S000000699 [Member] Expense Example - Clearwater Tax-Exempt Bond Fund - Clearwater Tax-Exempt Bond Fund	Dec. 31, 2025 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 73
Expense Example, with Redemption, 3 Years	227
Expense Example, with Redemption, 5 Years	395
Expense Example, with Redemption, 10 Years	$ 883

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