Schedule III - Real Estate and Accumulated Depreciation - Schedule of Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 526,968
Initial Cost to Company
Land and Improvements	776,840
Buildings and Improvements	5,303,404
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	65,955
Building and Improvements less Cost of Sales, Transfers and Other	2,245,912
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	842,795
Building and Improvements less Cost of Sales, Transfers and Other	7,549,316
Total	8,392,111
Accumulated Depreciation	1,329,406	$ 1,079,662	$ 874,988	$ 811,196
OPERATING PROPERTIES
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	526,968
Initial Cost to Company
Land and Improvements	628,064
Buildings and Improvements	5,303,404
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	43,363
Building and Improvements less Cost of Sales, Transfers and Other	2,129,668
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	671,427
Building and Improvements less Cost of Sales, Transfers and Other	7,433,072
Total	8,104,499
Accumulated Depreciation	1,329,406
OPERATING PROPERTIES | Miscellaneous Investments
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	15,318
Buildings and Improvements	69,780
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	32
Building and Improvements less Cost of Sales, Transfers and Other	2,369
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	15,351
Building and Improvements less Cost of Sales, Transfers and Other	72,149
Total	87,500
Accumulated Depreciation	6,671
OPERATING PROPERTIES | Austin, TX | The Domain
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	72,558
Initial Cost to Company
Land and Improvements	65,236
Buildings and Improvements	755,143
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	6,006
Building and Improvements less Cost of Sales, Transfers and Other	293,326
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	71,242
Building and Improvements less Cost of Sales, Transfers and Other	1,048,469
Total	1,119,711
Accumulated Depreciation	$ 139,760
OPERATING PROPERTIES | Austin, TX | The Domain | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | The Domain | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Austin 300 Colorado Project, LP
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	18,354
Buildings and Improvements	278,905
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(33)
Building and Improvements less Cost of Sales, Transfers and Other	47,053
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	18,321
Building and Improvements less Cost of Sales, Transfers and Other	325,958
Total	344,279
Accumulated Depreciation	$ 18,155
OPERATING PROPERTIES | Austin, TX | Austin 300 Colorado Project, LP | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | Austin 300 Colorado Project, LP | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | The Terrace
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	27,360
Buildings and Improvements	247,226
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	31,244
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	27,360
Building and Improvements less Cost of Sales, Transfers and Other	278,470
Total	305,830
Accumulated Depreciation	$ 40,047
OPERATING PROPERTIES | Austin, TX | The Terrace | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | The Terrace | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | One Eleven Congress
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	33,841
Buildings and Improvements	201,707
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	57,517
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	33,841
Building and Improvements less Cost of Sales, Transfers and Other	259,224
Total	293,065
Accumulated Depreciation	$ 53,071
OPERATING PROPERTIES | Austin, TX | One Eleven Congress | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | One Eleven Congress | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | San Jacinto Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	34,068
Buildings and Improvements	176,535
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(579)
Building and Improvements less Cost of Sales, Transfers and Other	43,313
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	33,489
Building and Improvements less Cost of Sales, Transfers and Other	219,848
Total	253,337
Accumulated Depreciation	$ 42,156
OPERATING PROPERTIES | Austin, TX | San Jacinto Center | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | San Jacinto Center | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Colorado Tower
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 106,862
Initial Cost to Company
Land and Improvements	1,600
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	20,543
Building and Improvements less Cost of Sales, Transfers and Other	128,129
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,143
Building and Improvements less Cost of Sales, Transfers and Other	128,129
Total	150,272
Accumulated Depreciation	$ 46,605
OPERATING PROPERTIES | Austin, TX | Colorado Tower | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | Colorado Tower | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Austin, TX | Domain Point
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	17,349
Buildings and Improvements	71,599
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	13,017
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	17,349
Building and Improvements less Cost of Sales, Transfers and Other	84,616
Total	101,965
Accumulated Depreciation	$ 15,475
OPERATING PROPERTIES | Austin, TX | Domain Point | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | Domain Point | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Research Park V
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	4,373
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	801
Building and Improvements less Cost of Sales, Transfers and Other	43,313
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,174
Building and Improvements less Cost of Sales, Transfers and Other	43,313
Total	48,487
