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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 | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2021
Class of Stock Disclosures [Abstract] |  |  |
Treasury Stock, Common, Shares | 31,043 |  | 29,793
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | 3,948 |  | 5,198
Treasury Stock, Value | $ 1,807,119 |  | $ 1,613,202
Treasury Stock, Shares, Acquired | 1,250 | 675 | 2,800

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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. + Details
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