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v3.25.4

Commitments and Contingencies - Self-Insurance (Details) | Dec. 31, 2025 USD ($)
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Commitments and Contingencies |
Per occurrences for losses | $ 500,000

X
- Definition Amount retained per occurrence of loss pursuant to self insurance. + References No definition available. + Details
Name: | fix_SelfInsuranceAmountRetainedPerOccurrenceOfLoss
Namespace Prefix: | fix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration