Expense Example - Tandem Fund - Tandem Fund Shares	Nov. 01, 2026 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 67
Expense Example, with Redemption, 3 Years	276
Expense Example, with Redemption, 5 Years	502
Expense Example, with Redemption, 10 Years	$ 1,151

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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