XML 55 R45.htm IDEA: XBRL DOCUMENT
v2.4.0.8

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $) | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Dec. 31, 2013 | Sep. 20, 2013 Alltel sale AT&T Mobility | Dec. 31, 2013 Alltel sale AT&T Mobility | Sep. 30, 2013 Alltel sale AT&T Mobility
Pending Sale Of U.S. Retail Wireless Business |  |  |  |  |  |
Consideration for sale of operations in all-cash transaction |  |  |  | $ 780,000,000 |  |
Working capital |  |  |  | 16,828,000 |  |
Gain on sale of assets | $ 1,905,000 | $ 305,197,000 | $ 307,102,000 | $ 307,102,000 | $ 1,900,000 | $ 305,200,000

X
- Definition Represents the amount of working capital proceeds related to disposal group, including a discontinued operation. + References No definition available. + Details
Name: | atni_DisposalGroupIncludingDiscontinuedOperationWorkingCapitalProceeds
Namespace Prefix: | atni_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The value of all consideration given or received by the Entity in the significant acquisition or disposal. + References No definition available. + Details
Name: | us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant