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Inventory (Major Components Of Inventory) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Homes under construction $ 2,892,328 $ 2,630,158
Land under development 4,161,168 4,129,225
Raw land 453,047 493,970
Total Inventory $ 7,506,543 $ 7,253,353