CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS (Parenthetical) $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($)
Statement of Stockholders' Equity [Abstract]
Repurchased shares, net of early repurchase deduction	$ 8

Stock Repurchased and Retired During Period, Value, Early Release Repurchase Deduction

No definition available.

Name:	aci_StockRepurchasedAndRetiredDuringPeriodValueEarlyReleaseRepurchaseDeduction
Namespace Prefix:	aci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration