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Goodwill and Intangibles (Details Textuals) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Goodwill and Intangibles (Textuals) [Abstract]  
Amortization expense for the remainder of 2015 $ 6,200us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
Amortization expense for 2016 24,400us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Amortization expense for 2017 22,900us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Amortization expense for 2018 21,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Amortization expense for 2019 19,100us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Amortization expense for 2020 17,400us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Fluid Power Businesses [Member]  
Goodwill [Line Items]  
Accumulated goodwill impairment losses $ 36,605us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= ait_FluidPowerBusinessesMember