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v3.21.1

Mortgages and Other Notes Payable - Schedule of Debt (Details) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 04, 2021 | Dec. 31, 2020 USD ($) | Mar. 05, 2020 a | Dec. 31, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 242,711 |  | $ 249,854
600 Las Colinas |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 35,589 |  | 36,302
Interest rate |  | 5.30% |  |
770 South Post Oak |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 11,871 |  | 12,077
Interest rate |  | 4.40% |  |
Bridge View Plaza |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 0 |  | 3,824
Interest rate |  | 7.75% |  |
Chelsea |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 8,194 |  | 8,749
Interest rate |  | 3.40% |  |
EQK Portage - Land |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 3,350 |  | 0
Interest rate |  | 10.00% |  |
Area of land (acres) | a |  |  | 49.2 |
HSW Partners |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 17,790 |  | 17,359
Interest rate |  | 9.50% |  |
Farnham Park |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 0 |  | 9,144
Interest rate |  | 3.39% |  |
Forest Grove |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 7,333 |  | 1,390
Interest rate |  | 3.75% |  |
Forest Grove | Prime Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Variable interest rate |  | 0.50% |  |
Landing Bayou |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 14,643 |  | 15,467
Interest rate |  | 3.50% |  |
Athens |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 1,155 |  | 1,155
Interest rate |  | 5.90% |  |
Legacy at Pleasant Grove |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 13,653 |  | 13,944
Interest rate |  | 3.60% |  |
McKinney 36 Land |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 820 |  | 944
Interest rate |  | 8.00% |  |
New Concept Energy |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 3,542 |  | 4,000
Interest rate |  | 6.00% |  |
Overlook at Allenville Phase II |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 15,621 |  | 15,798
Interest rate |  | 3.80% |  |
Parc at Denham Springs II |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 16,128 |  | 14,785
Interest rate |  | 4.10% |  |
Standford Center |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 39,093 |  | 39,255
Interest rate |  | 6.00% |  |
Sugar Mill Phase III |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 9,298 |  | 5,908
Interest rate |  | 4.50% |  |
Toulon |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 13,975 |  | 14,219
Interest rate |  | 3.20% |  |
Villager |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 0 |  | 556
Interest rate |  | 2.50% |  |
Villas at Bon Secour |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 10,280 |  | 11,026
Interest rate |  | 4.00% |  |
Vista Ridge |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 9,979 |  | 10,122
Interest rate |  | 4.00% |  |
Windmill Farms |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and other notes payable |  | $ 10,397 |  | $ 13,830
Interest rate |  | 6.00% |  |
Windmill Farms | Subsequent Event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate | 5.00% |  |  |

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