COMMITMENTS AND CONTINGENCIES (Details) (Commitment to provide domestic fixed services and international voice and data services, Guyana)	12 Months Ended
Dec. 31, 2012
Commitment to provide domestic fixed services and international voice and data services \| Guyana
Commitments and contingencies
Initial term of license	20 years
Period for optional extension of license term	20 years

Represents the period for which the license term can be extended at the option of the entity.

No definition available.

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Namespace Prefix:	atni_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration