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Consolidated Statements of Stockholder's Equity - USD ($)
$ in Thousands
Total
Previously Reported
Cash Flow Hedging
Net Investment Hedging
Common Stock
Additional Paid-in Capital
Retained Earnings (Accumulated Deficit)
Retained Earnings (Accumulated Deficit)
Previously Reported
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss
Cash Flow Hedging
Accumulated Other Comprehensive Loss
Net Investment Hedging
Beginning balance at Sep. 30, 2018 $ 874,589       $ 1,180 $ 1,558,403 $ (599,409)   $ (85,585)    
Beginning balance (Accounting Standards Update 2016-16) at Sep. 30, 2018   $ 72,261           $ 72,261      
Beginning balance (Accounting Standards Update 2014-09) at Sep. 30, 2018   363,218           363,218      
Beginning balance (in shares) at Sep. 30, 2018         117,981,000            
Common stock issued for employee stock-based awards         $ 15 (15)          
Common stock issued for employee stock-based awards (in shares)         1,495,000            
Shares surrendered by employees to pay taxes related to stock-based awards (44,366)       $ (5) (44,361)          
Shares surrendered by employees to pay taxes related to stock-based awards (in shares)         (504,000)            
Common stock issued (140)         (140)          
Common stock issued for employee stock purchase plan 17,615       $ 3 17,612          
Common stock issued for employee stock purchase plan (in shares)         275,000            
Compensation expense from stock-based awards 86,400         86,400          
Net income (loss) (27,460)           (27,460)        
Repurchases of common stock $ (114,994)       $ (44) (114,950)          
Repurchases of common stock (in shares) (1,400,000)       (4,348,000)            
Unrealized gain (loss) on hedging instruments, net of tax     $ (385) $ 5,087           $ (385) $ 5,087
Foreign currency translation adjustment $ (24,755)               (24,755)    
Unrealized gain (loss) on available-for-sale securities, net of tax 530               530    
Change in pension benefits, net of tax (5,602)               (5,602)    
Ending balance at Sep. 30, 2019 1,201,998       $ 1,149 1,502,949 (191,390)   (110,710)    
Ending balance (Accounting Standards Update 2016-02) at Sep. 30, 2019   $ (1,572)           $ (1,572)      
Ending balance (in shares) at Sep. 30, 2019         114,899,000            
Common stock issued for employee stock-based awards         $ 14 (14)          
Common stock issued for employee stock-based awards (in shares)         1,392,000            
Shares surrendered by employees to pay taxes related to stock-based awards (33,740)       $ (4) (33,736)          
Shares surrendered by employees to pay taxes related to stock-based awards (in shares)         (455,000)            
Common stock issued for employee stock purchase plan 18,382       $ 2 18,380          
Common stock issued for employee stock purchase plan (in shares)         289,000            
Compensation expense from stock-based awards 115,149         115,149          
Net income (loss) $ 130,695           130,695        
Repurchases of common stock (in shares) 0                    
Unrealized gain (loss) on hedging instruments, net of tax       (13,242)             (13,242)
Foreign currency translation adjustment $ 22,076               22,076    
Unrealized gain (loss) on available-for-sale securities, net of tax 188               188    
Change in pension benefits, net of tax (1,686)               (1,686)    
Ending balance at Sep. 30, 2020 $ 1,438,248       $ 1,161 1,602,728 (62,267)   (103,374)    
Ending balance (in shares) at Sep. 30, 2020 116,125,000       116,125,000            
Common stock issued for employee stock-based awards         $ 15 (15)          
Common stock issued for employee stock-based awards (in shares)         1,490,000            
Shares surrendered by employees to pay taxes related to stock-based awards $ (53,077)       $ (4) (53,073)          
Shares surrendered by employees to pay taxes related to stock-based awards (in shares)         (466,000)            
Common stock issued for employee stock purchase plan 21,575       $ 2 21,573          
Common stock issued for employee stock purchase plan (in shares)         240,000            
Compensation expense from stock-based awards 177,289         177,289          
Net income (loss) 476,923           476,923        
Repurchases of common stock $ (30,000)       $ (2) (29,998)          
Repurchases of common stock (in shares) (200,000)       (226,000)            
Unrealized gain (loss) on hedging instruments, net of tax       $ 1,248             $ 1,248
Foreign currency translation adjustment $ 1,613               1,613    
Unrealized gain (loss) on available-for-sale securities, net of tax (307)               (307)    
Change in pension benefits, net of tax 4,956               4,956    
Ending balance at Sep. 30, 2021 $ 2,038,468       $ 1,172 $ 1,718,504 $ 414,656   $ (95,864)    
Ending balance (in shares) at Sep. 30, 2021 117,163,000       117,163,000