Real Estate and Accumulated Depreciation (Schedule of Properties) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 716,593
Initial Cost to Company
Land and Improvements	745,461
Buildings and Improvements	5,233,567
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	55,328
Building and Improvements less Cost of Sales, Transfers and Other	1,123,713
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	800,789
Building and Improvements less Cost of Sales, Transfers and Other	6,357,280
Total	7,158,069	$ 4,121,286	$ 3,893,799	$ 3,814,986
Accumulated Depreciation	621,617	$ 421,495	$ 275,977	$ 215,856
OPERATING PROPERTIES
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	716,593
Initial Cost to Company
Land and Improvements	582,382
Buildings and Improvements	4,651,919
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	58,768
Building and Improvements less Cost of Sales, Transfers and Other	953,394
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	641,150
Building and Improvements less Cost of Sales, Transfers and Other	5,605,313
Total	6,246,463
Accumulated Depreciation	577,139
OPERATING PROPERTIES | Austin, TX | The Domain
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	52,511
Buildings and Improvements	617,001
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	3,958
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	52,511
Building and Improvements less Cost of Sales, Transfers and Other	620,959
Total	673,470
Accumulated Depreciation	$ 10,996
Life on Which Depreciation in 2016 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	2,571
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	249,797
Total	277,157
Accumulated Depreciation	$ 4,992
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Tempe Gateway
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	30,938
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	232,645
Total	266,486
Accumulated Depreciation	$ 26,574
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | Domain Point
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	14,237
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	190,772
Total	224,261
Accumulated Depreciation	$ 20,507
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Austin, TX | 816 Congress
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 79,987
Initial Cost to Company
Land and Improvements	6,817
Buildings and Improvements	89,891
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	20,682
Building and Improvements less Cost of Sales, Transfers and Other	27,198
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	27,499
Building and Improvements less Cost of Sales, Transfers and Other	117,089
Total	144,588
Accumulated Depreciation	$ 30,234
Life on Which Depreciation in 2016 Statement of Operations is Computed	42 years
OPERATING PROPERTIES | Austin, TX | Colorado Tower
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 117,085
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	20,607
Building and Improvements less Cost of Sales, Transfers and Other	120,902
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	22,207
Building and Improvements less Cost of Sales, Transfers and Other	120,902
Total	143,109
Accumulated Depreciation	$ 31,909
Life on Which Depreciation in 2016 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	236
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	71,835
Total	89,184
Accumulated Depreciation	$ 1,725
Life on Which Depreciation in 2016 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	42,390
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	42,390
Total	47,564
Accumulated Depreciation	$ 7,798
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Atlanta, GA | Terminus
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 194,225
Initial Cost to Company
Land and Improvements	49,345
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	6,592
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	49,345
Building and Improvements less Cost of Sales, Transfers and Other	417,418
Total	466,763
Accumulated Depreciation	$ 4,028
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Northpark
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	66,375
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	362,200
Total	384,550
Accumulated Depreciation	$ 70,498
Life on Which Depreciation in 2016 Statement of Operations is Computed	39 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	301,596
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	301,596
Total	330,153
Accumulated Depreciation	$ 19,008
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Fifth Third Center
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	10,070
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	244,181
Total	279,245
Accumulated Depreciation	$ 30,028
Life on Which Depreciation in 2016 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	20,425
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	196,578
Total	212,688
Accumulated Depreciation	$ 23,418
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Promenade
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 95,986
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	47,224
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	150,014
Total	163,453
Accumulated Depreciation	$ 55,183
Life on Which Depreciation in 2016 Statement of Operations is Computed	34 years
OPERATING PROPERTIES | Atlanta, GA | San Jacinto Center
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	9,276
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	117,453
Total	134,289
Accumulated Depreciation	$ 14,086
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 1200 Peachtree
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	0
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	19,495
Building and Improvements less Cost of Sales, Transfers and Other	62,836
Total	82,331
Accumulated Depreciation	$ 1,333
Life on Which Depreciation in 2016 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	2,412
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	72,135
Total	78,842
Accumulated Depreciation	$ 9,584
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | 8000 Avalon
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	4,130
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	72
Building and Improvements less Cost of Sales, Transfers and Other	72,953
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	4,202
Building and Improvements less Cost of Sales, Transfers and Other	72,953
Total	77,155
Accumulated Depreciation	$ 7,177
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Atlanta, GA | Meridian Mark Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22,978
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	30,500
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	30,500
Total	32,719
Accumulated Depreciation	$ 21,933
Life on Which Depreciation in 2016 Statement of Operations is Computed	30 years
OPERATING PROPERTIES | Fort Worth, TX | Burnett Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	28,756
Buildings and Improvements	90,104
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(281)
Building and Improvements less Cost of Sales, Transfers and Other	1,611
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	28,475
Building and Improvements less Cost of Sales, Transfers and Other	91,715
Total	120,190
Accumulated Depreciation	$ 2,633
Life on Which Depreciation in 2016 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	7,298
Buildings and Improvements	272,148
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	17,566
Building and Improvements less Cost of Sales, Transfers and Other	47,407
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	24,864
Building and Improvements less Cost of Sales, Transfers and Other	319,555
Total	344,419
Accumulated Depreciation	$ 39,254
Life on Which Depreciation in 2016 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	5,954
