Variable Interest Entities (Details) - USD ($)	May. 31, 2015	Nov. 30, 2014
Variable Interest Entity [Line Items]
Cash Deposits	$ 31,278,000	$ 33,059,000
Aggregate Purchase Price	907,325,000	958,470,000
Pre-acquisition costs related to land option contracts and other similar contracts	52,100,000	48,000,000
Outstanding letters of credit	0	100,000
Increase in inventories and accrued expenses and other liabilities	48,800,000	3,100,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Cash Deposits	11,564,000	10,633,000
Aggregate Purchase Price	537,300,000	520,628,000
Non-VIE Other land option contracts and other similar contracts [Member]
Variable Interest Entity [Line Items]
Cash Deposits	19,714,000	22,426,000
Aggregate Purchase Price	$ 370,025,000	$ 437,842,000