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Land and Development (Schedule of Land and Development) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Total land and development, net $ 681,410   $ 860,311
Capital expenditures on land and development assets 30,954 $ 27,604  
Land & Development      
Property, Plant and Equipment [Line Items]      
Land and land development, at cost 689,249   868,692
Less: accumulated depreciation (7,839)   (8,381)
Total land and development, net $ 681,410   $ 860,311