Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidating Statements of Earnings and Comprehensive Income (Details)

v2.4.1.9
Condensed Consolidating Statements of Earnings and Comprehensive Income (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Feb. 28, 2015
Feb. 28, 2014
Condensed Financial Statements, Captions [Line Items]        
Net sales $ 301,005us-gaap_SalesRevenueNet $ 327,770us-gaap_SalesRevenueNet $ 628,770us-gaap_SalesRevenueNet $ 667,326us-gaap_SalesRevenueNet
Cost of products sold 191,244us-gaap_CostOfGoodsSold 203,323us-gaap_CostOfGoodsSold 392,033us-gaap_CostOfGoodsSold 411,099us-gaap_CostOfGoodsSold
Gross profit 109,761us-gaap_GrossProfit 124,447us-gaap_GrossProfit 236,737us-gaap_GrossProfit 256,227us-gaap_GrossProfit
Selling, administrative and engineering expenses 75,768atu_SellingAdministrativeAndEngineeringExpenses 79,240atu_SellingAdministrativeAndEngineeringExpenses 158,240atu_SellingAdministrativeAndEngineeringExpenses 161,158atu_SellingAdministrativeAndEngineeringExpenses
Amortization of intangible assets 6,087us-gaap_AmortizationOfIntangibleAssets 6,226us-gaap_AmortizationOfIntangibleAssets 12,373us-gaap_AmortizationOfIntangibleAssets 12,441us-gaap_AmortizationOfIntangibleAssets
Impairment charge 84,353us-gaap_AssetImpairmentCharges 0us-gaap_AssetImpairmentCharges 84,353us-gaap_AssetImpairmentCharges 0us-gaap_AssetImpairmentCharges
Operating profit (loss) (56,447)us-gaap_OperatingIncomeLoss 38,981us-gaap_OperatingIncomeLoss (18,229)us-gaap_OperatingIncomeLoss 82,628us-gaap_OperatingIncomeLoss
Financing costs, net 7,030us-gaap_FinancingInterestExpense 6,262us-gaap_FinancingInterestExpense 13,221us-gaap_FinancingInterestExpense 13,012us-gaap_FinancingInterestExpense
Intercompany expense (income), net 0atu_IntercompanyExpenseIncomeNet 0atu_IntercompanyExpenseIncomeNet 0atu_IntercompanyExpenseIncomeNet 0atu_IntercompanyExpenseIncomeNet
Intercompany dividend income 0atu_IntercompanyDividend   0atu_IntercompanyDividend  
Other income, net (619)us-gaap_OtherNonoperatingIncomeExpense 1,326us-gaap_OtherNonoperatingIncomeExpense (1,058)us-gaap_OtherNonoperatingIncomeExpense 2,467us-gaap_OtherNonoperatingIncomeExpense
Earnings (loss) from continuing operations before income tax expense (62,858)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 31,393us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments (30,392)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 67,149us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax expense 1,980us-gaap_IncomeTaxExpenseBenefit 9,089us-gaap_IncomeTaxExpenseBenefit 9,772us-gaap_IncomeTaxExpenseBenefit 11,840us-gaap_IncomeTaxExpenseBenefit
Net earnings (loss) before equity in earnings (loss) of subsidiaries (64,838)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries 22,304atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries (40,164)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries 55,309atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
Equity in earnings (loss) of subsidiaries 0atu_EquityInEarningsOfSubsidiaries 0atu_EquityInEarningsOfSubsidiaries 0atu_EquityInEarningsOfSubsidiaries 0atu_EquityInEarningsOfSubsidiaries
Earnings (loss) from continuing operations (64,838)us-gaap_IncomeLossFromContinuingOperations 22,304us-gaap_IncomeLossFromContinuingOperations (40,164)us-gaap_IncomeLossFromContinuingOperations 55,309us-gaap_IncomeLossFromContinuingOperations
Earnings from discontinued operations, net of income taxes 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 19,088us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 22,120us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net earnings (loss) (64,838)us-gaap_NetIncomeLoss 41,392us-gaap_NetIncomeLoss (40,164)us-gaap_NetIncomeLoss 77,429us-gaap_NetIncomeLoss
Comprehensive (loss) income (121,586)us-gaap_ComprehensiveIncomeNetOfTax 45,789us-gaap_ComprehensiveIncomeNetOfTax (159,875)us-gaap_ComprehensiveIncomeNetOfTax 98,829us-gaap_ComprehensiveIncomeNetOfTax
Parent        
Condensed Financial Statements, Captions [Line Items]        
Net sales 39,335us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
43,595us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
79,601us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
88,686us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cost of products sold 12,076us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
11,992us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
22,043us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
24,064us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Gross profit 27,259us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
31,603us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
57,558us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
64,622us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Selling, administrative and engineering expenses 16,430atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
19,399atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
35,502atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
36,257atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Amortization of intangible assets 318us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
318us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
636us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
636us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Impairment charge 0us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
  0us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Operating profit (loss) 10,511us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
11,886us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
21,420us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
27,729us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Financing costs, net 7,267us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
6,499us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
13,814us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
13,278us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Intercompany expense (income), net (5,098)atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(12,153)atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(10,830)atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(17,150)atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Intercompany dividend income (212)atu_IntercompanyDividend
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
  (212)atu_IntercompanyDividend
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Other income, net (246)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
669us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
219us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
11,086us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Earnings (loss) from continuing operations before income tax expense 8,800us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
16,871us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
18,429us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
20,515us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Income tax expense 1,514us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
4,885us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
3,824us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
5,893us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net earnings (loss) before equity in earnings (loss) of subsidiaries 7,286atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
11,986atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
14,605atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
14,622atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Equity in earnings (loss) of subsidiaries (72,124)atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
50,097atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(54,769)atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
84,319atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Earnings (loss) from continuing operations   62,083us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
  98,941us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Earnings from discontinued operations, net of income taxes   (20,691)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
  (21,512)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Net earnings (loss) (64,838)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
41,392us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(40,164)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
77,429us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Comprehensive (loss) income (121,586)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
45,789us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(159,875)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
98,829us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Guarantors        
Condensed Financial Statements, Captions [Line Items]        
Net sales 70,675us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
