v3.26.3
Fees and Expenses
Nov. 13, 2026
FAF Trust MM Prospectus Class A Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class A Member | Retail Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class A Member | Retail Tax Free Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class A Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class A Member | U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class D Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class D Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class D Member | U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class P Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class P Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class T Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class T Member | Retail Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class T Member | Retail Tax Free Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class T Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class T Member | U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class T Member | Institutional Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class U Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class V Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class V Member | Retail Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class V Member | Retail Tax Free Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class V Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class V Member | U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class V Member | Institutional Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class X Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class X Member | Retail Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class X Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class X Member | U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Y Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Y Member | Retail Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Y Member | Retail Tax Free Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Y Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Y Member | U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Y Member | Institutional Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Z Member | Government Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Z Member | Retail Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Z Member | Retail Tax Free Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Z Member | Treasury Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Z Member | U.S. Treasury Money Market Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be:
FAF Trust MM Prospectus Class Z Member | Institutional Prime Obligations Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block] The following tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Shareholder Fees Caption [Optional Text] Shareholder Fees(fees paid directly from your investment)
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses(expenses that you pay each year as a percentage of the value of your investment)
Expense Example [Heading] Example:
Expense Example Narrative [Text Block] 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 the fund’s operating expenses remain the same (except that the example incorporates the fund’s expense limitation arrangements for only the first year of each period presented). You would incur these hypothetical expenses whether or not you redeem your investment at the end of the given period.
Expense Example by, Year, Caption [Text] Although your actual costs may be higher or lower, based on these assumptions your costs would be: