Schedule III - Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Real Estate and Accumulated Depreciation [Line Items]
Gross Amount at Which Carried, Total	$ 4,506,328	$ 4,206,993	$ 3,891,426
Accumulated Depreciation and Amortization	1,005,704	961,682	835,392
Tax basis of total assets	3,900,000
Impairment losses	25,981	41,000	0
Real Estate:
Balance at the beginning of the year	4,206,993	3,891,426	3,818,287
Additions to/improvements of real estate	565,552	379,516	493,760
Assets disposed	(214,728)	0	(393,231)
Assets impaired	(10,000)	(41,000)	0
Write-offs of intangible assets	(26,430)	(13,646)	(15,891)
Write-offs of fully depreciated/amortized assets	(15,059)	(9,303)	(11,499)
Balance at the end of the year	4,506,328	4,206,993	3,891,426
Accumulated Depreciation and Amortization:
Balance at the beginning of the year	961,682	835,392	875,777
Depreciation and amortization	166,234	149,239	142,762
Assets disposed	(80,723)	0	(155,757)
Write-offs of intangible assets	(26,430)	(13,646)	(15,891)
Write-offs of fully depreciated/amortized assets	(15,059)	(9,303)	(11,499)
Balance at the end of the year	$ 1,005,704	961,682	$ 835,392
Buildings
Real Estate and Accumulated Depreciation [Line Items]
Useful life	40 years
Wholly Owned Properties
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land	$ 546,496
Initial Cost, Buildings and Improvements	3,436,705
Initial Cost, Total	3,983,201
Costs Capitalized Subsequent to Acquisition	523,127
Gross Amount at Which Carried, Land	567,244
Gross Amount at Which Carried, Buildings and Improvements	3,939,084
Gross Amount at Which Carried, Total	4,506,328
Accumulated Depreciation and Amortization	1,005,704
Real Estate:
Balance at the end of the year	4,506,328
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 1,005,704
Minimum | Building improvements
Real Estate and Accumulated Depreciation [Line Items]
Useful life	5 years
Minimum | Land improvements
Real Estate and Accumulated Depreciation [Line Items]
Useful life	20 years
Maximum | Building improvements
Real Estate and Accumulated Depreciation [Line Items]
Useful life	25 years
Maximum | Land improvements
Real Estate and Accumulated Depreciation [Line Items]
Useful life	25 years
1430 ENCLAVE PARKWAY
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 7,100
Initial Cost, Buildings and Improvements	37,915
Initial Cost, Total	45,015
Costs Capitalized Subsequent to Acquisition	7,248
Gross Amount at Which Carried, Land	5,506
Gross Amount at Which Carried, Buildings and Improvements	46,757
Gross Amount at Which Carried, Total	52,263
Accumulated Depreciation and Amortization	24,647
Real Estate:
Balance at the end of the year	52,263
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 24,647
1430 ENCLAVE PARKWAY | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
1430 ENCLAVE PARKWAY | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
CRESCENT RIDGE II
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 7,700
Initial Cost, Buildings and Improvements	45,154
Initial Cost, Total	52,854
Costs Capitalized Subsequent to Acquisition	12,887
Gross Amount at Which Carried, Land	8,021
Gross Amount at Which Carried, Buildings and Improvements	57,720
Gross Amount at Which Carried, Total	65,741
Accumulated Depreciation and Amortization	30,950
Real Estate:
Balance at the end of the year	65,741
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 30,950
CRESCENT RIDGE II | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
CRESCENT RIDGE II | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
90 CENTRAL STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 3,642
Initial Cost, Buildings and Improvements	29,497
Initial Cost, Total	33,139
Costs Capitalized Subsequent to Acquisition	3,408
Gross Amount at Which Carried, Land	3,642
Gross Amount at Which Carried, Buildings and Improvements	32,905
Gross Amount at Which Carried, Total	36,547
Accumulated Depreciation and Amortization	16,649
Real Estate:
Balance at the end of the year	36,547
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 16,649
90 CENTRAL STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
90 CENTRAL STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
6031 CONNECTION DRIVE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 3,157
Initial Cost, Buildings and Improvements	43,656
Initial Cost, Total	46,813
Costs Capitalized Subsequent to Acquisition	9,664
