SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Encumbrances	$ 306,916
Initial Cost, Land	122,968
Initial Cost, Buildings	297,644
Cost Capitalized Subsequent to Acquisition	39,189
Land	130,691
Building & Improvements	329,110
Total	459,801	$ 477,963	$ 463,732	$ 1,165,662
Accumulated Depreciation	82,418	$ 90,173	$ 79,228	$ 177,546
Multifamily
Encumbrances	119,104
Initial Cost, Land	16,847
Initial Cost, Buildings	150,481
Cost Capitalized Subsequent to Acquisition	437
Land	17,225
Building & Improvements	150,540
Total	167,765
Accumulated Depreciation	13,736
Multifamily | Chelsea
Encumbrances	8,194
Initial Cost, Land	1,225
Initial Cost, Buildings	11,230
Cost Capitalized Subsequent to Acquisition	6
Land	1,231
Building & Improvements	11,230
Total	12,461
Accumulated Depreciation	596
Multifamily | Forest Grove
Encumbrances	7,333
Initial Cost, Land	1,440
Initial Cost, Buildings	10,234
Cost Capitalized Subsequent to Acquisition	26
Land	1,440
Building & Improvements	10,260
Total	11,700
Accumulated Depreciation	150
Multifamily | Landing Bayou
Encumbrances	14,643
Initial Cost, Land	2,011
Initial Cost, Buildings	18,255
Cost Capitalized Subsequent to Acquisition	14
Land	2,011
Building & Improvements	18,269
Total	20,280
Accumulated Depreciation	948
Multifamily | Legacy at Pleasant Grove
Encumbrances	13,653
Initial Cost, Land	2,005
Initial Cost, Buildings	18,109
Cost Capitalized Subsequent to Acquisition	0
Land	2,005
Building & Improvements	18,109
Total	20,114
Accumulated Depreciation	2,761
Multifamily | Overlook at Allenville Phase II
Encumbrances	15,621
Initial Cost, Land	2,410
Initial Cost, Buildings	17,033
Cost Capitalized Subsequent to Acquisition	12
Land	2,410
Building & Improvements	17,045
Total	19,455
Accumulated Depreciation	749
Multifamily | Parc at Denham Springs II
Encumbrances	16,128
Initial Cost, Land	1,505
Initial Cost, Buildings	16,975
Cost Capitalized Subsequent to Acquisition	0
Land	1,505
Building & Improvements	16,975
Total	18,480
Accumulated Depreciation	449
Multifamily | Sugar Mill Phase III
Encumbrances	9,298
Initial Cost, Land	576
Initial Cost, Buildings	9,755
Cost Capitalized Subsequent to Acquisition	7
Land	576
Building & Improvements	9,762
Total	10,338
Accumulated Depreciation	138
Multifamily | Toulon
Encumbrances	13,975
Initial Cost, Land	1,621
Initial Cost, Buildings	20,107
Cost Capitalized Subsequent to Acquisition	372
Land	1,993
Building & Improvements	20,107
Total	22,100
Accumulated Depreciation	4,775
Multifamily | Villas at Bon Secour
Encumbrances	10,280
Initial Cost, Land	2,715
Initial Cost, Buildings	15,385
Cost Capitalized Subsequent to Acquisition	0
Land	2,715
Building & Improvements	15,385
Total	18,100
Accumulated Depreciation	929
Multifamily | Vista Ridge
Encumbrances	9,979
Initial Cost, Land	1,339
Initial Cost, Buildings	13,398
Cost Capitalized Subsequent to Acquisition	0
Land	1,339
Building & Improvements	13,398
Total	14,737
Accumulated Depreciation	2,241
Development
Encumbrances	0
Initial Cost, Land	6,637
Initial Cost, Buildings	0
Cost Capitalized Subsequent to Acquisition	532
Land	6,637
Building & Improvements	532
Total	7,169
Accumulated Depreciation	0
Development | Forest Pines
Encumbrances	0
Initial Cost, Land	3,600
Initial Cost, Buildings	0
Cost Capitalized Subsequent to Acquisition	301
Land	3,600
Building & Improvements	301
Total	3,901
Accumulated Depreciation	0
Development | Heritage McKinney
Encumbrances	0
Initial Cost, Land	3,037
Initial Cost, Buildings	0
Cost Capitalized Subsequent to Acquisition	231
Land	3,037
Building & Improvements	231
Total	3,268
Accumulated Depreciation	0
Commercial
Encumbrances	172,090
Initial Cost, Land	33,534
Initial Cost, Buildings	147,163
Cost Capitalized Subsequent to Acquisition	30,875
Land	33,534
Building & Improvements	178,038
Total	211,572
Accumulated Depreciation	68,682
Commercial | 600 Las Colinas
Encumbrances	35,589
Initial Cost, Land	5,751
Initial Cost, Buildings	55,460
Cost Capitalized Subsequent to Acquisition	9,609
Land	5,751
Building & Improvements	65,069
Total	70,820
Accumulated Depreciation	27,702
Commercial | 770 South Post Oak
Encumbrances	11,871
Initial Cost, Land	1,763
Initial Cost, Buildings	16,312
Cost Capitalized Subsequent to Acquisition	615
Land	1,763
Building & Improvements	16,927
Total	18,690
Accumulated Depreciation	2,465
Commercial | Browning Place
Encumbrances	85,537
Initial Cost, Land	5,096
Initial Cost, Buildings	49,441
Cost Capitalized Subsequent to Acquisition	14,428
Land	5,096
Building & Improvements	63,869
Total	68,965
Accumulated Depreciation	24,624
Commercial | Standford Center
Encumbrances	39,093
Initial Cost, Land	20,278
Initial Cost, Buildings	25,876
Cost Capitalized Subsequent to Acquisition	6,223
Land	20,278
Building & Improvements	32,099
Total	52,377
Accumulated Depreciation	13,817
Commercial | Other Commercial
Encumbrances	0
Initial Cost, Land	646
Initial Cost, Buildings	74
Cost Capitalized Subsequent to Acquisition	0
Land	646
Building & Improvements	74
Total	720
Accumulated Depreciation	74
Land
Encumbrances	15,722
Initial Cost, Land	65,950
Initial Cost, Buildings	0
Cost Capitalized Subsequent to Acquisition	7,345
Land	73,295
Building & Improvements	0
Total	73,295
Accumulated Depreciation	0
Land | Mercer Crossing
Encumbrances	0
Initial Cost, Land	5,406
Initial Cost, Buildings	0
Cost Capitalized Subsequent to Acquisition	0
Land	5,406
Building & Improvements	0
Total	5,406
Accumulated Depreciation	0
Land | Windmill Farms
Encumbrances	10,397
Initial Cost, Land	43,973
Initial Cost, Buildings	0
Cost Capitalized Subsequent to Acquisition	4,329
Land	48,302
Building & Improvements	0
Total	48,302
Accumulated Depreciation	0
Land | Other Land
Encumbrances	5,325
Initial Cost, Land	16,571
Initial Cost, Buildings	0
Cost Capitalized Subsequent to Acquisition	3,016
Land	19,587
Building & Improvements	0
Total	19,587
Accumulated Depreciation	$ 0