v3.26.1
Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Treasury Stock
Common stock shares, beginning balance (in shares) at Sep. 30, 2024   59,031,953        
Beginning balance at Sep. 30, 2024 $ 1,767,847 $ 590 $ 505,958 $ (13,464) $ 1,475,719 $ (200,956)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Shares issued under restricted stock and purchase plans, net of shares withheld for employee taxes (in shares)   214,757        
Shares issued under restricted stock and purchase plans, net of shares withheld for employee taxes 1,553 $ 3 1,550      
Stock-based compensation 16,716   16,716      
Net income (loss) (106,640)       (106,640)  
Net investment hedge currency translation adjustment, net of tax (39,744)     (39,744)    
Foreign currency translation adjustments 33,176     33,176    
Changes in unrealized losses on marketable securities, net of tax 262     262    
Actuarial loss on pension plans, net of tax (151)     (151)    
Ending balance at Jun. 30, 2025 1,673,019 $ 593 524,224 (19,921) 1,369,079 (200,956)
Common stock shares, ending balance (in shares) at Jun. 30, 2025   59,246,710        
Common stock shares, beginning balance (in shares) at Mar. 31, 2025   59,237,887        
Beginning balance at Mar. 31, 2025 1,695,452 $ 593 520,961 (42,212) 1,417,066 (200,956)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Shares issued under restricted stock and purchase plans, net of shares withheld for employee taxes (in shares)   8,823        
Stock-based compensation 3,263   3,263      
Net income (loss) (47,987)       (47,987)  
Net investment hedge currency translation adjustment, net of tax (34,656)     (34,656)    
Foreign currency translation adjustments 57,098     57,098    
Changes in unrealized losses on marketable securities, net of tax (101)     (101)    
Actuarial loss on pension plans, net of tax (50)     (50)    
Ending balance at Jun. 30, 2025 $ 1,673,019 $ 593 524,224 (19,921) 1,369,079 (200,956)
Common stock shares, ending balance (in shares) at Jun. 30, 2025   59,246,710        
Common stock shares, beginning balance (in shares) at Sep. 30, 2025 59,320,848 59,320,848        
Beginning balance at Sep. 30, 2025 $ 1,726,986 $ 594 529,605 (22,213) 1,419,956 (200,956)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Shares issued under restricted stock and purchase plans, net of shares withheld for employee taxes (in shares)   249,770        
Shares issued under restricted stock and purchase plans, net of shares withheld for employee taxes (1,343) $ 2 (1,345)      
Share repurchases (in shares)   (2,344,002)        
Share repurchases (50,445) $ (24)       (50,421)
Retirement of treasury shares 0   (50,421)     50,421
Stock-based compensation 15,232   15,232      
Net income (loss) (173,774)       (173,774)  
Net investment hedge currency translation adjustment, net of tax 4,985     4,985    
Foreign currency translation adjustments (9,869)     (9,869)    
Changes in unrealized losses on marketable securities, net of tax (1,486)     (1,486)    
Actuarial loss on pension plans, net of tax (157)     (157)    
Ending balance at Jun. 30, 2026 $ 1,510,129 $ 572 493,071 (28,740) 1,246,182 (200,956)
Common stock shares, ending balance (in shares) at Jun. 30, 2026 57,226,616 57,226,616        
Common stock shares, beginning balance (in shares) at Mar. 31, 2026   59,553,293        
Beginning balance at Mar. 31, 2026 $ 1,554,677 $ 596 538,782 (27,471) 1,243,726 (200,956)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Shares issued under restricted stock and purchase plans, net of shares withheld for employee taxes (in shares)   17,325        
Shares issued under restricted stock and purchase plans, net of shares withheld for employee taxes (102)   (102)      
Share repurchases (in shares)   (2,344,002)        
Share repurchases (50,445) $ (24)       (50,421)
Retirement of treasury shares 0   (50,421)     50,421
Stock-based compensation 4,812   4,812      
Net income (loss) 2,456       2,456  
Net investment hedge currency translation adjustment, net of tax 1,180     1,180    
Foreign currency translation adjustments (1,734)     (1,734)    
Changes in unrealized losses on marketable securities, net of tax (663)     (663)    
Actuarial loss on pension plans, net of tax (52)     (52)    
Ending balance at Jun. 30, 2026 $ 1,510,129 $ 572 $ 493,071 $ (28,740) $ 1,246,182 $ (200,956)
Common stock shares, ending balance (in shares) at Jun. 30, 2026 57,226,616 57,226,616