Accumulated Depreciation	$ 14,530
OPERATING PROPERTIES | Austin, TX | Research Park V | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Austin, TX | Research Park V | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Atlanta, GA | Terminus
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 221,000
Initial Cost to Company
Land and Improvements	49,050
Buildings and Improvements	410,826
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	56,001
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	49,050
Building and Improvements less Cost of Sales, Transfers and Other	466,827
Total	515,877
Accumulated Depreciation	$ 68,036
OPERATING PROPERTIES | Atlanta, GA | Terminus | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Terminus | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Northpark Town Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	22,350
Buildings and Improvements	295,825
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	78,476
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,350
Building and Improvements less Cost of Sales, Transfers and Other	374,301
Total	396,651
Accumulated Depreciation	$ 107,286
OPERATING PROPERTIES | Atlanta, GA | Northpark Town Center | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Northpark Town Center | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	39 years
OPERATING PROPERTIES | Atlanta, GA | Buckhead Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	35,064
Buildings and Improvements	234,111
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	67,265
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	35,064
Building and Improvements less Cost of Sales, Transfers and Other	301,376
Total	336,440
Accumulated Depreciation	$ 57,734
OPERATING PROPERTIES | Atlanta, GA | Buckhead Plaza | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Buckhead Plaza | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Spring & 8th
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	28,131
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	426
Building and Improvements less Cost of Sales, Transfers and Other	301,770
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	28,557
Building and Improvements less Cost of Sales, Transfers and Other	301,770
Total	330,327
Accumulated Depreciation	$ 62,658
OPERATING PROPERTIES | Atlanta, GA | Spring & 8th | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Spring & 8th | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 725 Ponce
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	20,720
Buildings and Improvements	272,226
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	16,615
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	20,720
Building and Improvements less Cost of Sales, Transfers and Other	288,841
Total	309,561
Accumulated Depreciation	$ 21,331
OPERATING PROPERTIES | Atlanta, GA | 725 Ponce | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | 725 Ponce | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 3344 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	16,110
Buildings and Improvements	176,153
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	40,292
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	16,110
Building and Improvements less Cost of Sales, Transfers and Other	216,445
Total	232,555
Accumulated Depreciation	$ 49,467
OPERATING PROPERTIES | Atlanta, GA | 3344 Peachtree | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | 3344 Peachtree | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Promenade Tower
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	13,439
Buildings and Improvements	102,790
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	77,189
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	13,439
Building and Improvements less Cost of Sales, Transfers and Other	179,979
Total	193,418
Accumulated Depreciation	$ 63,977
OPERATING PROPERTIES | Atlanta, GA | Promenade Tower | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Promenade Tower | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	34 years
OPERATING PROPERTIES | Atlanta, GA | Avalon
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	9,952
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	73
Building and Improvements less Cost of Sales, Transfers and Other	181,342
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	10,025
Building and Improvements less Cost of Sales, Transfers and Other	181,342
Total	191,367
Accumulated Depreciation	$ 36,671
OPERATING PROPERTIES | Atlanta, GA | Avalon | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Avalon | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 3350 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	16,836
Buildings and Improvements	108,177
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	55,838
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	16,836
Building and Improvements less Cost of Sales, Transfers and Other	164,015
Total	180,851
Accumulated Depreciation	$ 24,328
OPERATING PROPERTIES | Atlanta, GA | 3350 Peachtree | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | 3350 Peachtree | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Promenade Central
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	19,495
Buildings and Improvements	62,836
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	91,882
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	19,494
Building and Improvements less Cost of Sales, Transfers and Other	154,718
Total	174,212
Accumulated Depreciation	$ 8,662
OPERATING PROPERTIES | Atlanta, GA | Promenade Central | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Promenade Central | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 3348 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	6,707
Buildings and Improvements	69,723
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	6,387
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	6,707
Building and Improvements less Cost of Sales, Transfers and Other	76,110
Total	82,817
Accumulated Depreciation	$ 17,360
