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Inventory (Tables)
9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of Real Estate Inventory
A summary of inventory is as follows (in thousands):
 
September 30, 2018
 
December 31, 2017
Completed home inventory and residential lots held for sale
$
165,107

 
$
106,043

Work in process and land under development
480,419

 
386,181

Land held for sale
2,715

 
3,830

Total inventory
$
648,241

 
$
496,054

Summary of Real Estate Inventory Capitalized Interest Costs
A summary of interest costs incurred, capitalized and expensed is as follows (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
Interest capitalized at beginning of period
$
12,143

 
$
9,425

 
$
10,474

 
$
9,417

Interest incurred
2,479

 
1,177

 
6,113

 
2,955

Interest charged to cost of sales
(1,114
)
 
(716
)
 
(3,079
)
 
(2,486
)
Interest capitalized at end of period
$
13,508

 
$
9,886

 
$
13,508

 
$
9,886