Inventory And Land Held For Sale (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Net Realizable Value Adjustments Land Held For Sale Total - land held for sale	$ (871)	$ (5,368)	$ (11,489)
Inventory [Line Items]
Land impairments	$ 7,044	8,617	$ 70,965
Impaired Community
Inventory [Line Items]
Entitlement period sought			10 years
Land impairments		$ 8,600	$ 59,200
All Other Communities
Inventory [Line Items]
Land impairments			$ 11,800