Variable Interest Entities - Non-consolidated VIEs - Additional Information (Details) - USD ($) $ in Thousands	Nov. 30, 2020	Nov. 30, 2019
Variable Interest Entity [Line Items]
Total assets	$ 47,751,997	$ 43,516,115
Related party private equity vehicles | JCP Entities
Variable Interest Entity [Line Items]
Equity commitments amount	133,000
Funded equity commitments	122,000	121,700
Carrying amount of equity investment	19,000	23,000
Other investment vehicles
Variable Interest Entity [Line Items]
Equity commitments amount	749,300	398,600
Funded equity commitments	748,100	390,800
Carrying amount of equity investment	739,700	404,100
Variable interest entity, primary beneficiary | Agency mortgage-backed securities
Variable Interest Entity [Line Items]
Total assets	1,571,600	1,453,500
Variable interest entity, primary beneficiary | Non-agency mortgage and other asset-backed securities
Variable Interest Entity [Line Items]
Total assets	$ 252,000	$ 134,800