Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements - Schedule of Accumulated Other Comprehensive Loss (Details)

v3.26.1
Fair Value Measurements - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Increase (Decrease) in Shareholders' Equity        
Beginning balance $ 1,719,812 $ 1,646,849 $ 1,674,035 $ 1,842,815
Other comprehensive income before reclassifications     (218)  
Amounts reclassified from accumulated other comprehensive loss     (2,970)  
Other comprehensive (loss)/income (2,029) 1,179 (3,188) 14,085
Ending balance 1,696,961 1,667,474 1,696,961 1,667,474
Foreign currency translation adjustments        
Increase (Decrease) in Shareholders' Equity        
Beginning balance     (20,706)  
Other comprehensive income before reclassifications     (2,531)  
Amounts reclassified from accumulated other comprehensive loss     0  
Other comprehensive (loss)/income     (2,531)  
Ending balance (23,237)   (23,237)  
Net unrealized gain on derivatives, net of tax        
Increase (Decrease) in Shareholders' Equity        
Beginning balance     2,839  
Other comprehensive income before reclassifications     2,313  
Amounts reclassified from accumulated other comprehensive loss     (2,970)  
Other comprehensive (loss)/income     (657)  
Ending balance 2,182   2,182  
Total        
Increase (Decrease) in Shareholders' Equity        
Beginning balance (19,026) (19,554) (17,867) (32,460)
Ending balance $ (21,055) $ (18,375) $ (21,055) $ (18,375)