Investment in Unconsolidated Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities	$ 5,687	$ 3,891
Investments in unconsolidated entities	58,127		$ 55,616
GB Challenger, LLC
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities	4,067	2,750
Investments in unconsolidated entities	39,532		37,737
Green Brick Mortgage, LLC
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities	328	1,088
Investments in unconsolidated entities	832		715
EJB River Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities	738	(1)
Investments in unconsolidated entities	6,868		6,130
GBTM Sendera, LLC
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities		(17)
Investments in unconsolidated entities	9,854		9,854
BHome Mortgage, LLC
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities	554	71
Investments in unconsolidated entities	1,041		$ 1,180
Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Equity in income of unconsolidated entities	$ 5,687	$ 3,891