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Income Taxes - Reconciliations of Federal statutory rate to effective tax rate (Details 2) | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Valuation Allowance [Line Items] |  |  |
Federal income tax rate | 28.10% | 35.00% | 35.00%
State and local taxes, net of federal benefit | 1.50% | 0.90% | 0.20%
Foreign income tax rates | (1.50%) | (6.80%) | (5.50%)
Foreign incentive tax rates | (3.30%) | (3.10%) | (4.50%)
Domestic tax on foreign income | 0.00% | 2.70% | 2.70%
Changes in uncertain tax positions | 1.10% | 1.60% | (4.90%)
Permanent items | 0.50% | (0.90%) | 1.50%
Exercise of employee stock options | (4.30%) | (3.80%) | (4.60%)
Mandatory toll charge from Tax Act | 0.50% | 0.00% | 0.00%
Reduction of domestic deferred tax assets | 2.60% | 0.00% | 0.00%
Reduction of foreign deferred tax assets | 1.30% | 0.00% | 0.00%
Recognition of foreign tax credits | (0.70%) | (0.00%) | (0.00%)
Reclassification from accumulated other comprehensive income | 0.60% | 0.00% | 0.00%
Other | (0.10%) | (0.70%) | 0.10%
Effective tax rate | 26.30% | 19.80% | (7.80%)
Foreign |  |  |
Valuation Allowance [Line Items] |  |  |
Release of valuation allowance | 0.00% | (5.10%) | 0.00%
Domestic |  |  |
Valuation Allowance [Line Items] |  |  |
Release of valuation allowance | 0.00% | 0.00% | (27.80%)

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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to unrecognized tax benefits. + References No definition available. + Details
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