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Inventory (Capitalization of Interest) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]    
Interest capitalized at beginning of period $ 14,780 $ 10,474
Interest incurred 2,886 1,628
Interest charged to cost of revenues (1,140) (881)
Interest capitalized at end of period $ 16,526 $ 11,221