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Inventory (Tables) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Inventory, Real Estate [Abstract]        
Inventory with potential indicators of impairment $ 2,800      
Inventory [Line Items]        
Impairment of Tangible Assets, Other Descriptors   $ 100 $ 100  
Inventory Disclosure [Text Block] INVENTORY
A summary of inventory is as follows (in thousands):
December 31, 2020December 31, 2019
Homes completed or under construction$356,706 $314,966 
Land and lots - developed and under development482,371 437,553 
Land held for sale5,558 1,048 
Total inventory$844,635 $753,567 

A summary of interest costs incurred, capitalized and expensed is as follows (in thousands):
Years Ended December 31,
202020192018
Interest capitalized at beginning of period$18,596 $14,780 $10,474 
Interest incurred9,823 12,140 9,003 
Interest charged to cost of revenues(10,899)(8,324)(4,697)
Interest capitalized at end of period$17,520 $18,596 $14,780 

As of December 31, 2020, the Company reviewed the performance and outlook for all of its communities for indicators of potential impairment and performed detailed impairment analysis when necessary. As of December 31, 2020, the Company performed further impairment analysis of the selling communities with indicators of impairment with a combined corresponding carrying value of approximately $2.8 million.

For the years ended December 31, 2020, 2019 and 2018, the Company recorded a de minimis impairment adjustment, $0.1 million, and $0.1 million, respectively, to reduce the carrying value of impaired communities to fair value. The recorded impairment adjustments related to real estate inventory in our builder operations segments and were included in cost of residential units in our consolidated statements of income.
      
Finished Homes and Homes under Construction $ 356,706 314,966    
Inventory, Real Estate, Land and Land Development Costs 482,371 437,553    
Inventory, Land Held-for-sale 5,558 1,048    
Inventory, Real Estate $ 844,635 753,567    
Schedule of Inventory, Current [Table Text Block]
A summary of inventory is as follows (in thousands):
December 31, 2020December 31, 2019
Homes completed or under construction$356,706 $314,966 
Land and lots - developed and under development482,371 437,553 
Land held for sale5,558 1,048 
Total inventory$844,635 $753,567 
      
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
A summary of interest costs incurred, capitalized and expensed is as follows (in thousands):
Years Ended December 31,
202020192018
Interest capitalized at beginning of period$18,596 $14,780 $10,474 
Interest incurred9,823 12,140 9,003 
Interest charged to cost of revenues(10,899)(8,324)(4,697)
Interest capitalized at end of period$17,520 $18,596 $14,780 
      
Real Estate Inventory, Capitalized Interest Costs $ 17,520 18,596 14,780 $ 10,474
Real Estate Inventory, Capitalized Interest Costs Incurred 9,823 12,140 9,003  
Real Estate Inventory, Capitalized Interest Costs, Cost of Sales $ 10,899 $ 8,324 $ 4,697