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Employee Benefit Plans (Detail Textuals 1) - USD ($)
$ in Thousands
 12 Months Ended
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