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DERIVATIVE FINANCIAL INSTRUMENTS (Details) (Interest Rate Swaps, USD $) In Thousands, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Oct. 31, 2013 derivative | Dec. 31, 2014
Derivative financial instruments |  |  |  |
Number of derivative instruments |  |  | 2 us-gaap_DerivativeNumberOfInstrumentsHeld |
Notional amount of interest rate swap derivatives |  |  | $ 25,000 invest_DerivativeNotionalAmount |
Ratio of notional amount to term loan (as a percent) |  |  | 50.00%amot_DerivativeNotionalAmountRatioOnTermLoan |
Notional amount of interest rate swap derivatives at maturity |  |  | 6,673 amot_DerivativeNotionalAmountAtMaturity |
Amount hedged | 21,000 us-gaap_DerivativeAmountOfHedgedItem |  |  |
Hedge ineffectiveness recorded in earnings | 0 us-gaap_GainOnCashFlowHedgeIneffectiveness | 0 us-gaap_GainOnCashFlowHedgeIneffectiveness |  |
Estimated amount to be reclassified as an increase to interest expense | 155 us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred |  |  |
Effect of derivative financial instruments on the consolidated statement of income and comprehensive income |  |  |  |
Net deferral in OCI of derivatives (effective portion) | (151)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet | (68)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet |  |
Interest expense |  |  |  |
Effect of derivative financial instruments on the consolidated statement of income and comprehensive income |  |  |  |
Net reclassification from AOCI into income (effective portion) | (51)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember | (58)us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember / us-gaap_IncomeStatementLocationAxis = us-gaap_InterestExpenseMember |  |
Accrued liabilities. |  |  |  |
Derivative financial instruments |  |  |  |
Interest rate swaps | (102)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |  |  | (2)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_AccruedLiabilitiesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember
Total Liabilities |  |  |  |
Derivative financial instruments |  |  |  |
Interest rate swaps | $ (102)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |  |  | $ (2)us-gaap_InterestRateDerivativeLiabilitiesAtFairValue / us-gaap_BalanceSheetLocationAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember

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- Details
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- Definition Represent the aggregate notional amount specified by the derivative(s) at maturity, expressed as an absolute value. + References No definition available. + Details
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- Definition Represents the information pertaining to the notional amount of derivatives expressed as a percent on term loan. + References No definition available. + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument. + References No definition available. + Details
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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References No definition available. + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 + Details
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- Definition The gain recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 + Details
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