XML 50 R32.htm IDEA: XBRL DOCUMENT
v2.4.1.9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of changes in accumulated other comprehensive income (loss), by component | Changes in accumulated other comprehensive income (loss), by component, were as follows (in thousands):
|  | Interest Rate Derivative Agreements |  | Projected Pension Benefit Obligation |  | Translation Adjustment |  | Total |
Balance at December 31, 2012 |  | $ | (6,985 | ) | $ | (1,318 | ) | $ | 6 |  | $ | (8,297 | )
Adjust funded status of pension plan, net of tax of $0.2 million |  |  | — |  |  | (631 | ) |  | — |  |  | (631 | )
Foreign currency translation adjustment |  |  | — |  |  | — |  |  | (259 | ) |  | (259 | )
Other comprehensive income before reclassifications, net of taxes of $2.3 million |  |  | 3,753 |  |  | — |  |  | — |  |  | 3,753 |
Amounts reclassified from accumulated other comprehensive income, net of taxes of $2.0 million |  |  | 3,232 |  |  | — |  |  | — |  |  | 3,232 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2013 |  |  | — |  |  | (1,949 | ) |  | (253 | ) |  | (2,202 | )
Adjust funded status of pension plan, net of tax of $0.6 million |  |  | — |  |  | (723 | ) |  | — |  |  | (723 | )
Foreign currency translation adjustment |  |  | — |  |  | — |  |  | 4 |  |  | 4 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2014 |  | $ | — |  | $ | (2,672 | ) | $ | (249 | ) | $ | (2,921 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of percentage of revenues generated from a single customer that exceeds 10% of the Company's consolidated revenue |
Customer |  | 2012 |  | 2013 |  | 2014 |
Verizon |  |  | 11 | % |  | 13 | % |  | 16 | %
AT&T |  |  | 20 | % |  | 18 | % |  | 26 | %
Schedule of percentage of accounts receivable, from customers that exceed 10% of the Company's consolidated accounts receivable, net of allowances |
Customer |  | 2013 |  | 2014 |
AT&T |  |  | 29 | % |  | 47 | %
Verizon |  |  | 10 | % |  | 7 | %
Schedule of assets and liabilities of the Company measured at fair value on a recurring basis |
|  | December 31, 2013 |
Description |  | Quoted Prices in Active Markets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Total |
Certificates of deposit |  | $ | — |  | $ | 363 |  | $ | 363 |
Money market funds |  | $ | 2,244 |  | $ | — |  | $ | 2,244 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total assets measured at fair value |  | $ | 2,244 |  | $ | 363 |  | $ | 2,607 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | December 31, 2014 |
Description |  | Quoted Prices in Active Markets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Total |
Certificates of deposit |  | $ | — |  | $ | 363 |  | $ | 363 |
Money market funds |  | $ | 1,493 |  | $ | — |  | $ | 1,493 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total assets measured at fair value |  | $ | 1,493 |  | $ | 363 |  | $ | 1,856 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Debt (Note 8) |  | $ | — |  | $ | 38,877 |  | $ | 38,877 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total liabilities measured at fair value |  | $ | — |  | $ | 38,877 |  | $ | 38,877 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of reconciliation from basic to diluted weighted average common shares outstanding | The reconciliation from basic to diluted weighted average common shares outstanding is as follows (in thousands):
|  | For the Year Ended December 31, |
|  | 2012 |  | 2013 |  | 2014 |
Basic weighted-average common shares outstanding |  |  | 15,531 |  |  | 15,704 |  |  | 15,898 |
Stock options |  |  | 88 |  |  | 113 |  |  | 115 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted weighted-average common shares outstanding |  |  | 15,619 |  |  | 15,817 |  |  | 16,013 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of anti-dilutive potential shares that were excluded from the computation of diluted weighted average shares outstanding | The following notes the number of potential common shares not included in the above calculation because the effects of such were anti-dilutive (in thousands of shares):
|  | For the Year Ended December 31, |
|  | 2012 |  | 2013 |  | 2014 |
Stock options |  |  | 367 |  |  | 61 |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  |  | 367 |  |  | 61 |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

X
- Definition Tabular disclosure of the percentage that a specified receivable or amount at risk from a counterparty under a contractual arrangement is to a specified benchmark, such as total receivables, net revenues, pretax results. Risk is the materially adverse effects of loss attributable to (a) the failure to collect a significant receivable from a major customer or group of homogeneous accounts, or (b) a failure by a counterparty to perform under terms of a contractual arrangement. + References No definition available. + Details
Name: | atni_ScheduleOfConcentrationOfRiskCreditConcentrationRiskTableTextBlock
Namespace Prefix: | atni_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the percentage that revenues in the period from one or more significant customers is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer. + References No definition available. + Details
Name: | atni_ScheduleOfConcentrationOfRiskCustomerConcentrationRiskTableTextBlock
Namespace Prefix: | atni_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration