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Commitments and Contingencies (Narratives) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 31, 2017 USD ($) | May 31, 2019 USD ($) Home claim_filed | Nov. 30, 2018 USD ($)
Loss Contingencies [Line Items] |  |  |
Minimum warranty on electrical and other building systems (in years) |  | 2 years |
Maximum warranty on electrical and other building systems (in years) |  | 5 years |
Warranty for other components of the home (in years) |  | 1 year |
Performance bonds |  | $ 737,500 | $ 689,300
Letters of credit outstanding |  | $ 33,600 | 28,000
Warranty for other components of a home (in years) |  | 1 year |
Cash deposits |  | $ 48,649 | 53,830
Aggregate purchase price of land |  | $ 1,377,183 | 1,371,238
Damages from Product Defects [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Structural warranty provided by the company (in years) |  | 10 years |
Minimum number of affected homes for construction defect claims | Home |  | 2 |
Warranty Obligations [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Structural warranty provided by the company (in years) |  | 10 years |
Self Insurance [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Recoveries related to warranty and other claims |  | $ 49,000 | 56,900
Warranty and other [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Recoveries related to warranty and other claims |  | 4,100 | $ 4,800
Northern California Townhome Community [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Claims for damages | $ 100,000 | $ 142,000 |
Chapter 558 of the Florida Statutes [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Outstanding noticed claims | claim_filed |  | 580 |

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