| Tax-Free Obligations Fund (AVR Shares) - Statement of Additional Information (SAI) | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | | |
| Tax-Free Obligations Fund (AVR Shares) - Prospectus | 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. | | |
| Tax-Free Obligations Fund (AVR Shares) - Summary Prospectus | 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. | | |
| Prime Cash Obligations Fund (AVR Shares) - Summary Prospectus | 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. | | |
| Government Obligations Fund (AVR Shares) - Statement of Additional Information (SAI) | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | | |
| Government Obligations Fund (AVR Shares) - Summary Prospectus | 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. | | |
| Prime Cash Obligations Fund (AVR Shares) - Statement of Additional Information (SAI) | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | | |
| Government Obligations Fund (AVR Shares) - Prospectus | 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. | | |
| Prime Cash Obligations Fund (AVR Shares) - Prospectus | 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. | | |
| Absolute Return Fund (A, B, C, and IS Shares) - Summary Prospectus | 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. | | |
| Institutional High Yield Bond Fund (IS and R6 Shares) - Summary Prospectus | 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. | | |
| MDT Large Cap Value Fund (A, B, C, R, IS, SS, and R6 Shares) - Summary Prospectus | 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. | | |
| Muni and Stock Advantage Fund (A, B, C, F, and IS Shares) - Summary Prospectus | 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. | | |
| Intermediate Corporate Bond Fund (IS and SS Shares) - Semi-Annual Shareholder Report | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | | |
| U.S. Treasury Cash Reserves (IS and SS Shares) - Semi-Annual Shareholder Report | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | | |
| Short-Term Income Fund (A, IS, SS, Y, and R6 Shares) - Semi-Annual Shareholder Report | The fund's semi-annual report provides shareholders with information such as recent performance, portfolio information and financial information. | | |
| MDT Large Cap Value Fund (A, B, C, R, IS, SS, and R6 Shares) - Statement of Additional Information (SAI) | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | | |
| Absolute Return Fund (A, B, C, and IS Shares) - Statement of Additional Information (SAI) | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | | |
| Muni and Stock Advantage Fund (A, B, C, F, and IS Shares) - Statement of Additional Information (SAI) | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | | |
| Institutional High Yield Bond Fund (IS and R6 Shares) - Statement of Additional Information (SAI) | The Statement of Additional Information offers detailed information about the fund's policies, operations, management, investments and risks. | | |