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v3.25.3

Statutory Accounting and Regulation (Details) | 24 Months Ended
--- | ---
Sep. 30, 2025
Statutory Net Income [Line Items] |
Percentage of written premiums | 1.00%

X
- Definition Percentage of written premiums. + References No definition available. + Details
Name: | acic_PercentageOfWrittenPremiums
Namespace Prefix: | acic_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Statutory Net Income [Line Items] + References No definition available. + Details
Name: | acic_StatutoryNetIncomeLineItems
Namespace Prefix: | acic_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration