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CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, unless otherwise specified | Atlantic Tele-Network, Inc. | Common Stock | Treasury Stock, at cost | Additional Paid In Capital | Retained Earnings | Accumulated Other Comprehensive Income/(Loss) | Non-Controlling Interests | Total
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Equity, beginning of period at Dec. 31, 2011 | $ 294,266 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | $ 160 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (4,942)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 118,620 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 190,327 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (9,899)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 58,264 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 352,530 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of 109,318, 100,902 and 72,083 restricted shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Issuance of 43,034, 303,536 and 62,575 shares of common stock upon exercise of stock options for the years ended December 31, 2014, 2013 and 2012, respectively | 1,452 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  | 1,452 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 1,452 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Purchase of 34,293, 163,222 and 9,175 shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively | (344)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | (344)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  | (344)us-gaap_TreasuryStockValueAcquiredCostMethod
Stock-based compensation | 3,543 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  | 3,543 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 3,543 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Dividends declared on common stock | (14,943)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  | (14,943)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | (3,389)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (18,332)us-gaap_DividendsCommonStock
Excess tax benefits from share-based compensation | (362)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  | (362)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | (362)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
Non-controlling interest in equity acquired |  |  |  |  |  |  | (77)us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (77)us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
Investments made by minority shareholders |  |  |  |  |  |  | 1,061 us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 1,061 us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination
Comprehensive income: |  |  |  |  |  |  |  |
Net income (loss) | 48,932 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  | 48,932 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 4,235 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 53,167 us-gaap_ProfitLoss
Other comprehensive income, net of tax expense (benefit) of $641, $2,316, and $1,315 for the years ended December 31, 2014, 2013 and 2012, respectively | 1,602 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  | 1,602 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | 1,602 us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income | 50,534 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  |  | 4,235 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 54,769 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Equity, end of period at Dec. 31, 2012 | 334,146 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 160 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (5,286)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 123,253 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 224,316 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (8,297)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 60,094 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 394,240 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of 109,318, 100,902 and 72,083 restricted shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Issuance of 43,034, 303,536 and 62,575 shares of common stock upon exercise of stock options for the years ended December 31, 2014, 2013 and 2012, respectively | 9,302 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 4 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 9,298 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 9,302 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Purchase of 34,293, 163,222 and 9,175 shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively | (8,103)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | (8,103)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  | (8,103)us-gaap_TreasuryStockValueAcquiredCostMethod
Stock-based compensation | 4,454 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  | 4,454 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 4,454 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Dividends declared on common stock | (16,381)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  | (16,381)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | (27,832)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (44,213)us-gaap_DividendsCommonStock
Excess tax benefits from share-based compensation | 2,101 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  | 2,101 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 2,101 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
Investments made by minority shareholders |  |  |  |  |  |  | 407 us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 407 us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination
Sale of non-controlling interest |  |  |  |  |  |  | (13,633)us-gaap_MinorityInterestDecreaseFromRedemptions / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (13,633)us-gaap_MinorityInterestDecreaseFromRedemptions
Comprehensive income: |  |  |  |  |  |  |  |
Net income (loss) | 311,716 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  | 311,716 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 37,489 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 349,205 us-gaap_ProfitLoss
Other comprehensive income, net of tax expense (benefit) of $641, $2,316, and $1,315 for the years ended December 31, 2014, 2013 and 2012, respectively | 6,095 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  | 6,095 us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | 6,095 us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income | 317,811 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  |  | 37,489 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 355,300 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Equity, end of period at Dec. 31, 2013 | 643,330 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 164 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (13,389)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | 139,106 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 519,651 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (2,202)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 56,525 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 699,855 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of 109,318, 100,902 and 72,083 restricted shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively |  |  |  |  |  |  |  | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Issuance of 43,034, 303,536 and 62,575 shares of common stock upon exercise of stock options for the years ended December 31, 2014, 2013 and 2012, respectively | 1,623 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 2 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  | 1,621 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 1,623 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Purchase of 34,293, 163,222 and 9,175 shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively | (2,160)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | (2,160)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |  | (2,160)us-gaap_TreasuryStockValueAcquiredCostMethod
Stock-based compensation | 4,324 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  | 4,324 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 4,324 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Dividends declared on common stock | (17,840)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  | (17,840)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | (16,331)us-gaap_DividendsCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (34,171)us-gaap_DividendsCommonStock
Excess tax benefits from share-based compensation | 513 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  | 513 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  | 513 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
Investments made by minority shareholders |  |  |  |  |  |  | 9,796 us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 9,796 us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination
Comprehensive income: |  |  |  |  |  |  |  |
Net income (loss) | 48,152 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  | 48,152 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | 10,970 us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 59,122 us-gaap_ProfitLoss
Other comprehensive income, net of tax expense (benefit) of $641, $2,316, and $1,315 for the years ended December 31, 2014, 2013 and 2012, respectively | (720)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  | (720)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |  | (720)us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive income | 47,432 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  |  |  |  |  | 10,970 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 58,402 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Equity, end of period at Dec. 31, 2014 | $ 677,222 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | $ 166 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ (15,549)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 145,563 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 549,963 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (2,921)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 60,960 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 738,182 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

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