XML 76 R65.htm IDEA: XBRL DOCUMENT
v3.22.2.2

COMMITMENTS AND CONTINGENCIES (Details) $ in Millions |  | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 05, 2020 item | May 31, 2015 USD ($) | Sep. 30, 2022 USD ($) | Dec. 31, 2011 USD ($)
Contingency related to spectrum fees |  |  |  |
Commitments and contingencies |  |  |  |
Spectrum fees paid |  |  |  | $ 2.6
Litigation proceedings and disputes in Guyana |  |  |  |
Commitments and contingencies |  |  |  |
Number of competitors issued service licenses | item | 2 |  |  |
Legal claims regarding tax filings with the Guyana Revenue Authority | Minimum |  |  |  |
Commitments and contingencies |  |  |  |
Percentage of return on investment ensured by the government of Guyana |  |  | 15.00% |
Breach of contract allegations by TTEC |  |  |  |
Commitments and contingencies |  |  |  |
Amount awarded |  | $ 2.8 |  |
Pending litigation, adverse outcome |  |  |  |
Commitments and contingencies |  |  |  |
Accrued contingent liability |  |  | $ 11.7 |

X
- Definition Represents the return on investment ensured by the government of Guyana, in which if the entity's return on investment falls below the ensured percentage, the Government of Guyana is obligated to reimburse any necessary amount. + References No definition available. + Details
Name: | atni_LossContingencyMinimumReturnOnInvestmentEnsuredByGovernmentOfGuyana
Namespace Prefix: | atni_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of spectrum fees paid as full settlement. + References No definition available. + Details
Name: | atni_LossContingencySpectrumFeesPaid
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of competitors that were issued service licenses. + References No definition available. + Details
Name: | atni_NumberOfCompetitorsIssuedServiceLicenses
Namespace Prefix: | atni_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=atni_ContingencyRelatedToSpectrumFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=atni_LitigationProceedingsAndDisputesInGuyanaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=atni_LegalClaimsRegardingTaxFilingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=atni_BreachOfContractAllegationsByTrinidadTobagoElectricCommissionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |