| Government Obligations Fund (AVR Shares) - Summary Prospectus December 3 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | December 3 2019 | |
| Government Obligations Fund (SEL, R, IS, SS, ADM, CII, CS, CAP, TR, PRM, and AVR Shares) - Prospectus December 3 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | December 3 2019 | |
| Clover Small Value Fund (A, C, R, IS, and R6 Shares) - Annual Shareholder Report November 27 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Clover Small Value Fund (A, C, R, IS, and R6 Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Clover Small Value Fund (A, C, R, IS, and R6 Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Clover Small Value Fund (A, C, R, IS, and R6 Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Equity Advantage Fund (A and IS Shares) - Annual Shareholder Report November 27 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Equity Advantage Fund (A and IS Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Equity Advantage Fund (A and IS Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Equity Advantage Fund (A and IS Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Floating Rate Strategic Income Fund (A, C, IS, and R6 Shares) - Semi-Annual Shareholder Report November 27 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Fund for U.S. Government Securities (A, B, and C Shares) - Semi-Annual Shareholder Report November 27 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| High Income Bond Fund, Inc. (A, B, C, IS, and R6 Shares) - Semi-Annual Shareholder Report November 27 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Mortgage Fund (IS and SS Shares) - Annual Shareholder Report November 27 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Municipal Bond Fund, Inc. (A, B, C, F, and IS Shares) - Semi-Annual Shareholder Report November 27 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Municipal Ultrashort Fund (A, IS, and R6 Shares) - Annual Shareholder Report November 27 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Municipal Ultrashort Fund (A, IS, and R6 Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Municipal Ultrashort Fund (A, IS, and R6 Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Municipal Ultrashort Fund (A, IS, and R6 Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Project and Trade Finance Tender Fund - Semi-Annual Shareholder Report November 27 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Prudent Bear Fund (A, C, and IS Shares) - Annual Shareholder Report November 27 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Prudent Bear Fund (A, C, and IS Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Prudent Bear Fund (A, C, and IS Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Prudent Bear Fund (A, C, and IS Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Real Return Bond Fund (A, C, and IS Shares) - Annual Shareholder Report November 27 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Real Return Bond Fund (A, C, and IS Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Real Return Bond Fund (A, C, and IS Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Real Return Bond Fund (A, C, and IS Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Select Total Return Bond Fund (IS and SS Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Select Total Return Bond Fund (IS and SS Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Select Total Return Bond Fund (IS and SS Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Short-Intermediate Total Return Bond Fund (A, IS, SS, and R6 Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Short-Intermediate Total Return Bond Fund (A, IS, SS, and R6 Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Short-Intermediate Total Return Bond Fund (A, IS, SS, and R6 Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Ultrashort Bond Fund (A, IS, SS, R6 Shares) - Prospectus November 27 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Ultrashort Bond Fund (A, IS, SS, R6 Shares) - Statement of Additional Information (SAI) November 27 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 27 2019 | |
| Ultrashort Bond Fund (A, IS, SS, R6 Shares) - Summary Prospectus November 27 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 27 2019 | |
| Ultrashort Bond Fund (A, IS, SS, and R6 Shares) - Annual Shareholder Report November 27 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | November 27 2019 | |
| Equity Income Fund, Inc. (A, B, C, F, R, and IS Shares) - Summary Prospectus November 25 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 25 2019 | |
| Equity Income Fund, Inc. (A, B, C, F, R, and IS Shares) - Prospectus November 25 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 25 2019 | |
| Equity Income Fund, Inc. (A, B, C, F, R, and IS Shares) - Statement of Additional Information (SAI) November 25 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 25 2019 | |
| Capital Income Fund (A, B, C, F, R, and IS Shares) - Prospectus November 25 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 25 2019 | |
| Capital Income Fund (A, B, C, F, R, and IS Shares) - Statement of Additional Information (SAI) November 25 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 25 2019 | |
| Capital Income Fund (A, B, C, F, R, and IS Shares) - Summary Prospectus November 25 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 25 2019 | |
| Muni and Stock Advantage Fund (A, B, C, F, and IS Shares) - Prospectus November 25 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 25 2019 | |
| Muni and Stock Advantage Fund (A, B, C, F, and IS Shares) - Statement of Additional Information (SAI) November 25 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 25 2019 | |
| Muni and Stock Advantage Fund (A, B, C, F, and IS Shares) - Summary Prospectus November 25 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 25 2019 | |
| MDT Large Cap Growth Fund (A, B, C, and IS Shares) - Summary Prospectus November 22 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 22 2019 | |
| MDT Large Cap Growth Fund (A, B, C, and IS Shares) - Prospectus November 22 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 22 2019 | |
| Emerging Markets Equity Fund (IS Shares) - Statement of Additional Information (SAI) November 18 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 18 2019 | |
| Emerging Markets Equity Fund (IS Shares) - Prospectus November 18 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Emerging Markets Equity Fund (IS Shares) - Summary Prospectus November 18 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Federated International Equity Fund (A, C, IS, and R6 Shares) - Prospectus November 18 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Federated International Equity Fund (A, C, IS, and R6 Shares) - Statement of Additional Information (SAI) November 18 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 18 2019 | |
| Federated International Equity Fund (A, C, IS, and R6 Shares) - Summary Prospectus November 18 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| International Growth Fund (IS Shares) - Prospectus November 18 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| International Growth Fund (IS Shares) - Statement of Additional Information (SAI) November 18 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 18 2019 | |
| International Growth Fund, Prospectus November 18 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Floating Rate Strategic Income Fund (A, C, IS, and R6 Shares) - Prospectus November 18 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Floating Rate Strategic Income Fund (A, C, IS, and R6 Shares) - Statement of Additional Information (SAI) November 18 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 18 2019 | |
| Floating Rate Strategic Income Fund (A, C, IS, and R6 Shares) - Summary Prospectus November 18 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Government Ultrashort Duration Fund (A, IS, SS, and R6 Shares) - Prospectus November 18 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Government Ultrashort Duration Fund (A, IS, SS, and R6 Shares) - Statement of Additional Information (SAI) November 18 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 18 2019 | |
| Government Ultrashort Duration Fund (A, IS, SS, and R6 Shares) - Summary Prospectus November 18 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Short-Intermediate Duration Municipal Trust (A, IS, and SS Shares) - Prospectus November 18 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Short-Intermediate Duration Municipal Trust (A, IS, and SS Shares) - Statement of Additional Information (SAI) November 18 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 18 2019 | |
| Short-Intermediate Duration Municipal Trust (A, IS, and SS Shares) - Summary Prospectus November 18 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Short-Term Income Fund (A, IS, SS, and R6 Shares) - Prospectus November 18 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Short-Term Income Fund (A, IS, SS, and R6 Shares) - Statement of Additional Information (SAI) November 18 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 18 2019 | |
| Short-Term Income Fund (A, IS, SS, and R6 Shares) - Summary Prospectus November 18 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 18 2019 | |
| Hermes SDG Engagement Equity Fund (A Shares) - Prospectus November 5 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 5 2019 | |
| Hermes SDG Engagement Equity Fund (A Shares) - Statement of Additional Information (SAI) November 5 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | November 5 2019 | |
| Hermes SDG Engagement Equity Fund (A Shares) - Summary Prospectus November 5 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | November 5 2019 | |
| Hermes SDG Engagement Equity Fund (C and R6 Shares) - Summary Prospectus November 5 2019 | | November 5 2019 | |
| Adjustable Rate Securities Fund (IS and SS Shares) - Prospectus October 29 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Adjustable Rate Securities Fund (IS and SS Shares) - Statement of Additional Information (SAI) October 29 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | October 29 2019 | |
| Adjustable Rate Securities Fund (IS and SS Shares) - Summary Prospectus October 29 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Adjustable Rate Securities Fund (IS and SS Shares) - Annual Shareholder Report October 29 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| Government Income Securities, Inc. (A, C, and F Shares) - Semi-Annual Shareholder Report October 29 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| High Yield Trust (A, C, IS, SS, and R6 Shares) - Semi-Annual Shareholder Report October 29 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| Michigan Intermediate Municipal Trust (A Shares) - Annual Shareholder Report October 29 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| Michigan Intermediate Municipal Trust (A Shares) - Prospectus October 29 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Michigan Intermediate Municipal Trust (A Shares) - Statement of Additional Information (SAI) October 29 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | October 29 2019 | |
| Michigan Intermediate Municipal Trust (A Shares) - Summary Prospectus October 29 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Municipal High Yield Advantage Fund (A, B, C, F, and IS Shares) - Prospectus October 29 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Municipal High Yield Advantage Fund (A, B, C, F, and IS Shares) - Statement of Additional Information (SAI) October 29 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | October 29 2019 | |
| Municipal High Yield Advantage Fund (A, B, C, F, and IS Shares) - Summary Prospectus October 29 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Municipal High Yield Advantage Fund (A, B, C, F, and IS Shares) -Annual Shareholder Report October 29 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| Municipal High Yield Advantage Fund (T Shares) - Summary Prospectus October 29 2019 | | October 29 2019 | |
| Ohio Municipal Income Fund (A and F Shares) - Annual Shareholder Report October 29 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| Ohio Municipal Income Fund (A and F Shares) - Prospectus October 29 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Ohio Municipal Income Fund (A and F Shares) - Statement of Additional Information (SAI) October 29 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | October 29 2019 | |
| Ohio Municipal Income Fund (A and F Shares) - Summary Prospectus October 29 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Pennsylvania Municipal Income Fund (A Shares) - Annual Shareholder Report October 29 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| Pennsylvania Municipal Income Fund (A Shares) - Prospectus October 29 2019 | The fund's Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Pennsylvania Municipal Income Fund (A Shares) - Statement of Additional Information (SAI) October 29 2019 | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | October 29 2019 | |
| Pennsylvania Municipal Income Fund (A Shares) - Summary Prospectus October 29 2019 | The fund's Summary Prospectus contains information including the fund's investment objective and strategies, principal investments, risks of investing in the fund, and sales charges, management fees and other expenses. | October 29 2019 | |
| Short-Intermediate Total Return Bond Fund (A, IS, SS, and R6 Shares) - Annual Shareholder Report October 29 2019 | The fund's annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| Total Return Government Bond Fund (IS, SS, and R6 Shares) - Semi-Annual Shareholder Report October 29 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |
| U.S. Government Securities Fund: 1-3 Years (IS, SS, and Y Shares) - Semi-Annual Shareholder Report October 29 2019 | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | October 29 2019 | |