Investment in Unconsolidated Entities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	$ 69,250		$ 69,250		$ 55,616
Equity in income of unconsolidated entities	5,697	$ 5,555	19,907	$ 14,039
BHome Mortgage, LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	875		875		1,180
Equity in income of unconsolidated entities	145	435	1,055	839
GB Challenger, LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	46,392		46,392		37,737
Equity in income of unconsolidated entities	5,196	4,377	16,282	10,352
GBTM Sendera, LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	13,451		13,451		9,854
EJB River Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	7,717		7,717		6,130
Equity in income of unconsolidated entities	203	361	1,587	833
Green Brick Mortgage, LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities	815		815		$ 715
Equity in income of unconsolidated entities	153	382	983	2,015
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities	$ 5,697	$ 5,555	$ 19,907	$ 14,039