Revenue Recognition (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 26, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 976,021,000	$ 791,660,000	$ 623,647,000
Document Period End Date	Dec. 31, 2020
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 0
Revenue, Practical Expedient, Remaining Performance Obligation, Description	Our contracts with homebuyers have a duration of less than one year. As such, the Company uses the practical expedient as allowed under ASC 606 and has not disclosed the transaction price allocated to remaining performance obligations as of the end of the reporting period.
Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 930,176,000	759,830,000	578,893,000
Residential Real Estate [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	923,901,000	752,273,000	571,177,000
Residential Real Estate [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	6,275,000	7,557,000	7,716,000
Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	45,845,000	31,830,000	44,754,000
Real Estate, Other [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	45,845,000	31,830,000	44,754,000
Real Estate, Other [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Homebuyers [Member] | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	930,176,000	759,830,000	578,893,000
Homebuyers [Member] | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	185,000	670,000
Homebuilders [Member] | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Homebuilders [Member] | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	45,845,000	31,645,000	44,084,000
Central | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	644,976,000	396,900,000	281,868,000
Central | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	43,788,000	31,080,000	40,184,000
Southeast | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	285,200,000	362,930,000	297,025,000
Southeast | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,057,000	750,000	4,570,000
sic_Z6552 Land Subdividers and Developers (No Cemeteries)
Disaggregation of Revenue [Line Items]
Revenues	43,289,000	31,080,000	39,834,000
sic_Z6552 Land Subdividers and Developers (No Cemeteries) | Residential Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
us-gaap_HomeBuildingMember
Disaggregation of Revenue [Line Items]
Revenues	932,732,000	760,580,000	583,813,000
us-gaap_HomeBuildingMember | Real Estate, Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,600,000	800,000	4,900,000
us-gaap_HomeBuildingMember | Land and Lots [Member]
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
us-gaap_HomeBuildingMember | Central
Disaggregation of Revenue [Line Items]
Revenues	645,475,000	396,900,000	282,218,000
us-gaap_HomeBuildingMember | Southeast
Disaggregation of Revenue [Line Items]
Revenues	$ 287,257,000	$ 363,680,000	$ 301,595,000
GHO Homes [Member]
Disaggregation of Revenue [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contract With Customer, Refund Liability				$ 9,100,000