Investment in Unconsolidated Entities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Aug. 15, 2017
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 74,224,000	$ 55,616,000
Revenues	1,757,793,000	1,402,876,000	$ 976,021,000
Net income	313,997,000	204,381,000	117,797,000
Cash	76,588,000	77,166,000	19,479,000	$ 33,269,000
Assets	1,655,675,000	1,421,867,000
Liabilities	543,621,000	511,306,000
Stockholders' Equity Attributable to Parent	1,061,907,000	874,548,000
Stockholders' Equity Attributable to Noncontrolling Interest	20,908,000	14,146,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,082,815,000	888,694,000	649,409,000	$ 536,395,000
Liabilities and Equity	1,655,675,000	1,421,867,000
Income (Loss) from Equity Method Investments	25,626,000	19,713,000	16,654,000
Guarantor Obligations, Maximum Exposure, Undiscounted	2,000,000
Contributions of LLC Members			500,000
Contributions from noncontrolling interests	0	0	400,000
Payments to Acquire Equity Method Investments	4,465,000	8,000	10,431,000
Challenger [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	49,897,000	37,737,000
Income (Loss) from Equity Method Investments	20,921,000	14,831,000	11,899,000
Equity Method Investment, Ownership Percentage					49.90%
Green Brick Mortgage, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	307,000	715,000
Income (Loss) from Equity Method Investments	$ 733,000	2,464,000	4,727,000
Equity Method Investment, Ownership Percentage	49.90%
Providence Group Title, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	$ 0	0	12,000
Equity Method Investment, Ownership Percentage	49.00%
EJB River Holdings, LLC [Member]
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 10,600,000
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	8,554,000	6,130,000
Income (Loss) from Equity Method Investments	$ 2,424,000	833,000	(2,000)
Equity Method Investment, Ownership Percentage	50.00%
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 10,600,000
BHome Mortgage [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	1,147,000	1,180,000
Income (Loss) from Equity Method Investments	$ 1,548,000	1,585,000	18,000
Equity Method Investment, Ownership Percentage	49.00%
GBTM Sendera [Member]
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 13,500,000
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 14,319,000	9,854,000
Equity Method Investment, Ownership Percentage	50.00%
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 13,500,000
Equity Method Investment, Nonconsolidated Investee, Other
Schedule of Equity Method Investments [Line Items]
Revenues	301,818,000	221,190,000	181,724,000
Costs and Expenses	250,240,000	181,429,000	145,525,000
Net income	51,578,000	39,761,000	36,199,000
Cash	15,265,000	15,903,000
Accounts and Other Receivables, Net, Current	4,972,000	4,787,000
Financing Receivable, after Allowance for Credit Loss	10,381,000	5,772,000
Financing Receivable, Held-for-Sale	8,829,000	20,734,000
Inventory, Net	195,732,000	166,861,000
Other Assets, Current	9,352,000	7,220,000
Assets	244,531,000	221,277,000
Accounts Payable, Current	10,166,000	7,701,000
Accrued Liabilities, Current	12,177,000	13,992,000
Notes Payable, Current	82,484,000	95,816,000
Liabilities	104,827,000	117,509,000
Stockholders' Equity Attributable to Parent	70,812,000	52,983,000
Stockholders' Equity Attributable to Noncontrolling Interest	68,892,000	50,785,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	139,704,000	103,768,000
Liabilities and Equity	244,531,000	$ 221,277,000
EJB River Holdings, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Assets	30,600,000
Liabilities	13,500,000
GBTM Sendera [Member]
Schedule of Equity Method Investments [Line Items]
Assets	35,200,000
Liabilities	8,300,000
Contributions of LLC Members	$ 3,600,000		$ 9,800,000