75,203us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
148,266us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
154,839us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Cost of products sold 52,182us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
52,009us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
105,440us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
107,264us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Gross profit 18,493us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
23,194us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
42,826us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
47,575us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Selling, administrative and engineering expenses 16,367atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
13,753atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
33,834atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
29,705atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Amortization of intangible assets 2,785us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
2,576us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
5,570us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
5,151us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Impairment charge 20,249us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
  20,249us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
 
Operating profit (loss) (20,908)us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
6,865us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(16,827)us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
12,719us-gaap_OperatingIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Financing costs, net 0us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
0us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
3us-gaap_FinancingInterestExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Intercompany expense (income), net 849atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
5,334atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
2,083atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
4,995atu_IntercompanyExpenseIncomeNet
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Intercompany dividend income (243)atu_IntercompanyDividend
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
  (243)atu_IntercompanyDividend
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
 
Other income, net (64)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(125)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(160)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(418)us-gaap_OtherNonoperatingIncomeExpense
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Earnings (loss) from continuing operations before income tax expense (21,450)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
1,656us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(18,507)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
8,139us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Income tax expense (207)us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
479us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
499us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
2,274us-gaap_IncomeTaxExpenseBenefit
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net earnings (loss) before equity in earnings (loss) of subsidiaries (21,243)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
1,177atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(19,006)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
5,865atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Equity in earnings (loss) of subsidiaries (28,577)atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(23,996)atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(14,430)atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(10,663)atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Earnings (loss) from continuing operations   (22,819)us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
  (4,798)us-gaap_IncomeLossFromContinuingOperations
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Earnings from discontinued operations, net of income taxes   53,156us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
  56,494us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Net earnings (loss) (49,820)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
30,337us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(33,436)us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
51,696us-gaap_NetIncomeLoss
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Comprehensive (loss) income (65,247)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
34,943us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
(71,847)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
73,740us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
Non-Guarantors        
Condensed Financial Statements, Captions [Line Items]        
Net sales 190,995us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
208,972us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
400,903us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
423,801us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Cost of products sold 126,986us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
139,322us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
264,550us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
279,771us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Gross profit 64,009us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
69,650us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
136,353us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
144,030us-gaap_GrossProfit
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Selling, administrative and engineering expenses 42,971atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
46,088atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
88,904atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
95,196atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Amortization of intangible assets 2,984us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
3,332us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
6,167us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
6,654us-gaap_AmortizationOfIntangibleAssets
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
Impairment charge 64,104us-gaap_AssetImpairmentCharges
/ dei_LegalEntityAxis
= us-gaap_NonGuarantorSubsidiariesMember
  64,104us-gaap_AssetImpairmentCharges
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20,230us-gaap_OperatingIncomeLoss
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(22,822)us-gaap_OperatingIncomeLoss
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42,180us-gaap_OperatingIncomeLoss
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Financing costs, net (237)us-gaap_FinancingInterestExpense
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(237)us-gaap_FinancingInterestExpense
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(593)us-gaap_FinancingInterestExpense
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(269)us-gaap_FinancingInterestExpense
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Intercompany expense (income), net 4,249atu_IntercompanyExpenseIncomeNet
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6,819atu_IntercompanyExpenseIncomeNet
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8,747atu_IntercompanyExpenseIncomeNet
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12,155atu_IntercompanyExpenseIncomeNet
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Intercompany dividend income (31)atu_IntercompanyDividend
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  (31)atu_IntercompanyDividend
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Other income, net (309)us-gaap_OtherNonoperatingIncomeExpense
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= us-gaap_NonGuarantorSubsidiariesMember
782us-gaap_OtherNonoperatingIncomeExpense
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(1,117)us-gaap_OtherNonoperatingIncomeExpense
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(8,201)us-gaap_OtherNonoperatingIncomeExpense
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12,866us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
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(29,828)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
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38,495us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
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3,725us-gaap_IncomeTaxExpenseBenefit
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5,533us-gaap_IncomeTaxExpenseBenefit
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3,673us-gaap_IncomeTaxExpenseBenefit
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Net earnings (loss) before equity in earnings (loss) of subsidiaries (50,479)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
