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Stock Repurchases Tender Offer (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items] |  |  |
Repurchase of common stock (in shares) | 13,877 | 16,477 | 41,020
Value of treasury stock acquired | $ 1,546,016 | $ 1,446,767 | $ 2,402,475
Treasury stock acquired, average cost per share | $ 111.41 | $ 87.80 | $ 58.57
Open Market Purchases |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Repurchase of common stock (in shares) | 13,877 | 8,495 | 19,218
Value of treasury stock acquired | $ 1,546,016 | $ 741,850 | $ 1,168,321
Treasury stock acquired, average cost per share | $ 111.41 | $ 87.32 | $ 60.79
Tender Offer |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Repurchase of common stock (in shares) | 0 | 7,982 | 21,802
Value of treasury stock acquired | $ 0 | $ 704,917 | $ 1,234,154
Treasury stock acquired, average cost per share | $ 0 | $ 88.32 | $ 56.61
Treasury Stock, Shares Repurchases, Table Footnotes: |  |  |
Treasury Stock Acquired, Average Cost Per Share, Clearing Price |  | $ 88.00 | $ 56.50
Share Repurchase Fees And Expenses |  | $ 2,529 | $ 2,343

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