OPERATING PROPERTIES | Atlanta, GA | 3348 Peachtree | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | 3348 Peachtree | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Meridian Mark Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	2,219
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	25,658
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	2,219
Building and Improvements less Cost of Sales, Transfers and Other	25,658
Total	27,877
Accumulated Depreciation	$ 17,839
OPERATING PROPERTIES | Atlanta, GA | Meridian Mark Plaza | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Atlanta, GA | Meridian Mark Plaza | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Houston, TX | Briarlake Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	33,486
Buildings and Improvements	196,915
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	75,801
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	33,486
Building and Improvements less Cost of Sales, Transfers and Other	272,716
Total	306,202
Accumulated Depreciation	$ 34,758
OPERATING PROPERTIES | Houston, TX | Briarlake Plaza | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Houston, TX | Briarlake Plaza | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Tampa, FL | Corporate Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	2,468
Buildings and Improvements	272,148
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	16,468
Building and Improvements less Cost of Sales, Transfers and Other	70,699
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	18,936
Building and Improvements less Cost of Sales, Transfers and Other	342,847
Total	361,783
Accumulated Depreciation	$ 84,574
OPERATING PROPERTIES | Tampa, FL | Corporate Center | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Tampa, FL | Corporate Center | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Tampa, FL | Heights Union
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	9,545
Buildings and Improvements	123,944
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	21,067
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	9,545
Building and Improvements less Cost of Sales, Transfers and Other	145,011
Total	154,556
Accumulated Depreciation	$ 11,565
OPERATING PROPERTIES | Tampa, FL | Heights Union | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Tampa, FL | Heights Union | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Tampa, FL | The Pointe
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	9,404
Buildings and Improvements	54,694
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	12,180
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	9,404
Building and Improvements less Cost of Sales, Transfers and Other	66,874
Total	76,278
Accumulated Depreciation	$ 15,842
OPERATING PROPERTIES | Tampa, FL | The Pointe | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Tampa, FL | The Pointe | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Tampa, FL | Harborview Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	10,800
Buildings and Improvements	39,136
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	10,757
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	10,800
Building and Improvements less Cost of Sales, Transfers and Other	49,893
Total	60,693
Accumulated Depreciation	$ 12,424
OPERATING PROPERTIES | Tampa, FL | Harborview Plaza | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Tampa, FL | Harborview Plaza | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Phoenix, AZ | Hayden Ferry
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	13,102
Buildings and Improvements	262,578
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(252)
Building and Improvements less Cost of Sales, Transfers and Other	22,255
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	12,850
Building and Improvements less Cost of Sales, Transfers and Other	284,833
Total	297,683
Accumulated Depreciation	$ 61,418
OPERATING PROPERTIES | Phoenix, AZ | Hayden Ferry | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Phoenix, AZ | Hayden Ferry | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Phoenix, AZ | 100 Mill
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	13,156
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	5
Building and Improvements less Cost of Sales, Transfers and Other	173,434
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	13,161
Building and Improvements less Cost of Sales, Transfers and Other	173,434
Total	186,595
Accumulated Depreciation	$ 12,650
OPERATING PROPERTIES | Phoenix, AZ | 100 Mill | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Phoenix, AZ | 100 Mill | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Phoenix, AZ | Tempe Gateway
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	5,893
Buildings and Improvements	95,130
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	23,282
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,893
Building and Improvements less Cost of Sales, Transfers and Other	118,412
Total	124,305
Accumulated Depreciation	$ 20,098
OPERATING PROPERTIES | Phoenix, AZ | Tempe Gateway | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Phoenix, AZ | Tempe Gateway | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Phoenix, AZ | 111 West Rio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	6,076
Buildings and Improvements	56,647
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(127)
Building and Improvements less Cost of Sales, Transfers and Other	19,101
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,949
Building and Improvements less Cost of Sales, Transfers and Other	75,748
Total	81,697
Accumulated Depreciation	$ 20,182
OPERATING PROPERTIES | Phoenix, AZ | 111 West Rio | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Phoenix, AZ | 111 West Rio | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Fifth Third Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 126,548
Initial Cost to Company
Land and Improvements	22,591
Buildings and Improvements	180,430
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	21,809
