Employees' Savings Plan (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Percentage of voluntarily contribution by employees (percent)	80.00%
Percentage of participants voluntary contributions (percent)	50.00%
Percentage of maximum company contribution (percent)	3.00%
Requisite service period	4 years
Company expensed for plan	$ 8,619	$ 8,178	$ 7,158
Defined Benefit Plan, Benefit Obligation	4,252	3,338
Defined Benefit Plan, Assets for Plan Benefits	9,596	11,602
Pension Expense	2,043	$ 1,921	$ 1,417
Defined Benefit Plan, Curtailments	$ 456

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Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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This represents the entire assets recognized in the balance sheet that are associated with the defined benefit plans.

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- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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- Definition

The amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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-Glossary Plan Curtailment

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The amount of the cost recognized during the period for defined contribution plans.

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The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period.

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For a defined contribution postretirement plan, the percentage of eligible compensation which the entity will contribute for employees.

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For a defined contribution postretirement plan, the percentage of eligible compensation matched by the employer.

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For a defined contribution postretirement plan, the maximum percentage of eligible compensation which the employee may contribute to the plan.

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