Performance Management - First Eagle Core Plus Municipal Fund	Oct. 31, 2025
Prospectus [Line Items]
Bar Chart and Performance Table [Heading]	Investment Results
Performance Narrative [Text Block]	Performance history will be included for the Fund after the Fund has been in operation for one calendar year. Until that time, performance information will be available at www.firsteagle.com/funds/core-plus-municipal-fund or by calling 800.334.2143. As with all mutual funds, past performance is not an indication of future performance (before or after taxes).
Performance Past Does Not Indicate Future [Text]	As with all mutual funds, past performance is not an indication of future performance (before or after taxes).
Performance One Year or Less [Text]	Performance history will be included for the Fund after the Fund has been in operation for one calendar year.
Performance Availability Website Address [Text]	www.firsteagle.com/funds/core-plus-municipal-fund
Performance Availability Phone [Text]	800.334.2143

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2

Name:	oef_BarChartAndPerformanceTableHeading
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph i

+ Details

Name:	oef_PerformanceAvailabilityPhone
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph i

+ Details

Name:	oef_PerformanceAvailabilityWebSiteAddress
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph i

+ Details

Name:	oef_PerformanceNarrativeTextBlock
Namespace Prefix:	oef_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph i

+ Details

Name:	oef_PerformanceOneYearOrLess
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 4
-Subsection b
-Paragraph 2
-Subparagraph i

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 27A
-Subsection d
-Paragraph 2
-Subparagraph iiii
-Clause A

+ Details

Name:	oef_PerformancePastDoesNotIndicateFuture
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a

+ Details

Name:	oef_ProspectusLineItems
Namespace Prefix:	oef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=ck0000906352_S000091111Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: