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Accelerated Share Repurchase (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 17, 2021
Equity, Class of Treasury Stock [Line Items] |  |  |
Accelerated Share Repurchases Agreement Amount |  |  | $ 200,000
Payments for Repurchase of Common Stock | $ 541,205 | $ 210,000 |
Accelerated Share Repurchase Agreement Percentage | 80.00% |  |
June17 2021 Agreement |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Payments for Repurchase of Common Stock | $ 200,000 |  |
Stock Repurchased and Retired During Period, Shares | 319,400 |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 40,000 |  |

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