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COMMITMENTS AND CONTINGENCIES (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 sqft | Dec. 31, 2013 | Dec. 31, 2012
COMMITMENTS AND CONTINGENCIES |  |  |
Area of lease (in square feet) | 2,300,000 atni_OperatingLeaseArea |  |
Obligation for payments under leases |  |  |
2015 | $ 13,810,000 us-gaap_ContractualObligationDueInNextTwelveMonths |  |
2016 | 13,047,000 us-gaap_ContractualObligationDueInSecondYear |  |
2017 | 8,983,000 us-gaap_ContractualObligationDueInThirdYear |  |
2018 | 6,372,000 us-gaap_ContractualObligationDueInFourthYear |  |
2019 | 2,372,000 us-gaap_ContractualObligationDueInFifthYear |  |
Thereafter | 5,319,000 atni_ContractualObligationDueAfterFourthYear |  |
Total obligations under operating leases | 49,903,000 us-gaap_ContractualObligation |  |
Rent expense |  |  |
Rent expense | $ 15,000,000 us-gaap_OperatingLeasesRentExpenseNet | $ 12,700,000 us-gaap_OperatingLeasesRentExpenseNet | $ 13,700,000 us-gaap_OperatingLeasesRentExpenseNet

X
- Definition Amount of contractual obligation maturing after the fourth fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of contractual obligation maturing in the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of contractual obligation maturing in the fourth fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of contractual obligation maturing in the next fiscal year following the latest fiscal year. + References No definition available. + Details
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- Definition Amount of contractual obligation maturing in the second fiscal year following the latest fiscal year. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
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- Definition Amount of contractual obligation maturing in the third fiscal year following the latest fiscal year. + References No definition available. + Details
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- Details
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- Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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