Variable Interest Entities (Details) - USD ($)	Aug. 31, 2015	Nov. 30, 2014
Variable Interest Entity [Line Items]
Cash Deposits	$ 42,771,000	$ 33,059,000
Aggregate Purchase Price	941,596,000	958,470,000
Pre-acquisition costs related to land option contracts and other similar contracts	60,000,000	48,000,000
Outstanding letters of credit	0	100,000
Increase in inventories and accrued expenses and other liabilities	89,400,000	3,100,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash Deposits	21,907,000	10,633,000
Aggregate Purchase Price	472,169,000	520,628,000
Non-VIE Other land option contracts and other similar contracts [Member]
Variable Interest Entity [Line Items]
Cash Deposits	20,864,000	22,426,000
Aggregate Purchase Price	$ 469,427,000	$ 437,842,000