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Inventory And Land Held For Sale (Narrative) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
inactive_community
inacitve_lot
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Inventory Disclosure [Abstract]        
Number of communities | inactive_community 17      
Number of lots | inacitve_lot 4,600      
Net Realizable Value Adjustments Land Held For Sale Total - land held for sale $ (81,000) $ (5,368) $ (11,489) $ (83,576)
Carrying value of land parcels 151,000      
Inventory adjustments NRV       2,600
Inventory [Line Items]        
Land impairments   8,617 $ 70,965 88,952
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 4,500
May 2017 Strategic Review Communities [Member]        
Inventory [Line Items]        
Land impairments $ 31,500      
Large Project Impairment [Member]        
Inventory [Line Items]        
Land impairments       $ 53,000