COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
Jan. 02, 2014	May 01, 2014 Subsequent event
Commitments and contingencies
Renewal fee of telecommunications license	$ 4
Amount of overdue spectrum fees demanded by the government of Aruba be paid by May 1, 2014		$ 1

Represents the amount of overdue spectrum fees demanded by the government of Aruba be paid by a specified date.

No definition available.

Name:	atni_LossContingencyOverdueSpectrumFeesDemandedWithinSpecificDate
Namespace Prefix:	atni_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration