Net Capital Requirements - Schedule of Net Capital and Excess Net Capital (Details) $ in Thousands	Nov. 30, 2021 USD ($)
Jefferies LLC
Net Capital Requirements [Line Items]
Net Capital	$ 2,225,733
Excess Net Capital	2,108,211
JFSI
Net Capital Requirements [Line Items]
Net Capital	452,297
Excess Net Capital	$ 432,297