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Inventory And Land Held For Sale (Information Related To Interest Capitalized Into Homebuilding Inventory) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]      
Interest in inventory, beginning of period $ 186,097 $ 149,498 $ 167,638
Interest capitalized 181,719 160,506 120,001
Interest expensed (141,205) (123,907) (138,141)
Interest in inventory, end of period $ 226,611 $ 186,097 $ 149,498