XML 55 R45.htm IDEA: XBRL DOCUMENT
v2.4.1.9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014
Understatement of Transactional Tax Liabilities | General and administrative expense |
Prior period corrections |
Correction of immaterial prior period errors in current period | $ 0.7 us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember / us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis = atni_UnderstatementOfTransactionalTaxLiabilitiesMember
Understatement of Foreign Exchange Gains | Other Income |
Prior period corrections |
Correction of immaterial prior period errors in current period | $ 1.1 us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount / us-gaap_IncomeStatementLocationAxis = us-gaap_OtherIncomeMember / us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis = atni_UnderstatementOfForeignExchangeGainsMember

X
- Definition Amount of each individual error being corrected in the correcting adjustment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 1.N.Q3) -URI http://asc.fasb.org/extlink&oid=26874127&loc=d3e30840-122693 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 1 -Section N + Details
Name: | us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis=atni_UnderstatementOfForeignExchangeGainsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis=atni_UnderstatementOfTransactionalTaxLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |