Income Taxes (Details 1) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Deferred tax liabilities
Capitalized expenses	$ 116,551	$ 110,408
State taxes	65,766	68,866
Other	286	196
Total	182,603	179,470
Deferred tax assets:
NOLs from 2006 through 2016	350,329	423,274
Tax credits	197,766	186,169
Inventory impairments and land option contract abandonments	176,555	179,828
Employee benefits	102,321	93,395
Warranty, legal and other accruals	51,448	49,655
Capitalized expenses	36,950	34,887
Partnerships and joint ventures	16,293	18,557
Depreciation and amortization	8,530	9,146
Other	6,196	4,537
Total	946,388	999,448
Valuation allowance	(24,800)	(37,782)	$ (41,200)
Total	921,588	961,666
Deferred Tax Assets, Net	$ 738,985	$ 782,196