Variable Interest Entities (Details) (USD $)	Feb. 28, 2015	Nov. 30, 2014
Variable Interest Entity [Line Items]
Cash Deposits	$ 28,469,000	$ 33,059,000
Aggregate Purchase Price	829,204,000	958,470,000
Pre-acquisition costs related to land option contracts and other similar contracts	50,200,000	48,000,000
Outstanding letters of credit	0	100,000
Increase in inventories and accrued expenses and other liabilities	3,100,000	3,100,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash Deposits	9,439,000	10,633,000
Aggregate Purchase Price	456,479,000	520,628,000
Non-VIE Other land option contracts and other similar contracts [Member]
Variable Interest Entity [Line Items]
Cash Deposits	19,030,000	22,426,000
Aggregate Purchase Price	$ 372,725,000	$ 437,842,000