Fees and Expenses - GoodHaven Fund	Mar. 30, 2026
Prospectus [Line Items]
Expense Heading [Optional Text]	Fees and Expenses of the Fund
Expense Narrative [Text Block]	The following table describes 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 table and example below.
Expenses Other Expenses Had Extraordinary Expenses Been Included [Text]	Other Expenses includes the Fund’s Support Services Agreement fee of up to 0.20% which was adopted to include the Fund’s customary day-to-day expenses such as custodial, transfer agency, administration, legal and audit fees. The Support Services Agreement fee does not include (a) any charges associated with the execution of portfolio transactions, such as brokerage commissions, acquired fund fees and expenses, or transaction charges, (b) taxes, if any, imposed on the Fund, (c) interest, if any, on any Fund borrowings, or (d) extraordinary Fund legal expenses incurred outside of the normal operation of the Fund, such as legal fees, arbitration fees, or related expenses in connection with any actual or threatened arbitration, mediation, or litigation.
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 that the Fund’s operating expenses remain the same.
Expense Example by, Year, Caption [Text]	Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Portfolio Turnover [Heading]	Portfolio Turnover
Portfolio Turnover [Text Block]	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the above example, affect the Fund’s performance. During the most recent fiscal year ended November 30, 2025, the Fund’s portfolio turnover rate was 9% of the average value of its portfolio.
Portfolio Turnover, Rate	9.00%

Fees and Expenses - GoodHaven Fund

Mar. 30, 2026

Fees and Expenses of the Fund

The following table describes 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 table and example below.

Expenses Other Expenses Had Extraordinary Expenses Been Included [Text]

Other Expenses includes the Fund’s Support Services Agreement fee of up to 0.20% which was adopted to include the Fund’s customary day-to-day expenses such as custodial, transfer agency, administration, legal and audit fees. The Support Services Agreement fee does not include (a) any charges associated with the execution of portfolio transactions, such as brokerage commissions, acquired fund fees and expenses, or transaction charges, (b) taxes, if any, imposed on the Fund, (c) interest, if any, on any Fund borrowings, or (d) extraordinary Fund legal expenses incurred outside of the normal operation of the Fund, such as legal fees, arbitration fees, or related expenses in connection with any actual or threatened arbitration, mediation, or litigation.

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 that the Fund’s operating expenses remain the same.

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

Portfolio Turnover

Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the above example, affect the Fund’s performance. During the most recent fiscal year ended November 30, 2025, the Fund’s portfolio turnover rate was 9% of the average value of its portfolio.

Portfolio Turnover, Rate

9.00%