Investments - Epic Gas - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Schedule of Equity Method Investments [Line Items]
Net earnings	$ 874,706	$ 244,385	$ 159,017
Epic Gas
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of Epic Gas		24,600
Gain on sale of Epic Gas		2,800
Epic Gas | Equity method investment, nonconsolidated investee or group of investees
Schedule of Equity Method Investments [Line Items]
Net earnings		$ 900	$ 20,100