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Basis of Presentation Change in Accounting Principle (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | $ 0 us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome | $ 0 us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome | $ 0 us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome | $ 1,167 us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome
Net Sales Impact [Member] [Member] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income |  |  |  | $ 1,200 us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome / us-gaap_AdjustmentsForChangeInAccountingPrincipleAxis = ait_NetSalesImpactMemberMember

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