Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 847,921	$ 653,345		$ 2,139,718	$ 1,758,140
Gain (Loss) on Hedging Activity	$ (5,700)	$ (4,700)		$ (16,300)	$ (10,700)
Homebuilding operations percent of total revenue	97.00%	98.00%		97.00%	98.00%
Mortgage Servicing Rights (MSR) Impairment (Recovery)	$ 100		$ 400	$ 500		$ 0
Construction [Member]
Disaggregation of Revenue [Line Items]
Revenues	812,999	$ 631,380		2,067,148	$ 1,695,558
Land [Member]
Disaggregation of Revenue [Line Items]
Revenues	5,976	8,511		11,109	23,042
Financial Services Sector [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 28,946	$ 13,454		$ 61,461	$ 39,540