Gross Amount at Which Carried, Land	3,157
Gross Amount at Which Carried, Buildings and Improvements	53,320
Gross Amount at Which Carried, Total	56,477
Accumulated Depreciation and Amortization	25,236
Real Estate:
Balance at the end of the year	56,477
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 25,236
6031 CONNECTION DRIVE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
6031 CONNECTION DRIVE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
6021 CONNECTION DRIVE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 3,157
Initial Cost, Buildings and Improvements	42,662
Initial Cost, Total	45,819
Costs Capitalized Subsequent to Acquisition	12,160
Gross Amount at Which Carried, Land	3,157
Gross Amount at Which Carried, Buildings and Improvements	54,822
Gross Amount at Which Carried, Total	57,979
Accumulated Depreciation and Amortization	29,809
Real Estate:
Balance at the end of the year	57,979
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 29,809
6021 CONNECTION DRIVE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
6021 CONNECTION DRIVE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
6011 CONNECTION DRIVE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 3,157
Initial Cost, Buildings and Improvements	29,034
Initial Cost, Total	32,191
Costs Capitalized Subsequent to Acquisition	18,524
Gross Amount at Which Carried, Land	3,157
Gross Amount at Which Carried, Buildings and Improvements	47,558
Gross Amount at Which Carried, Total	50,715
Accumulated Depreciation and Amortization	18,888
Real Estate:
Balance at the end of the year	50,715
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 18,888
6011 CONNECTION DRIVE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
6011 CONNECTION DRIVE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
US BANCORP CENTER
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 11,138
Initial Cost, Buildings and Improvements	175,629
Initial Cost, Total	186,767
Costs Capitalized Subsequent to Acquisition	31,293
Gross Amount at Which Carried, Land	11,138
Gross Amount at Which Carried, Buildings and Improvements	206,922
Gross Amount at Which Carried, Total	218,060
Accumulated Depreciation and Amortization	105,153
Real Estate:
Balance at the end of the year	218,060
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 105,153
US BANCORP CENTER | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
US BANCORP CENTER | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
GLENRIDGE HIGHLANDS TWO
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 6,662
Initial Cost, Buildings and Improvements	69,031
Initial Cost, Total	75,693
Costs Capitalized Subsequent to Acquisition	(2,744)
Gross Amount at Which Carried, Land	6,662
Gross Amount at Which Carried, Buildings and Improvements	66,287
Gross Amount at Which Carried, Total	72,949
Accumulated Depreciation and Amortization	29,321
Real Estate:
Balance at the end of the year	72,949
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 29,321
GLENRIDGE HIGHLANDS TWO | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
GLENRIDGE HIGHLANDS TWO | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
400 VIRGINIA AVE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 22,146
Initial Cost, Buildings and Improvements	49,740
Initial Cost, Total	71,886
Costs Capitalized Subsequent to Acquisition	6,868
Gross Amount at Which Carried, Land	22,146
Gross Amount at Which Carried, Buildings and Improvements	56,608
Gross Amount at Which Carried, Total	78,754
Accumulated Depreciation and Amortization	24,751
Real Estate:
Balance at the end of the year	78,754
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 24,751
400 VIRGINIA AVE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
400 VIRGINIA AVE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
4250 NORTH FAIRFAX DRIVE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 13,636
Initial Cost, Buildings and Improvements	70,918
Initial Cost, Total	84,554
Costs Capitalized Subsequent to Acquisition	18,576
Gross Amount at Which Carried, Land	13,636
Gross Amount at Which Carried, Buildings and Improvements	89,494
Gross Amount at Which Carried, Total	103,130
Accumulated Depreciation and Amortization	43,595
Real Estate:
Balance at the end of the year	103,130
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 43,595
4250 NORTH FAIRFAX DRIVE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
