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Summary of Significant Accounting Policies - Warranties (Details)	12 Months Ended
	Dec. 31, 2025
Minimum
Product Warranty Liability [Line Items]
Product warranty period against materials and manufacturing defects	1 year
Maximum
Product Warranty Liability [Line Items]
Product warranty period against materials and manufacturing defects	5 years

X

- Definition

Product warranty period.

+ References

No definition available.

+ Details

Name:	aca_ProductWarrantyPeriod
Namespace Prefix:	aca_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ProductWarrantyLiabilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: