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Nature of Operations and Summary of Significant Accounting Policies Treasury Stock (Details) - USD ($) shares in Thousands, $ in Thousands | 6 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Jun. 30, 2020
Class of Stock Disclosures [Abstract] |  |
Treasury Stock, Common, Shares | 27,668 | 26,993
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | 2,323 | 2,998
Treasury Stock, Value | $ 1,291,572 | $ 1,181,673
Treasury Stock, Shares, Acquired | 675 |

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