Segment and Geographic Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	$ 46,807us-gaap_OperatingIncomeLoss	$ 39,837us-gaap_OperatingIncomeLoss	$ 92,972us-gaap_OperatingIncomeLoss	$ 79,376us-gaap_OperatingIncomeLoss
Adjustment for:
Intangible amortization			13,059us-gaap_AmortizationOfIntangibleAssets	6,330us-gaap_AmortizationOfIntangibleAssets
Corporate and other (income) expense, net	(6,571)ait_CorporateAndOtherIncomeNet	(6,985)ait_CorporateAndOtherIncomeNet	(8,759)ait_CorporateAndOtherIncomeNet	(11,944)ait_CorporateAndOtherIncomeNet
Interest (Income) Expense, net	1,955us-gaap_InterestIncomeExpenseNet	(152)us-gaap_InterestIncomeExpenseNet	3,617us-gaap_InterestIncomeExpenseNet	(91)us-gaap_InterestIncomeExpenseNet
Other (Income) Expense, net	380us-gaap_OtherNonoperatingIncomeExpense	(270)us-gaap_OtherNonoperatingIncomeExpense	624us-gaap_OtherNonoperatingIncomeExpense	(1,361)us-gaap_OtherNonoperatingIncomeExpense
Income before income taxes	44,472	40,259	88,731	80,828
Operating Segments [Member]
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	46,804	35,933	97,272	73,762
Service Center Based Distribution [Member]
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	34,580	25,569	72,115	53,941
Adjustment for:
Intangible amortization	5,018	1,887	9,885	3,382
Fluid Power Businesses [Member]
Reconciliation of operating income for reportable segments to the consolidated income before income taxes
Total operating income	12,224	10,364	25,157	19,821
Adjustment for:
Intangible amortization	$ 1,550	$ 1,194	$ 3,174	$ 2,948

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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