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INCOME TAXES (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Valuation Allowance      
Valuation allowance $ 7,734,000us-gaap_DeferredTaxAssetsValuationAllowance $ 4,840,000us-gaap_DeferredTaxAssetsValuationAllowance  
Other income tax disclosures      
Repatriation of foreign earnings 0us-gaap_ForeignEarningsRepatriated 79,000,000us-gaap_ForeignEarningsRepatriated 79,000,000us-gaap_ForeignEarningsRepatriated
Reconciliation of the beginning and ending amount of income tax uncertainties      
Balance at the beginning of period 7,988,000us-gaap_UnrecognizedTaxBenefits 8,464,000us-gaap_UnrecognizedTaxBenefits 9,071,000us-gaap_UnrecognizedTaxBenefits
Increases based on tax positions for the current year 113,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 110,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 245,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Increases based on tax positions of prior years 228,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 381,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 107,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Decreases based on tax positions of prior years (1,073,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (92,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (257,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Settlements (407,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (515,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (21,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Lapse of statute of limitations (441,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (360,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (681,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Balance at the end of period 6,408,000us-gaap_UnrecognizedTaxBenefits 7,988,000us-gaap_UnrecognizedTaxBenefits 8,464,000us-gaap_UnrecognizedTaxBenefits
Undistributed earnings attributable to foreign subsidiaries considered to be permanently reinvested 1,300,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries    
Foreign taxes payable in the event of non-fulfillment of terms of government grants 2,200,000atr_ContingentForeignIncomeTaxPayableOnUncertainTaxPositions    
Amount of income tax uncertainties that, if recognized, would impact the effective tax rate 6,300,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate    
Decrease in liability for uncertain tax positions, high end of range 5,000,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound    
Number of months liability for uncertain tax positions will decrease 12 months    
Unrecognized tax benefits, amount accrued for the payment of interest and penalties 700,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 900,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 1,300,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Unrecognized tax benefits, amount recognized in income tax expense (200,000)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense (400,000)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense (100,000)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Minimum      
Other income tax disclosures      
Estimated amount of additional tax if undistributed earnings are remitted as dividends or lent to a U.S. affiliate 100,000,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Maximum      
Other income tax disclosures      
Estimated amount of additional tax if undistributed earnings are remitted as dividends or lent to a U.S. affiliate 125,000,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		    
Canada      
Other income tax disclosures      
Repatriation of foreign earnings     1,300,000us-gaap_ForeignEarningsRepatriated
/ us-gaap_StatementGeographicalAxis
= country_CA
Deferred tax assets related to non-U.S. jurisdictions      
Valuation Allowance      
Valuation allowance 100,000us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_ValuationAllowanceByDeferredTaxAssetAxis
= atr_DeferredTaxAssetsRelatedToNonUSJurisdictionsMember		    
Deferred tax assets related to tax credit carryforwards, U.S. state      
Valuation Allowance      
Valuation allowance 5,400,000us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_ValuationAllowanceByDeferredTaxAssetAxis
= atr_DeferredTaxAssetsTaxCreditCarryforwardsStateMember		    
Deferred tax assets for specified locations      
Valuation Allowance      
Valuation allowance $ 2,200,000us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_ValuationAllowanceByDeferredTaxAssetAxis
= atr_DeferredTaxAssetsSpecifiedLocationsMember