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9,141atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
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(35,361)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
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34,822atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
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867atu_EquityInEarningsOfSubsidiaries
/ dei_LegalEntityAxis
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517atu_EquityInEarningsOfSubsidiaries
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4,067atu_EquityInEarningsOfSubsidiaries
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Earnings (loss) from continuing operations   10,008us-gaap_IncomeLossFromContinuingOperations
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  38,889us-gaap_IncomeLossFromContinuingOperations
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Earnings from discontinued operations, net of income taxes   (13,377)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
/ dei_LegalEntityAxis
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  (12,862)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
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Net earnings (loss) (50,156)us-gaap_NetIncomeLoss
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(3,369)us-gaap_NetIncomeLoss
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(34,844)us-gaap_NetIncomeLoss
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26,027us-gaap_NetIncomeLoss
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Comprehensive (loss) income (65,507)us-gaap_ComprehensiveIncomeNetOfTax
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(5,804)us-gaap_ComprehensiveIncomeNetOfTax
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(88,657)us-gaap_ComprehensiveIncomeNetOfTax
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21,867us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
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Eliminations        
Condensed Financial Statements, Captions [Line Items]        
Net sales 0us-gaap_SalesRevenueNet
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0us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
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0us-gaap_SalesRevenueNet
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0us-gaap_SalesRevenueNet
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Cost of products sold 0us-gaap_CostOfGoodsSold
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0us-gaap_CostOfGoodsSold
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0us-gaap_CostOfGoodsSold
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0us-gaap_CostOfGoodsSold
/ dei_LegalEntityAxis
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Gross profit 0us-gaap_GrossProfit
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0us-gaap_GrossProfit
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0us-gaap_GrossProfit
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0us-gaap_GrossProfit
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Selling, administrative and engineering expenses 0atu_SellingAdministrativeAndEngineeringExpenses
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0atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
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0atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
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0atu_SellingAdministrativeAndEngineeringExpenses
/ dei_LegalEntityAxis
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Amortization of intangible assets 0us-gaap_AmortizationOfIntangibleAssets
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0us-gaap_AmortizationOfIntangibleAssets
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0us-gaap_AmortizationOfIntangibleAssets
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0us-gaap_AmortizationOfIntangibleAssets
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Impairment charge 0us-gaap_AssetImpairmentCharges
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  0us-gaap_AssetImpairmentCharges
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Operating profit (loss) 0us-gaap_OperatingIncomeLoss
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0us-gaap_OperatingIncomeLoss
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0us-gaap_OperatingIncomeLoss
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0us-gaap_OperatingIncomeLoss
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Financing costs, net 0us-gaap_FinancingInterestExpense
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0us-gaap_FinancingInterestExpense
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0us-gaap_FinancingInterestExpense
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0us-gaap_FinancingInterestExpense
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Intercompany expense (income), net 0atu_IntercompanyExpenseIncomeNet
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0atu_IntercompanyExpenseIncomeNet
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0atu_IntercompanyExpenseIncomeNet
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0atu_IntercompanyExpenseIncomeNet
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Intercompany dividend income 486atu_IntercompanyDividend
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  486atu_IntercompanyDividend
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Other income, net 0us-gaap_OtherNonoperatingIncomeExpense
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0us-gaap_OtherNonoperatingIncomeExpense
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0us-gaap_OtherNonoperatingIncomeExpense
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0us-gaap_OtherNonoperatingIncomeExpense
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Earnings (loss) from continuing operations before income tax expense (486)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
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0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ dei_LegalEntityAxis
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(486)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
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0us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
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Income tax expense (84)us-gaap_IncomeTaxExpenseBenefit
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0us-gaap_IncomeTaxExpenseBenefit
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(84)us-gaap_IncomeTaxExpenseBenefit
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0us-gaap_IncomeTaxExpenseBenefit
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Net earnings (loss) before equity in earnings (loss) of subsidiaries (402)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
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0atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
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(402)atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
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0atu_NetEarningsLossFromContinuingOperationsBeforeEquityInEarningsOfSubsidiaries
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Equity in earnings (loss) of subsidiaries 100,378atu_EquityInEarningsOfSubsidiaries
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(26,968)atu_EquityInEarningsOfSubsidiaries
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68,682atu_EquityInEarningsOfSubsidiaries
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(77,723)atu_EquityInEarningsOfSubsidiaries
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= us-gaap_ConsolidationEliminationsMember
Earnings (loss) from continuing operations   (26,968)us-gaap_IncomeLossFromContinuingOperations
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  (77,723)us-gaap_IncomeLossFromContinuingOperations
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Earnings from discontinued operations, net of income taxes   0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
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  0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
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(26,968)us-gaap_NetIncomeLoss
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68,280us-gaap_NetIncomeLoss
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(77,723)us-gaap_NetIncomeLoss
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Comprehensive (loss) income $ 130,754us-gaap_ComprehensiveIncomeNetOfTax
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$ (29,139)us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
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$ 160,504us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
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$ (95,607)us-gaap_ComprehensiveIncomeNetOfTax
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