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Employee Benefit Plans (Detail Textuals 1) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
401(k) retirement savings plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Description of the basis for determining contributions | matching contribution equal to 100% of the first 1% of an employee's contribution and make a matching contribution equal to 50% of the next 5% of an employee's contribution. Effective January 1, 2014, for domestic employees hired on or after that date andeffective October 1, 2016, for all domestic employees, such employees receive a non-elective Company contribution of 3% of compensation and are eligible to receive an additional discretionary contribution of up to 4% of compensation, depending on the employee's age and years of service, provided that such payments comply with mandatory non-discrimination testing. |  |
Term of vesting in employer contributions | after two years of service |  |
Defined contribution plan, employer contribution amount | $ 4,154 | $ 2,309 | $ 1,583
Contribution percentage | 3.00% |  |
Maximum additional discretionary contribution percentage | 4.00% |  |
Supplemental executive retirement benefits, international retirement plans and other employee benefit plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expenses under plan | $ 4,304 | 5,239 | $ 3,286
Supplemental executive retirement benefits, international retirement plans and other employee benefit plans | Other liabilities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension and other postretirement benefit plans, liabilities | $ 15,139 | $ 14,898 |

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