Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Principles and Practices - Additional Information (Detail)

v2.4.1.9
Summary of Significant Accounting Principles and Practices - Additional Information (Detail) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Reporting_Unit
Segment
Contract
Dec. 31, 2013
Dec. 31, 2012
Dec. 05, 2013
Jan. 14, 2015
Schedule Of Accounting Policies [Line Items]          
Reportable segments 2us-gaap_NumberOfReportableSegments        
Significant contracts with right of return 0atro_NumberOfSignificantContractsAllowingRightOfReturn        
Revenue recognized from long term fixed price contracts $ 2,700,000atro_RevenueRecognizedFromLongTermFixedPriceContracts $ 4,400,000atro_RevenueRecognizedFromLongTermFixedPriceContracts $ 4,200,000atro_RevenueRecognizedFromLongTermFixedPriceContracts    
Research and development, design and related engineering 76,700,000us-gaap_ResearchAndDevelopmentExpense 52,800,000us-gaap_ResearchAndDevelopmentExpense 44,900,000us-gaap_ResearchAndDevelopmentExpense    
Period of options granted 5 years        
Options granted 20.00%atro_ShareBasedCompensationArrangementByShareBasedPaymentAwardAnnualVestingPercentage        
Excess tax benefits from share based payment arrangements 5,262,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 1,198,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 1,252,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities    
Depreciation expense 10,600,000us-gaap_Depreciation 5,700,000us-gaap_Depreciation 4,400,000us-gaap_Depreciation    
Capital leases, future minimum payments due in 2015 1,800,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent        
Capital leases, future minimum payments due in 2016 2,000,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears        
Capital leases, future minimum payments due in 2017 2,200,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears        
Capital leases, future minimum payments due in 2018 2,300,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears        
Capital leases, future minimum payments due in 2019 1,700,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears        
Number of reporting units 10us-gaap_NumberOfReportingUnits        
Number of reporting units have goodwill and subject to goodwill impairment test 7atro_GoodwillImpairmentNumberOfReportingUnitsTestedForImpairment        
Goodwill impairment charge 0us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss    
Cash dividends 0us-gaap_PaymentsOfDividendsCommonStock        
Acquisition expenses 300,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts 1,900,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts      
PGA Electronic S.A. [Member]          
Schedule Of Accounting Policies [Line Items]          
Percentage of acquired stock       100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= atro_PgaElectronicSaMember 		 
Date of acquisition       Dec. 05, 2013  
Business acquisition cash       9,100,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= atro_PgaElectronicSaMember 		 
Subsequent Event [Member]          
Schedule Of Accounting Policies [Line Items]          
Percentage of acquired stock         100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Date of acquisition         Jan. 14, 2015
Business acquisition cash         52,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Buildings [Member] | Minimum [Member]          
Schedule Of Accounting Policies [Line Items]          
Property, plant and equipment, useful life 25 years        
Buildings [Member] | Maximum [Member]          
Schedule Of Accounting Policies [Line Items]          
Property, plant and equipment, useful life 40 years        
Machinery and Equipment [Member] | Minimum [Member]          
Schedule Of Accounting Policies [Line Items]          
Property, plant and equipment, useful life 4 years        
Machinery and Equipment [Member] | Maximum [Member]          
Schedule Of Accounting Policies [Line Items]          
Property, plant and equipment, useful life 10 years        
Building [Member]          
Schedule Of Accounting Policies [Line Items]          
Building acquired under capital leases, gross 16,000,000us-gaap_CapitalLeasedAssetsGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		8,800,000us-gaap_CapitalLeasedAssetsGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		     
Accumulated amortization 3,300,000us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		2,400,000us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		     
Building acquired under capital leases, net $ 12,700,000us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		$ 6,400,000us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember 		     
Convertible Class B Stock [Member]          
Schedule Of Accounting Policies [Line Items]          
Stock distribution One-for-five