Income Taxes (Details 1) - USD ($) $ in Thousands	Nov. 30, 2017	Nov. 30, 2016
Deferred tax liabilities
Capitalized expenses	$ 98,147	$ 116,551
State taxes	59,174	65,766
Other	313	286
Total	157,634	182,603
Deferred tax assets:
NOLs from 2006 through 2017	236,273	350,329
Tax credits	208,841	197,766
Inventory impairment and land option contract abandonment charges	139,737	176,555
Employee benefits	100,200	102,321
Warranty, legal and other accruals	60,238	51,448
Capitalized expenses	39,195	36,950
Partnerships and joint ventures	14,784	16,293
Depreciation and amortization	7,333	8,530
Other	8,270	6,196
Total	814,871	946,388
Valuation allowance	(23,600)	(24,800)
Total	791,271	921,588
Deferred Tax Assets, Net	$ 633,637	$ 738,985