Income Taxes Net deferred tax asset (liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Other	$ 117,682	$ 117,133
Non-deductible reserves and other	60,585	78,271
Inventory valuation reserves	132,495	202,791
NOL carryforwards:
Federal	27,122	41,282
State	228,959	248,224
Alternative minimum tax credits	2,546	54,965
Energy credit and charitable contribution carryforward	5,146	41,763
Deferred Tax Assets, Gross	574,535	784,429
Deferred Tax Liabilities [Abstract]
Capitalized items, including real estate basis differences, deducted for tax, net	(1,038)	(17,895)
Deferred Tax Liability, deferral of profit on home sales	(188,628)	(34,769)
Trademarks and tradenames	(16,701)	(17,860)
Deferred Tax Liabilities, Gross	(206,367)	(70,524)
Valuation allowance	(92,589)	(68,610)
Net deferred tax asset (liability)	$ 275,579	$ 645,295