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Inventory And Land Held For Sale (Major Components Of Inventory) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]      
Homes under construction $ 2,630,158 $ 2,421,405 $ 1,921,259
Land under development 4,129,225 4,135,814 4,072,109
Raw land 493,970 589,911 777,287
House and land inventory $ 7,253,353 $ 7,147,130 $ 6,770,655