Property and Equipment, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Nov. 30, 2019
Property, Plant and Equipment [Abstract]
Computer software and equipment	$ 31,901		$ 27,091
Model furnishings and sales office improvements	80,642		82,117
Leasehold improvements, office furniture and equipment	17,167		16,173
Subtotal	129,710		125,381
Less accumulated depreciation	(65,091)		(60,338)
Total	64,619		$ 65,043
Proceeds from sale of building	$ 0	$ 5,804