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Consolidated Statement Of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Accumulated Other Comprehensive Loss
Retained Earnings
Balance, shares at Sep. 30, 2020   61,099,000    
Balance at Sep. 30, 2020 $ 2,232,268 $ 305,453 $ (18,716) $ 1,945,531
Exercise of employee stock options, shares   164,000    
Exercise of employee stock options 4,864 $ 4,864    
Issuance of stock under employee stock purchase plan, shares   542,000    
Issuance of stock under employee stock purchase plan 60,888 $ 60,888    
Issuance of restricted stock, shares   1,430,000    
Repurchase of common stock, shares   (2,501,000)    
Repurchase of common stock (500,000) $ (411,056)   (88,944)
Taxes paid related to net share settlement of equity awards, shares   (82,000)    
Taxes paid related to net share settlement of equity awards (14,032) $ (14,032)    
Stock-based compensation 246,341 $ 246,341    
Net income 331,241     331,241
Other comprehensive income (loss) (1,357)   (1,357)  
Balance, shares at Sep. 30, 2021   60,652,000    
Balance at Sep. 30, 2021 2,360,213 $ 192,458 (20,073) 2,187,828
Exercise of employee stock options, shares   143,000    
Exercise of employee stock options 3,613 $ 3,613    
Issuance of stock under employee stock purchase plan, shares   412,000    
Issuance of stock under employee stock purchase plan 60,927 $ 60,927    
Issuance of restricted stock, shares   1,368,000    
Repurchase of common stock, shares   (2,611,000)    
Repurchase of common stock (500,023) $ (394,141)   (105,882)
Taxes paid related to net share settlement of equity awards, shares   (104,000)    
Taxes paid related to net share settlement of equity awards (21,025) $ (21,025)    
Stock-based compensation 249,216 $ 249,216    
Net income 322,160     322,160
Other comprehensive income (loss) $ (6,103)   (6,103)  
Balance, shares at Sep. 30, 2022 59,860,000 59,860,000    
Balance at Sep. 30, 2022 $ 2,468,978 $ 91,048 (26,176) 2,404,106
Exercise of employee stock options, shares 56,516 56,000    
Exercise of employee stock options $ 1,491 $ 1,491    
Issuance of stock under employee stock purchase plan, shares   501,000    
Issuance of stock under employee stock purchase plan 58,468 $ 58,468    
Issuance of restricted stock, shares   1,335,000    
Repurchase of common stock, shares   (2,454,000)    
Repurchase of common stock (350,049) $ (350,049)    
Taxes paid related to net share settlement of equity awards, shares   (91,000)    
Taxes paid related to net share settlement of equity awards (13,209) $ (13,209)    
Stock-based compensation 236,650 $ 236,650    
Net income 394,948     394,948
Other comprehensive income (loss) $ 2,955   2,955  
Balance, shares at Sep. 30, 2023 59,207,000 59,207,000    
Balance at Sep. 30, 2023 $ 2,800,232 $ 24,399 $ (23,221) $ 2,799,054