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Goodwill and Intangibles Goodwill and Intangibles (Details 2) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]  
Acquisition Cost Allocation $ 77,596us-gaap_FinitelivedIntangibleAssetsAcquired1
Weighted-Average Life 18 years
Customer Relationships [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Acquisition Cost Allocation 68,250us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
Weighted-Average Life 19 years 6 months
Trade Names [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Acquisition Cost Allocation 7,678us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Weighted-Average Life 6 years
Vendor Relationships [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Acquisition Cost Allocation 9us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= ait_VendorRelationshipsMember
Weighted-Average Life 5 years
Noncompete Agreements [Member]  
Acquired Finite-Lived Intangible Assets [Line Items]  
Acquisition Cost Allocation $ 1,659us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Weighted-Average Life 5 years