by the full faith and credit of the United States.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]
In selecting securities for the Fund, the investment advisor considers factors such as current yield, the anticipated level of interest rates, and the maturity of the instrument relative to the maturity of the entire Fund. In addition, the Fund may purchase only securities that meet certain SEC requirements relating to maturity, diversification and credit quality, and must meet certain SEC requirements relating to portfolio liquidity. Under these requirements, the Fund’s securities must have remaining maturities of 397 calendar days or less, and the Fund must have a dollar-weighted average maturity of 60 calendar days or less and a dollar-weighted average life of 120 calendar days or less.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] Under normal circumstances, the Fund invests at least 80% of its net assets in U.S. treasury securities and repurchase agreements that are fully collateralized by U.S. treasury securities.