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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, 2019   60,367,000    
Balance at Sep. 30, 2019 $ 1,761,497 $ 142,597 $ (19,190) $ 1,638,090
Exercise of employee stock options 2,596 $ 2,596    
Exercise of employee stock options, shares   104,000    
Issuance of stock under employee stock purchase plan 50,239 $ 50,239    
Issuance of stock under employee stock purchase plan, shares   419,000    
Issuance of restricted stock, shares   1,027,000    
Repurchase of common stock (100,016) $ (100,016)    
Repurchase of common stock, shares   (799,000)    
Taxes paid related to net share settlement of equity awards (2,536) $ (2,536)    
Taxes paid related to net share settlement of equity awards, shares   (19,000)    
Stock-based compensation 212,573 $ 212,573    
Net income 307,441     307,441
Other comprehensive income (loss) 474   474  
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 4,864 $ 4,864    
Exercise of employee stock options, shares   164,000    
Issuance of stock under employee stock purchase plan 60,888 $ 60,888    
Issuance of stock under employee stock purchase plan, shares   542,000    
Issuance of restricted stock, shares   1,430,000    
Repurchase of common stock (500,000) $ (411,056)   (88,944)
Repurchase of common stock, shares   (2,501,000)    
Taxes paid related to net share settlement of equity awards (14,032) $ (14,032)    
Taxes paid related to net share settlement of equity awards, shares   (82,000)    
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 60,652,000    
Balance at Sep. 30, 2021 $ 2,360,213 $ 192,458 (20,073) 2,187,828
Exercise of employee stock options $ 3,613 $ 3,613    
Exercise of employee stock options, shares 143,128 143,000    
Issuance of stock under employee stock purchase plan $ 60,927 $ 60,927    
Issuance of stock under employee stock purchase plan, shares   412,000    
Issuance of restricted stock, shares   1,368,000    
Repurchase of common stock (500,023) $ (394,141)   (105,882)
Repurchase of common stock, shares   (2,611,000)    
Taxes paid related to net share settlement of equity awards (21,025) $ (21,025)    
Taxes paid related to net share settlement of equity awards, shares   (104,000)    
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