Variable Interest Entities (Details) (USD $)	May 31, 2013	Nov. 30, 2012
Variable Interest Entities [Abstract]
Cash deposits associated with land option and other similar contracts of unconsolidated VIE's	$ 10,323,000	$ 8,463,000
Total cash deposits associated with land option and other similar contracts that were not VIE's	12,012,000	17,219,000
Cash Deposits on Land Option and Other Similar Contracts	22,335,000	25,682,000
Aggregate purchase price of land option and other similar contracts of unconsolidated VIE's	475,665,000	327,196,000
Aggregate purchase price of land option and other similar contracts that were not VIE's	232,097,000	298,139,000
Aggregate Purchase Price Associated with Land Option and Other Similar Contracts	707,762,000	625,335,000
Pre-acquisition costs related to land option contracts and other similar contracts	29,400,000	25,400,000
Outstanding letters of credit	100,000	500,000
Increase in inventories and accrued expenses and other liabilities	$ 8,900,000	$ 4,100,000