Segment Reporting - Reconciliation of Revenue From Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Homebuilding:
Segment Reporting Information [Line Items]
Total financial services revenues	$ 1,367,773	$ 886,758	$ 2,409,631	$ 1,583,843
Homebuilding: | West
Segment Reporting Information [Line Items]
Total financial services revenues	847,683	490,117	1,464,294	895,615
Homebuilding: | Mountain
Segment Reporting Information [Line Items]
Total financial services revenues	400,633	316,666	725,350	539,524
Homebuilding: | East
Segment Reporting Information [Line Items]
Total financial services revenues	119,457	79,975	219,987	148,704
Financial Services: | West
Segment Reporting Information [Line Items]
Total financial services revenues	33,318	32,964	78,341	54,850
Financial Services: | Mortgage operations
Segment Reporting Information [Line Items]
Total financial services revenues	23,321	24,363	58,486	38,988
Financial Services: | Other
Segment Reporting Information [Line Items]
Total financial services revenues	$ 9,997	$ 8,601	$ 19,855	$ 15,862