XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.21.2

GOVERNMENT GRANTS (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 18 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 16, 2020 USD ($) | Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) item | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) item MW | Dec. 31, 2018 USD ($) | Jun. 30, 2021 USD ($)
Government Grants |  |  |  |  |  |  |  |  |  |
Revenue |  |  | $ 123,865 |  | $ 109,098 | $ 248,375 | $ 220,004 |  |  |
Payment for PALs |  |  |  |  |  |  | 20,000 |  |  |
Universal Service Fund programs |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Number of fund disbursement programs | item |  |  |  |  |  | 4 |  |  |  |
High-Cost Support Program | Grant Reduction During First Year |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Amount of reduction in grant amount awarded | $ 10,900 |  |  |  |  |  |  |  |  |
High-Cost Support Program | US Telecom |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 300 |  | 300 | $ 600 | 600 |  |  |
High-Cost Support Program | International Telecom |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 4,300 |  | 4,100 | 8,400 | 8,200 |  |  |
High-Cost Support Program | International Telecom | Grant Reduction During First Year |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Ratio of reduction in grant amount | 0.67 |  |  |  |  |  |  |  |  |
High-Cost Support Program | International Telecom | Grant Reduction During Second Year |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Ratio of reduction in grant amount | 0.33 |  |  |  |  |  |  |  |  |
Amount of reduction in grant amount awarded | $ 5,500 |  |  |  |  |  |  |  |  |
E-Rate, Lifeline and Rural Health Care Support Programs |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 1,800 |  | 2,200 | 3,900 | 4,400 |  |  |
Network Connectivity for Eligible Communities |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Grant Funds Awarded |  |  |  |  |  | 6,500 |  | $ 16,800 |  |
Offsetting operating activities |  |  |  |  |  | 1,300 |  |  |  |
Construction obligation completed |  | $ 10,200 |  |  |  |  |  |  |  |
Construction obligation yet to be completed |  | $ 13,100 |  |  |  |  |  |  |  |
CARES Act |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Grant Funds Awarded |  |  |  |  |  | 2,400 |  | $ 16,300 |  | $ 18,700
Grant funds used to offset fixed asset related costs |  |  | 18,400 |  |  | 18,400 |  |  |  | 18,400
Grant funds used to offset operating expenses |  |  | 300 |  |  | 300 |  |  |  | $ 300
Tribal Bidding Credit |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Wireless service spectrum (in Mhz) | MW |  |  |  |  |  |  |  | 600 |  |
Revenue |  |  |  |  |  |  |  |  | $ 7,400 |
Grant funds used to offset fixed asset related costs |  |  |  |  |  |  |  | $ 6,100 |  |
Grant funds used to offset operating expenses |  |  |  |  |  |  |  | 1,300 |  |
Offsetting operating activities |  |  | 300 |  |  | 600 |  |  |  |
Amount spent on capital expenditure |  |  |  |  |  | 6,100 |  |  |  |
Connect America Fund Phase II Auction |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Revenue |  |  | $ 1,900 |  | $ 1,900 | $ 3,800 | $ 3,800 |  |  |
Grant Funds Awarded |  |  |  |  |  |  |  |  | $ 79,900 |
Grant fund term |  |  |  |  |  |  |  |  | 10 years |
CBRS Auction |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Initial term of licenses |  |  |  | 10 years |  |  |  |  |  |
Payment for PALs |  |  |  | $ 20,400 |  |  |  |  |  |
RDOF |  |  |  |  |  |  |  |  |  |
Government Grants |  |  |  |  |  |  |  |  |  |
Grant funds expected to be awarded |  |  |  |  |  |  |  | $ 20,100 |  |
Grant fund term |  |  |  |  |  |  |  | 10 years |  |
Number of households to receive broadband coverage | item |  |  |  |  |  |  |  | 10,000 |  |

X
- Definition Amount of reduction in grant amount awarded. + References No definition available. + Details
Name: | atni_AmountOfGrantReduction
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of construction obligation completed. + References No definition available. + Details
Name: | atni_ConstructionObligationCompleted
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of construction obligation yet to be completed. + References No definition available. + Details
Name: | atni_ConstructionObligationToBeCompleted
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the term of grant funds. + References No definition available. + Details
Name: | atni_GrantFundTerm
Namespace Prefix: | atni_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of grant funds awarded. + References No definition available. + Details
Name: | atni_GrantFundsAwarded
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of grant funds expected to be awarded. + References No definition available. + Details
Name: | atni_GrantFundsExpectedToBeAwarded
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of grant funds used for capital expenditure. + References No definition available. + Details
Name: | atni_GrantFundsUsedForCapitalExpenditure
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of grants received for the construction of assets which are recognized as a reduction of the cost of fixed assets, a reduction of depreciation expense over the useful lives of the assets, and as a reduction of capital expenditures. + References No definition available. + Details
Name: | atni_GrantFundsUsedToOffsetFixedAssetRelatedCosts
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of grants received that offset operating costs. + References No definition available. + Details
Name: | atni_GrantFundsUsedToOffsetOperatingExpenses
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of reduction in grant amount. + References No definition available. + Details
Name: | atni_GrantReductionPortionRatio
Namespace Prefix: | atni_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the initial license period subject to meeting substantial performance requirements. + References No definition available. + Details
Name: | atni_LicenseInitialTerm
Namespace Prefix: | atni_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | atni_MobilityFundLineItems
Namespace Prefix: | atni_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of fund disbursement programs to telecommunication providers. + References No definition available. + Details
Name: | atni_NumberOfFundDisbursementPrograms
Namespace Prefix: | atni_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of households to receive broadband coverage. + References No definition available. + Details
Name: | atni_NumberOfHouseholdsToReceiveBroadbandCoverage
Namespace Prefix: | atni_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of offsetting operating activities. + References No definition available. + Details
Name: | atni_OffsettingOperatingActivities
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the wireless service spectrum band. + References No definition available. + Details
Name: | atni_WirelessServiceSpectrumBand
Namespace Prefix: | atni_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_UniversalServiceFundProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_HighCostSupportProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=atni_GrantReductionDuringFirstYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=atni_UsTelecommunicationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=atni_InternationalTelecomMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=atni_GrantReductionDuringSecondYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_ERateProgramAndLifelineAndRuralHealthCareSupportProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_ERateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_CaresActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_TribalBiddingCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_ConnectAmericaFundPhaseIiAuctionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_CitizensBroadbandRadioServiceAuctionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | atni_GovernmentGrantsAxis=atni_RuralDigitalOpportunityFundPhaseIAuctionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |