Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 904,319	$ 847,921	$ 2,694,135	$ 2,139,718
Gain (Loss) on Hedging Activity	$ (3,100)	$ (5,700)	$ 800	$ (16,300)
Homebuilding operations percent of total revenue	98.00%	97.00%	97.00%	97.00%
Mortgage Servicing Rights (MSR) Impairment (Recovery)	$ 0	$ 100		$ 500	$ 200
Construction [Member]
Disaggregation of Revenue [Line Items]
Revenues	878,602	812,999	$ 2,604,387	2,067,148
Land [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,922	5,976	10,669	11,109
Financial Service
Disaggregation of Revenue [Line Items]
Revenues	$ 20,795	$ 28,946	$ 79,079	$ 61,461