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Convertible unsecured senior notes - Summary of deferred tax related to equity component of convertible notes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Nov. 30, 2023
Nov. 30, 2022
Nov. 30, 2021
Changes from financing cash flows:      
Cash paid on repurchase $ (27,452) $ (28,746)  
Transaction costs incurred 0 (73)  
Other changes:      
Gain on repurchase 0 (357) $ 0
Conversion 0 (200)  
Liability component      
Convertible unsecured senior notes [Line Items]      
Convertible unsecured senior notes, Beginning balance 26,895 54,227  
Accretion expense 572 1,644  
Changes from financing cash flows:      
Cash paid on repurchase (27,452) (28,546)  
Transaction costs incurred   (73)  
Other changes:      
Gain on repurchase   (357)  
Conversion (15)    
Convertible unsecured senior notes, Ending balance $ 0 $ 26,895 $ 54,227