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Inventory (Major Components Of Inventory) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Homes under construction $ 2,464,808 $ 1,921,259
Land under development 3,997,728 4,072,109
Raw land 627,628 777,287
Total Inventory $ 7,090,164 $ 6,770,655