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Income Taxes - Effective Tax Rates Differ from Statutory Federal Income Tax (Detail)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Income Tax Disclosure [Abstract] | |||
| Statutory Federal Income Tax Rate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate |
| Non-deductible Stock Compensation Expense | 0.60%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost | 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost | 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost |
| Domestic Production Activity Deduction | (2.60%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductions | (3.00%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductions | (3.00%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductions |
| Non-deductible Acquisition Costs | 1.00%atro_EffectiveIncomeTaxRateReconciliationNondeductibleAcquisitionCost | ||
| Other | 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther | 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther | |
| Foreign Tax Benefits | (1.70%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | (1.20%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential |
| State Income Tax (Benefits), Net of Federal Income Tax Effect | 2.60%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes |
| Research and Development Tax Credits | (4.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | (5.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | (1.10%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch |
| Other | (0.70%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | |
| Effective Tax Rate | 29.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 28.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 30.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations |
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- Definition
Effective Income Tax Rate Reconciliation Nondeductible Acquisition Cost No definition available.
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- Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deductions. Including, but not limited to, extraterritorial income exclusion deduction, qualified production activity deduction, dividend deduction, deduction for dividend paid to employee stock ownership plan, Medicare prescription drug benefit subsidy deduction, and other deductions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to equity-based compensation costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other tax credits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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