Investment in Unconsolidated Entities (Summary of Financial Information of Investment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Assets:
Cash	$ 5,831		$ 14,584
Accounts receivable	2,100		1,259
EquityMethodInvestmentsSummarizedFinancialInformationBondsReceivable	5,864		5,864
EquityMethodInvestmentSummarizedFinancialInformationLoansHeldForSale	2,732		3,083
Inventory	50,065		44,375
Other assets	3,797		3,132
Total assets	70,389		72,297
Liabilities:
Accounts payable	3,717		2,173
Accrued expenses and other liabilities	5,284		5,328
Notes payable	26,748		31,402
Total liabilities	35,749		38,903
Owners’ equity:
Green Brick	17,272		15,653
Others	17,368		17,741
Total owners’ equity	34,640		33,394
Total liabilities and owners’ equity	70,389		$ 72,297
Statements of Income (Unaudited)
Revenues	31,097	$ 33,103
Costs and expenses	27,317	30,025
Net earnings of unconsolidated entities	3,780	3,078
Company’s share in net earnings of unconsolidated entities	$ 1,846	$ 1,536