Commitments and Contingencies Commitments and Contingencies (Details)	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Number of repair facilities with labor union collective bargaining agreements	2

Number of Repair Facilities With Labor Union Collective Bargaining Agreements

No definition available.

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Namespace Prefix:	arii_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant