Commitments and Contingencies - Narrative (Details)	12 Months Ended
	Nov. 30, 2020 USD ($) claim_filed Home	Nov. 30, 2019 USD ($)	Nov. 30, 2016 USD ($)
Loss Contingencies [Line Items]
Structural warranty provided by company	10 years
Warranty on electrical heating cooling plumbing and other building systems	2 years
Maximum warranty on electrical heating cooling plumbing and other building systems	5 years
Warranty for other components of home	1 year
Reclassification of warranty recoveries to receivables	$ 82,018,000	$ 80,729,000
Estimate of possible loss			$ 25,000,000.0
Performance bonds	897,600,000	793,900,000
Letters of credit outstanding	42,100,000	34,700,000
Cash deposits	54,634,000	75,186,000
Aggregate purchase price	1,418,429,000	1,423,519,000
Minimum
Loss Contingencies [Line Items]
Range of possible loss could exceed amount accrued	0
Maximum
Loss Contingencies [Line Items]
Range of possible loss could exceed amount accrued	3,000,000.0
LOC Facilities
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 29,700,000	15,800,000
Expiration period	1 year
Damages from Product Defects
Loss Contingencies [Line Items]
Minimum number of affected homes for construction defect claims | Home	2
Self Insurance
Loss Contingencies [Line Items]
Reclassification of warranty recoveries to receivables	$ 60,000,000.0	$ 50,600,000
Chapter 558 of the Florida Statutes
Loss Contingencies [Line Items]
Number of new claims filed | claim_filed	600