Segment and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	$ 43,772us-gaap_OperatingIncomeLoss	$ 40,173us-gaap_OperatingIncomeLoss	$ 136,744us-gaap_OperatingIncomeLoss	$ 119,549us-gaap_OperatingIncomeLoss
Adjustment for:
Intangible amortization			19,412us-gaap_AmortizationOfIntangibleAssets	9,518us-gaap_AmortizationOfIntangibleAssets
Corporate and other (income) expense, net	(4,586)ait_CorporateAndOtherIncomeNet	(1,165)ait_CorporateAndOtherIncomeNet	(13,345)ait_CorporateAndOtherIncomeNet	(13,109)ait_CorporateAndOtherIncomeNet
Interest (Income) Expense, net	2,121us-gaap_InterestIncomeExpenseNet	(11)us-gaap_InterestIncomeExpenseNet	5,738us-gaap_InterestIncomeExpenseNet	(102)us-gaap_InterestIncomeExpenseNet
Other (Income) Expense, net	(887)us-gaap_OtherNonoperatingIncomeExpense	(388)us-gaap_OtherNonoperatingIncomeExpense	(263)us-gaap_OtherNonoperatingIncomeExpense	(1,749)us-gaap_OtherNonoperatingIncomeExpense
Income before income taxes	42,538	40,572	131,269	121,400
Operating Segments [Member]
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	45,539	42,196	142,811	115,958
Service Center Based Distribution [Member]
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	33,788	28,754	105,903	82,695
Adjustment for:
Intangible amortization	4,811	1,102	14,696	4,484
Fluid Power Businesses [Member]
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	11,751	13,442	36,908	33,263
Adjustment for:
Intangible amortization	$ 1,542	$ 2,086	$ 4,716	$ 5,034

Corporate and other income, net.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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The net amount of operating interest income (expense).

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The net result for the period of deducting operating expenses from operating revenues.

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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