Employees' Savings Plan (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Employees' Savings Plan [Abstract]
Percentage of Voluntarily contribution by employees	80.00%
Percentage of Participants voluntary contributions	50.00%
Percentage of Maximum Company contribution	3.00%
Company matching contributions vesting period	4 years
Company expensed for plan	$ 4,515	$ 3,560	$ 2,524

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- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

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- Definition

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

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- Definition

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

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- Definition

For a defined contribution postretirement plan, the period of time over which employer contributions vest.

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- Definition

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

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