Financial Services - Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2020	Aug. 31, 2020	May 31, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Financial services:
Total									$ 4,183,174	$ 4,552,747	$ 4,547,002
Expenses
Equity in income of unconsolidated joint ventures									33,628	10,681	9,367
Pretax income (loss)	$ 126,091	$ 101,315	$ 67,789	$ 68,848	$ 164,967	$ 91,936	$ 56,761	$ 34,511	364,043	348,175	367,965
Financial services:
Financial services:
Insurance commissions									8,589	8,662	7,535
Title services									6,883	6,421	5,672
Interest income									0	6	0
Total									15,472	15,089	13,207
General and administrative									4,083	4,333	3,844
Expenses
Operating income									11,389	10,756	9,363
Equity in income of unconsolidated joint ventures									21,154	12,230	7,301
Pretax income (loss)									$ 32,543	$ 22,986	$ 16,664