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	60,648
Total	70,052
Accumulated Depreciation	$ 8,881
Life on Which Depreciation in 2016 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	7,979
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	47,115
Total	57,915
Accumulated Depreciation	$ 5,767
Life on Which Depreciation in 2016 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	24,476
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	287,054
Total	299,904
Accumulated Depreciation	$ 38,320
Life on Which Depreciation in 2016 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	6,542
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	101,672
Total	107,565
Accumulated Depreciation	$ 12,089
Life on Which Depreciation in 2016 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	16,964
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	73,611
Total	79,560
Accumulated Depreciation	$ 7,271
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Bank of America Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	32,091
Buildings and Improvements	229,840
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(147)
Building and Improvements less Cost of Sales, Transfers and Other	4,059
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	31,944
Building and Improvements less Cost of Sales, Transfers and Other	233,899
Total	265,843
Accumulated Depreciation	$ 8,030
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Fifth Third Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 140,332
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	21,404
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	201,834
Total	224,425
Accumulated Depreciation	$ 39,706
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Charlotte, NC | Legacy Union One
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	3,213
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	118,451
Total	118,502
Accumulated Depreciation	$ 15,325
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 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	2,855
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	199,770
Total	233,256
Accumulated Depreciation	$ 4,692
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Dallas, GA | Legacy Union One
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 66,000
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	0
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	128,740
Total	141,789
Accumulated Depreciation	$ 2,679
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
OPERATING PROPERTIES | Dallas, GA | 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	1,077
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	66,996
Total	75,036
Accumulated Depreciation	$ 1,481
Life on Which Depreciation in 2016 Statement of Operations is Computed	40 years
HELD FOR SALE
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company
Land and Improvements	12,257
Buildings and Improvements	341,935
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	30,457
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	12,257
Building and Improvements less Cost of Sales, Transfers and Other	372,392
Total	384,649
Accumulated Depreciation	44,478
HELD FOR SALE | Charlotte, NC | Hearst Tower
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	9,977
Buildings and Improvements	323,299
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	28,455
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	9,977
Building and Improvements less Cost of Sales, Transfers and Other	351,754
Total	361,731
Accumulated Depreciation	44,478
HELD FOR SALE | Cherry Hill, NJ | Woodcrest
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	2,280
Buildings and Improvements	18,636
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	2,002
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	2,280
Building and Improvements less Cost of Sales, Transfers and Other	20,638
Total	22,918
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	30,519
Buildings and Improvements	239,713
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	3
Building and Improvements less Cost of Sales, Transfers and Other	139,862
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	30,522
Building and Improvements less Cost of Sales, Transfers and Other	379,575
Total	410,097
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT | Austin, TX | Domain 12
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	12,725
Buildings and Improvements	138,148
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	21,100
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	12,725
Building and Improvements less Cost of Sales, Transfers and Other	159,248
Total	171,973
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT | Austin, TX | Domain 10
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	11,975
Buildings and Improvements	101,565
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	35,012
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	11,975
Building and Improvements less Cost of Sales, Transfers and Other	136,577
Total	148,552
Accumulated Depreciation	0
PROJECTS UNDER DEVELOPMENT | Suburban Atlanta, GA | 10000 Avalon
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	5,819
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	3
Building and Improvements less Cost of Sales, Transfers and Other	83,750
Gross Amount at Which Carried at Close of Period
Land and Improvements less Cost of Sales, Transfers and Other	5,822
Building and Improvements less Cost of Sales, Transfers and Other	83,750
Total	89,572
Accumulated Depreciation	0
LAND
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	120,303
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(3,443)
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	116,860
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	116,860
Accumulated Depreciation	0
LAND | Austin, TX | Domain 14 & 15
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 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	0
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	0
Total	16,640
Accumulated Depreciation	0
LAND | Atlanta, GA | 901 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	3,741
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	15,624
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	15,624
Accumulated Depreciation	0
LAND | Atlanta, GA | 3354 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	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	13,410
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	13,410
Accumulated Depreciation	0
LAND | Fort Worth, TX | Burnett Plaza - Adjacent Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	3,900
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	3,900
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	3,900
Accumulated Depreciation	0
LAND | Tampa, FL | Corporate Center 5
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	356
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	356
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	356
Accumulated Depreciation	0
LAND | Phoenix, AZ | 100 Mill
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	19,506
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	19,506
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	19,506
Accumulated Depreciation	0
LAND | Dallas, GA | 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	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	22,724
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	22,724
Accumulated Depreciation	0
LAND | Suburban Atlanta, GA | The Avenue Forsyth - Adjacent Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company
Land and Improvements	11,240
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition
Land and Improvements less Cost of Sales, Transfers and Other	(7,540)
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	3,700
Building and Improvements less Cost of Sales, Transfers and Other	0
Total	3,700
Accumulated Depreciation	$ 0