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Regulatory Requirements - Schedule of Net Capital and Excess Net Capital (Details)
$ in Thousands
Nov. 30, 2023
USD ($)
Jefferies LLC  
Net Capital Requirements [Line Items]  
Net Capital $ 1,088,817
Excess Net Capital 980,587
JFSI - SEC  
Net Capital Requirements [Line Items]  
Net Capital 348,457
Excess Net Capital 328,457
JFSI - CFTC  
Net Capital Requirements [Line Items]  
Net Capital 348,457
Excess Net Capital $ 324,553