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Employee Benefit Plans- Other employee benefit plans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Percentage of matching contribution | 100.00% |  |
Percentage of employee's contribution | 6.00% |  |
401(k) retirement savings plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Description of the basis for determining contributions | a matching contribution equal to 100% of the first 6.0% of an employee’s contribution; and, (ii) an additional discretionary contribution of up to 4.5% of compensation, depending on the employee’s age and years of service, provided that such contributions comply with ERISA non-discrimination requirements. Employee and Company contributions are subject to certain ERISA limitations. |  |
Defined contribution plan, employer contribution amount | $ 5,803 | $ 5,566 | $ 5,201
Maximum additional discretionary contribution percentage | 4.50% |  |
Supplemental executive retirement benefits, international retirement plans and other employee benefit plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expenses under plan | $ 5,095 | 5,725 | $ 5,685
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 | $ 13,827 | $ 13,666 |

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