Segment Reporting - Reconciliation of Pretax Operating Income From Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Total pretax income	$ 201,882	$ 144,312
Homebuilding:
Segment Reporting Information [Line Items]
Total pretax income	188,499	113,507
Total pretax income	188,499	113,507
Financial Services:
Segment Reporting Information [Line Items]
Total pretax income	13,383	30,805
Total pretax income	13,383	30,805
Operating Segments | Homebuilding: | West
Segment Reporting Information [Line Items]
Total pretax income	130,526	77,187
Operating Segments | Homebuilding: | Mountain
Segment Reporting Information [Line Items]
Total pretax income	50,506	45,858
Operating Segments | Homebuilding: | East
Segment Reporting Information [Line Items]
Total pretax income	31,394	7,835
Operating Segments | Financial Services: | Mortgage operations
Segment Reporting Information [Line Items]
Total pretax income	7,433	26,039
Operating Segments | Financial Services: | Other
Segment Reporting Information [Line Items]
Total pretax income	5,950	4,766
Corporate | Homebuilding:
Segment Reporting Information [Line Items]
Total pretax income	$ (23,927)	$ (17,373)