Nature of Operations and Summary of Significant Accounting Policies Treasury Stock (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2018	Jun. 30, 2018
Class of Stock Disclosures [Abstract]
Treasury Stock, Shares	26,107,903	26,107,903
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	3,883,000	3,883,000
Treasury Stock, Value	$ 1,055,260	$ 1,055,260
Treasury Stock, Shares, Acquired	0

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- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

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