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Commitments and Contingencies (Narratives) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
May 31, 2018 USD ($) | May 31, 2017 USD ($) | May 31, 2018 USD ($) Home | May 31, 2017 USD ($) | Nov. 30, 2017 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 a home (in years) |  |  |  | 1 year |  |
Payments |  | $ (5,330) | $ (6,457) | $ (11,047) | $ (12,569) |
Performance bonds |  | 602,200 |  | 602,200 |  | $ 606,700
Letters of credit outstanding |  | 36,700 |  | 36,700 |  | 37,600
Cash deposits |  | 43,978 |  | 43,978 |  | 64,702
Aggregate purchase price of land |  | 1,165,448 |  | $ 1,165,448 |  | 1,094,087
Warranty for Other Components of Home |  |  |  | 1 year |  |
Northern California Townhome Community [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  |  | $ 100,000 |  |
Damages from Product Defects [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Minimum Number of Affected Homes for Construction Defect Claims | Home |  |  |  | 2 |  |
Structural warranty provided by the company (in years) |  |  |  | 10 years |  |
Warranty Obligations [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Structural warranty provided by the company (in years) |  |  |  | 10 years |  |
Self Insurance [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Increase (Decrease) in Insurance Liabilities | [1] | (7,012) | $ (4,255) | $ (7,048) | $ (5,557) |
Loss Contingency, Receivable |  | $ 64,200 |  | $ 64,200 |  | $ 71,300
[1] | b)The amount for each period reflects changes in our self-insurance liability that were offset by changes in the receivable for estimated probable insurance and other recoveries to present our self-insurance liability on a gross basis.

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