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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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The cash outflow to reacquire common stock during the period.

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Number of shares that have been repurchased and retired during the period.

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