v3.26.1
Consolidated Statements of Shareholders' Equity Statement - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
AOCI Attributable to Parent
Retained Earnings
Beginning Balance (in shares) at Sep. 30, 2024   58,094    
Beginning Balance at Sep. 30, 2024 $ 3,129,378 $ 5,889 $ (20,912) $ 3,144,401
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Exercise of employee stock options (in shares)   23    
Exercise of employee stock options 830 $ 830    
Issuance of stock under employee stock purchase plan (in shares)   341    
Issuance of stock under employee stock purchase plan 58,188 $ 58,188    
Issuance of restricted stock (in shares)   948    
Issuance of restricted stock 0      
Repurchase of common stock (in shares)   (1,459)    
Repurchase of common stock, including excise taxes (375,595) $ (178,805)   (196,790)
Taxes paid related to net share settlement of equity awards (in shares)   (80)    
Taxes paid related to net share settlement of equity awards (19,601) $ (19,601)    
Stock-based compensation 174,243 $ 174,243    
Net income 501,887     501,887
Other comprehensive income (loss) 2,354   2,354  
Ending Balance ( in shares) at Jun. 30, 2025   57,867    
Ending Balance at Jun. 30, 2025 3,471,684 $ 40,744 (18,558) 3,449,498
Beginning Balance (in shares) at Mar. 31, 2025   57,919    
Beginning Balance at Mar. 31, 2025 3,314,045 $ 40,252 (22,310) 3,296,103
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Exercise of employee stock options (in shares)   4    
Exercise of employee stock options 131 $ 131    
Issuance of stock under employee stock purchase plan (in shares)   178    
Issuance of stock under employee stock purchase plan 35,016 $ 35,016    
Issuance of restricted stock (in shares)   267    
Issuance of restricted stock 0      
Repurchase of common stock (in shares)   (488)    
Repurchase of common stock, including excise taxes (125,105) $ (88,588)   (36,517)
Taxes paid related to net share settlement of equity awards (in shares)   (13)    
Taxes paid related to net share settlement of equity awards (3,518) $ (3,518)    
Stock-based compensation 57,451 $ 57,451    
Net income 189,912     189,912
Other comprehensive income (loss) 3,752   3,752  
Ending Balance ( in shares) at Jun. 30, 2025   57,867    
Ending Balance at Jun. 30, 2025 $ 3,471,684 $ 40,744 (18,558) 3,449,498
Beginning Balance (in shares) at Sep. 30, 2025 57,684 57,684    
Beginning Balance at Sep. 30, 2025 $ 3,591,999 $ 42,023 (18,324) 3,568,300
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Exercise of employee stock options (in shares)   8    
Exercise of employee stock options 244 $ 244    
Issuance of stock under employee stock purchase plan (in shares)   279    
Issuance of stock under employee stock purchase plan 59,352 $ 59,352    
Issuance of restricted stock (in shares)   850    
Issuance of restricted stock 0      
Repurchase of common stock (in shares)   (1,910)    
Repurchase of common stock, including excise taxes (502,032) $ (221,948)   (280,084)
Taxes paid related to net share settlement of equity awards (in shares)   (85)    
Taxes paid related to net share settlement of equity awards (22,664) $ (22,664)    
Stock-based compensation 193,535 $ 193,535    
Net income 536,017     536,017
Other comprehensive income (loss) $ (722)   (722)  
Ending Balance ( in shares) at Jun. 30, 2026 56,826 56,826    
Ending Balance at Jun. 30, 2026 $ 3,855,729 $ 50,542 (19,046) 3,824,233
Beginning Balance (in shares) at Mar. 31, 2026   56,753    
Beginning Balance at Mar. 31, 2026 3,649,575 $ 52,585 (19,035) 3,616,025
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Exercise of employee stock options (in shares)   2    
Exercise of employee stock options 126 $ 126    
Issuance of stock under employee stock purchase plan (in shares)   173    
Issuance of stock under employee stock purchase plan 36,530 $ 36,530    
Issuance of restricted stock (in shares)   247    
Issuance of restricted stock 0      
Repurchase of common stock (in shares)   (334)    
Repurchase of common stock, including excise taxes (99,686) $ (99,686)   0
Taxes paid related to net share settlement of equity awards (in shares)   (14)    
Taxes paid related to net share settlement of equity awards (4,546) $ (4,546)    
Stock-based compensation 65,534 $ 65,534    
Net income 208,208     208,208
Other comprehensive income (loss) $ (11)   (11)  
Ending Balance ( in shares) at Jun. 30, 2026 56,826 56,826    
Ending Balance at Jun. 30, 2026 $ 3,855,729 $ 50,542 $ (19,046) $ 3,824,233