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Inventory (Major Components Of Inventory) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Homes under construction $ 2,149,799 $ 1,921,259
Land under development 4,181,691 4,072,109
Raw land 696,845 777,287
Total Inventory $ 7,028,335 $ 6,770,655