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Related Party Transactions Stratus Kingwood, L.P. (Details) $ in Thousands	Aug. 03, 2018 USD ($) a	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)
Related Party Transaction [Line Items]
Cash and cash equivalents		$ 16,138	$ 19,173
Restricted cash		18,734	19,418
Real estate under development		94,351	95,026
Land available for development		56,574	45,539
Other assets		13,960	14,548
Total assets		551,705	561,368	$ 542,731
Debt		363,849	365,749
Total liabilities		415,718	427,286
The Saint Mary, L.P. and Stratus Kingwood, L.P. [Member]
Related Party Transaction [Line Items]
Cash and cash equivalents		2,525	1,110
Real estate under development		10,741	3,703
Land available for development		4,210	9,273
Real estate held for investment, net		63,901	64,637
Other assets		1,954	1,807
Total assets		83,331	80,530
Accounts payable and accrued liabilities		5,586	8,680
Debt		53,310	45,848
Total liabilities		58,896	54,528
Net Assets		$ 24,435	$ 26,002
Stratus Kingwood, L.P. [Member]
Related Party Transaction [Line Items]
Proceeds from Issuance of Private Placement	$ 10,700
Area of Land \| a	54
Kingwood Place [Member]
Related Party Transaction [Line Items]
Payments to Acquire Land	$ 13,500
Land [Member] \| Stratus Kingwood, L.P. [Member]
Related Party Transaction [Line Items]
Proceeds from Issuance of Private Placement	$ 7,000
Stratus Kingwood, L.P. [Member] \| LCHM Holdings, L.L.C. [Member]
Related Party Transaction [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	8.80%
Kingwood Place Loan [Member] \| Notes Payable to Banks [Member] \| Stratus Kingwood, L.P. [Member]
Related Party Transaction [Line Items]
Long-term Debt, Gross	$ 6,750