S000000884 [Member] Fees and Expenses - Wasatch International Opportunities Fund	Sep. 30, 2025
Prospectus [Line Items]
Expense Heading [Optional Text]	Fees and Expenses of the Fund
Expense Narrative [Text Block]	The tables below 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.
Expenses Restated to Reflect Current [Text]	Effective January 31, 2026, the management fee was reduced from 1.75% to 1.50%. The management fee and the total annual fund operating expenses have been restated to reflect the 1.50% management fee.
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 invested $10,000 in the applicable class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that operating expenses (as a percentage of net assets) of the Fund remained the same. This example reflects contractual fee waivers and reimbursements through January 31, 2027. 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). Higher portfolio turnover 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 example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 29% of the average value of its portfolio.
Portfolio Turnover, Rate	29.00%

S000000884 [Member] Fees and Expenses - Wasatch International Opportunities Fund

Sep. 30, 2025

Fees and Expenses of the Fund

The tables below 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.

Expenses Restated to Reflect Current [Text]

Effective January 31, 2026, the management fee was reduced from 1.75% to 1.50%. The management fee and the total annual fund operating expenses have been restated to reflect the 1.50% management fee.

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 invested $10,000 in the applicable class of the Fund for the time periods indicated and then redeemed all of your shares at the end of those periods. The example also assumes that your investment had a 5% return each year and that operating expenses (as a percentage of net assets) of the Fund remained the same. This example reflects contractual fee waivers and reimbursements through January 31, 2027. 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). Higher portfolio turnover 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 example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 29% of the average value of its portfolio.

Portfolio Turnover, Rate

29.00%