Bonds Payable - Schedule of Long-term Debt Instruments (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) ft²	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Bonds	$ 210,723	$ 245,988
Less unamortized deferred issuance costs	(7,132)	(8,100)
Bonds payable	$ 203,591	237,888
Browning Place
Debt Instrument [Line Items]
Land collateral (acres) | ft²	625,297
Series A Bonds
Debt Instrument [Line Items]
Bonds	$ 78,183	95,133
Interest Rate	7.30%
Series B Bonds
Debt Instrument [Line Items]
Bonds	$ 57,975	65,318
Interest Rate	6.80%
Series C Bonds
Debt Instrument [Line Items]
Bonds	$ 74,565	$ 85,537
Interest Rate	4.65%