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,591
Building and Improvements less Cost of Sales, Transfers and Other	202,239
Total	224,830
Accumulated Depreciation	$ 62,957
OPERATING PROPERTIES | Charlotte, NC | Fifth Third Center | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Charlotte, NC | Fifth Third Center | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | The RailYard
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	22,831
Buildings and Improvements	178,323
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	1,973
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,831
Building and Improvements less Cost of Sales, Transfers and Other	180,296
Total	203,127
Accumulated Depreciation	$ 18,738
OPERATING PROPERTIES | Charlotte, NC | The RailYard | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Charlotte, NC | The RailYard | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | 550 South
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	51
Buildings and Improvements	115,238
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	8,734
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	51
Building and Improvements less Cost of Sales, Transfers and Other	123,972
Total	124,023
Accumulated Depreciation	$ 29,176
OPERATING PROPERTIES | Charlotte, NC | 550 South | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Charlotte, NC | 550 South | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Dallas, TX | Legacy Union One
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	13,049
Buildings and Improvements	128,740
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	231
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	13,049
Building and Improvements less Cost of Sales, Transfers and Other	128,971
Total	142,020
Accumulated Depreciation	$ 22,295
OPERATING PROPERTIES | Dallas, TX | Legacy Union One | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Dallas, TX | Legacy Union One | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Dallas, TX | 5950 Sherry Lane
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	8,040
Buildings and Improvements	65,919
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	10,349
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	8,040
Building and Improvements less Cost of Sales, Transfers and Other	76,268
Total	84,308
Accumulated Depreciation	$ 10,910
OPERATING PROPERTIES | Dallas, TX | 5950 Sherry Lane | Minimum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	5 years
OPERATING PROPERTIES | Dallas, TX | 5950 Sherry Lane | Maximum
Gross Amount at Which Carried  at Close of Period
Life on Which Depreciation in 2021 Statement of Operations is Computed	40 years
PROJECTS UNDER DEVELOPMENT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	16,640
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	116,244
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	16,640
Building and Improvements less Cost of Sales, Transfers and Other	116,244
Total	132,884
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT | Austin, TX | Domain 9
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	16,640
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	116,244
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	16,640
Building and Improvements less Cost of Sales, Transfers and Other	116,244
Total	132,884
Accumulated Depreciation	0
LAND
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	132,136
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	22,592
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	154,728
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	154,728
Accumulated Depreciation	0
LAND | Austin, TX | Domain Central
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	21,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	21,000
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	21,000
Accumulated Depreciation	0
LAND | Austin, TX | Domain Point 3
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	11,018
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	11,018
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	11,018
Accumulated Depreciation	0
LAND | Atlanta, GA | 887 West Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	11,883
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	14,429
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	26,312
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	26,312
Accumulated Depreciation	0
LAND | Atlanta, GA | 3354/3356 Peachtree
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	13,410
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	8,099
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	21,509
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	21,509
Accumulated Depreciation	0
LAND | Tampa, FL | Corporate Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	5,188
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(10)
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,178
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	5,178
Accumulated Depreciation	0
LAND | Charlotte, NC | South End Station
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	28,134
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	0
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	28,134
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	28,134
Accumulated Depreciation	0
LAND | Charlotte, NC | 303 Tremont
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	18,779
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	75
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	18,854
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	18,854
Accumulated Depreciation	0
LAND | Dallas, TX | Legacy Union 2 & 3
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	22,724
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(1)
Building and Improvements less Cost of Sales, Transfers and Other	0
Gross Amount at Which Carried  at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,723
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	22,723
Accumulated Depreciation	$ 0