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Inventory (Capitalization of Interest) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]        
Interest capitalized at beginning of period $ 18,960 $ 18,791 $ 17,520 $ 18,596
Interest incurred 3,597 2,010 9,698 7,677
Interest charged to cost of revenues (2,797) (2,999) (7,458) (8,471)
Interest capitalized at end of period $ 19,760 $ 17,802 $ 19,760 $ 17,802
Document Period End Date     Sep. 30, 2021  
Capitalized interest as a percentage of inventory 1.70% 2.30%