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Inventory (Major Components Of Inventory) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Homes under construction $ 3,120,585 $ 2,630,158
Land under development 4,229,633 4,129,225
Raw land 452,274 493,970
Total Inventory $ 7,802,492 $ 7,253,353