Acquisitions - Additional Information (Details) (USD $)
|
3 Months Ended |
6 Months Ended |
0 Months Ended |
Feb. 28, 2015
|
Feb. 28, 2014
|
Feb. 28, 2015
|
Feb. 28, 2014
|
May 23, 2014
|
Business Acquisition [Line Items] |
|
|
|
|
|
Purchase accounting adjustments |
|
|
$ 3,157,000us-gaap_GoodwillPurchaseAccountingAdjustments
|
|
|
Net sales |
301,005,000us-gaap_SalesRevenueNet
|
327,770,000us-gaap_SalesRevenueNet
|
628,770,000us-gaap_SalesRevenueNet
|
667,326,000us-gaap_SalesRevenueNet
|
|
Hayes Industries [Member] |
|
|
|
|
|
Business Acquisition [Line Items] |
|
|
|
|
|
Business Acquisition, Date of Acquisition Agreement |
|
|
|
|
May 23, 2014
|
Cash paid for business acquisitions, net of cash acquired |
|
|
|
|
30,500,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |
4,000,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
|
4,000,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
|
|
Recognition of Goodwill due to Business acquired |
|
|
|
|
14,400,000us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill |
|
|
|
|
10,600,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
Purchase accounting adjustments |
|
|
3,157,000us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
|
|
Net sales |
6,500,000us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
|
14,100,000us-gaap_SalesRevenueNet / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember
|
|
|
Hayes Industries [Member] | Customer relationships |
|
|
|
|
|
Business Acquisition [Line Items] |
|
|
|
|
|
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill |
|
|
|
|
3,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
|
Hayes Industries [Member] | Patents |
|
|
|
|
|
Business Acquisition [Line Items] |
|
|
|
|
|
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill |
|
|
|
|
5,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember
|
Hayes Industries [Member] | Tradenames |
|
|
|
|
|
Business Acquisition [Line Items] |
|
|
|
|
|
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill |
|
|
|
|
2,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember
|
Hayes Industries [Member] | Other intangibles |
|
|
|
|
|
Business Acquisition [Line Items] |
|
|
|
|
|
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill |
|
|
|
|
$ 300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill / us-gaap_BusinessAcquisitionAxis = atu_HayesIndustriesMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = atu_NonCompeteAgreementsAndOtherMember
|