Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Notes Payable - Additional Information (Detail)

v2.4.1.9
Long-Term Debt and Notes Payable - Additional Information (Detail) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended
Jul. 18, 2013
Dec. 31, 2014
Sep. 26, 2014
Dec. 31, 2013
Debt Instrument [Line Items]        
Interest rate on revolving credit line and term loan at LIBOR rate Interest rate ranging from 225 basis points to 350 basis points above LIBOR, depending on the Company's leverage ratio LIBOR plus between 1.50% and 2.50% based on the Company's leverage ratio    
Term loan   $ 183,008,000us-gaap_LongTermDebt   $ 200,320,000us-gaap_LongTermDebt
Outstanding letter of credit   5 years    
Outstanding letters of credit   1,100,000us-gaap_LettersOfCreditOutstandingAmount    
Covenants permitted leverage ratio   18.7atro_CovenantLeverageRatioPermitted    
Leverage ratio   1.28atro_LeverageRatio    
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Interest rate on revolving credit at LIBOR rate   1.67%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
   
Revolving credit facility   58,000,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
   
Term loan   165,000,000us-gaap_LongTermDebt
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
   
Letter of Credit [Member]        
Debt Instrument [Line Items]        
Credit facility allocated     20,000,000atro_CreditFacilityAllocation
/ us-gaap_CreditFacilityAxis
= us-gaap_LetterOfCreditMember
 
Credit Agreement [Member] | Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Revolving credit facility 75,000,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
125,000,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
   
Term loan 190,000,000us-gaap_LongTermDebt
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
     
Outstanding letter of credit   5 years    
Credit Agreement [Member] | Revolving Credit Facility [Member] | Term Loan [Member]        
Debt Instrument [Line Items]        
Revolving credit facility, maturity date   Jun. 30, 2018    
Amended and Restated Credit Agreement [Member]        
Debt Instrument [Line Items]        
Revolving credit facility     6,000,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
 
Term loan outstanding amount     180,500,000us-gaap_DebtDefaultLongtermDebtAmount
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
 
Replacement of original facility     350,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
 
Line of credit facility increase amount     150,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
 
Maturity date of loans     Sep. 26, 2019  
Debt instrument description   Covenants in the Agreement have been modified to where the maximum permitted leverage ratio of funded debt to Adjusted EBITDA (as defined in the Agreement) is 3.5 to 1, increasing to 4.0 to 1 for up to two fiscal quarters following the closing of an acquisition permitted under the Agreement.    
Covenants permitted leverage ratio   3.5atro_CovenantLeverageRatioPermitted
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
   
Libor rate description   LIBOR plus between 137.5 basis points and 225 basis points based upon the Company's leverage ratio    
Minimum interest coverage ratio   3.0atro_MinimumInterestCoverageRatio
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
   
Minimum [Member]        
Debt Instrument [Line Items]        
Line of credit facility unused capacity 0.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
0.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Minimum [Member] | Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Interest rate on revolving credit at LIBOR rate   1.375%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Minimum [Member] | Credit Agreement [Member]        
Debt Instrument [Line Items]        
Interest rate on revolving credit at LIBOR rate   1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Minimum [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Revolving credit line   35,000,000us-gaap_LineOfCreditFacilityIncreaseDecreaseOtherNet
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Interest rate on revolving credit at LIBOR rate   2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Minimum [Member] | Amended and Restated Credit Agreement [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Commitment Fee   0.175%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Maximum [Member]        
Debt Instrument [Line Items]        
Line of credit facility unused capacity 0.50%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
0.50%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Maximum [Member] | Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Interest rate on revolving credit at LIBOR rate   2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Maximum [Member] | Credit Agreement [Member]        
Debt Instrument [Line Items]        
Interest rate on revolving credit at LIBOR rate   2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Maximum [Member] | Credit Agreement [Member] | Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Revolving credit line   $ 75,000,000us-gaap_LineOfCreditFacilityIncreaseDecreaseOtherNet
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Interest rate on revolving credit at LIBOR rate   3.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= atro_CreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Maximum [Member] | Amended and Restated Credit Agreement [Member]        
Debt Instrument [Line Items]        
Covenants permitted leverage ratio   4.0atro_CovenantLeverageRatioPermitted
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Line of Credit Facility, Commitment Fee   0.35%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_DebtInstrumentAxis
= atro_AmendedAndRestatedCreditAgreementMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember