Segment Reporting - Total Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total Assets	$ 3,505,935	$ 3,338,356
Homebuilding:
Segment Reporting Information [Line Items]
Total Assets	3,244,375	3,031,409
Financial Services:
Segment Reporting Information [Line Items]
Total Assets	261,560	306,947
Operating Segments | Homebuilding: | West
Segment Reporting Information [Line Items]
Total Assets	1,575,620	1,461,645
Operating Segments | Homebuilding: | Mountain
Segment Reporting Information [Line Items]
Total Assets	893,282	869,665
Operating Segments | Homebuilding: | East
Segment Reporting Information [Line Items]
Total Assets	220,235	194,592
Operating Segments | Financial Services: | Mortgage operations
Segment Reporting Information [Line Items]
Total Assets	194,213	209,946
Operating Segments | Financial Services: | Other
Segment Reporting Information [Line Items]
Total Assets	67,347	97,001
Corporate | Homebuilding:
Segment Reporting Information [Line Items]
Total Assets	$ 555,238	$ 505,507