XML 19 R28.htm IDEA: XBRL DOCUMENT
v2.4.1.9

LOSS ON DECONSOLIDATION OF SUBSIDIARY (Detail) (USD $) | 3 Months Ended | 1 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2015
Loss on deconsolidation of subsidiary | $ 19,937,000 us-gaap_DeconsolidationGainOrLossAmount |
Island Wireless |  |
Loss on deconsolidation of subsidiary |  | 19,900,000 us-gaap_DeconsolidationGainOrLossAmount / us-gaap_StatementBusinessSegmentsAxis = atni_IslandWirelessMember
Deconsolidation of non-controlling interests |  | 20,000,000 us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation / us-gaap_StatementBusinessSegmentsAxis = atni_IslandWirelessMember
Gain arising from excess of proceeds over the carrying value of net assets |  | $ 100,000 us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount / us-gaap_StatementBusinessSegmentsAxis = atni_IslandWirelessMember

X
- Definition The amount of the gain (loss) recognized by the parent and included in its attributable portion of net income for the period due to deconsolidation of a subsidiary or derecognition of a group of assets. The gain (loss) recognized and included in the net income attributable to the parent for the period is generally computed as the difference between: (a) the aggregate of: (1) the fair value of any consideration received; (2) the fair value of any retained noncontrolling investment in the former subsidiary at the date the subsidiary was deconsolidated; and (3) the carrying amount of any noncontrolling interest in the former subsidiary (including any accumulated other comprehensive income attributable to the noncontrolling interest) at the date the subsidiary was deconsolidated and (b) the carrying amount of the former subsidiary's assets and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4582445-111684 + Details
Name: | us-gaap_DeconsolidationGainOrLossAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition In connection with deconsolidation of a subsidiary or derecognition of a group of assets, the portion of any gain (loss) recognized by the parent, during the period, which is related to the remeasurement of any retained investment in the former subsidiary or group of assets to its fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4582445-111684 + Details
Name: | us-gaap_DeconsolidationRevaluationOfRetainedInvestmentGainOrLossAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of the reduction or elimination during the period of a noncontrolling interest resulting from the parent's loss of control and deconsolidation of the entity in which one or more outside parties had a noncontrolling interest. + References No definition available. + Details
Name: | us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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