Investments - Summary of Selected Financial Information for Berkadia (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Nov. 30, 2020
Schedule of Equity Method Investments [Line Items]
Net earnings	$ 493,865	$ 171,365
Berkadia
Schedule of Equity Method Investments [Line Items]
Our total equity balance	330,800		$ 301,200
Distributions	300	36,200
Berkadia | Equity method investment, nonconsolidated investee or group of investees
Schedule of Equity Method Investments [Line Items]
Net earnings	$ 66,700	$ 48,700