4250 NORTH FAIRFAX DRIVE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
1225 EYE STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	98.10%
Initial Cost, Land	$ 21,959
Initial Cost, Buildings and Improvements	47,602
Initial Cost, Total	69,561
Costs Capitalized Subsequent to Acquisition	9,900
Gross Amount at Which Carried, Land	21,959
Gross Amount at Which Carried, Buildings and Improvements	57,502
Gross Amount at Which Carried, Total	79,461
Accumulated Depreciation and Amortization	29,964
Real Estate:
Balance at the end of the year	79,461
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 29,964
1225 EYE STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
1225 EYE STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
1201 EYE STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	98.60%
Initial Cost, Land	$ 31,985
Initial Cost, Buildings and Improvements	63,139
Initial Cost, Total	95,124
Costs Capitalized Subsequent to Acquisition	13,236
Gross Amount at Which Carried, Land	31,985
Gross Amount at Which Carried, Buildings and Improvements	76,375
Gross Amount at Which Carried, Total	108,360
Accumulated Depreciation and Amortization	34,935
Real Estate:
Balance at the end of the year	108,360
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 34,935
1201 EYE STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
1201 EYE STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
60 BROAD STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 32,522
Initial Cost, Buildings and Improvements	168,986
Initial Cost, Total	201,508
Costs Capitalized Subsequent to Acquisition	94,553
Gross Amount at Which Carried, Land	60,708
Gross Amount at Which Carried, Buildings and Improvements	235,353
Gross Amount at Which Carried, Total	296,061
Accumulated Depreciation and Amortization	77,272
Real Estate:
Balance at the end of the year	296,061
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 77,272
60 BROAD STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
60 BROAD STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
3100 CLARENDON BOULEVARD
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 11,700
Initial Cost, Buildings and Improvements	69,705
Initial Cost, Total	81,405
Costs Capitalized Subsequent to Acquisition	52,362
Gross Amount at Which Carried, Land	11,791
Gross Amount at Which Carried, Buildings and Improvements	121,976
Gross Amount at Which Carried, Total	133,767
Accumulated Depreciation and Amortization	48,497
Real Estate:
Balance at the end of the year	133,767
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 48,497
3100 CLARENDON BOULEVARD | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
3100 CLARENDON BOULEVARD | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
LAS COLINAS CORPORATE CENTER I
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 3,912
Initial Cost, Buildings and Improvements	18,830
Initial Cost, Total	22,742
Costs Capitalized Subsequent to Acquisition	(3,056)
Gross Amount at Which Carried, Land	2,543
Gross Amount at Which Carried, Buildings and Improvements	17,143
Gross Amount at Which Carried, Total	19,686
Accumulated Depreciation and Amortization	7,839
Real Estate:
Balance at the end of the year	19,686
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 7,839
LAS COLINAS CORPORATE CENTER I | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
LAS COLINAS CORPORATE CENTER I | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
LAS COLINAS CORPORATE CENTER II
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 4,496
Initial Cost, Buildings and Improvements	29,881
Initial Cost, Total	34,377
Costs Capitalized Subsequent to Acquisition	(826)
Gross Amount at Which Carried, Land	2,543
Gross Amount at Which Carried, Buildings and Improvements	31,008
Gross Amount at Which Carried, Total	33,551
Accumulated Depreciation and Amortization	14,532
Real Estate:
Balance at the end of the year	33,551
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 14,532
LAS COLINAS CORPORATE CENTER II | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
LAS COLINAS CORPORATE CENTER II | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
ONE MERIDIAN CROSSINGS
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 2,919
Initial Cost, Buildings and Improvements	24,398
Initial Cost, Total	27,317
Costs Capitalized Subsequent to Acquisition	931
Gross Amount at Which Carried, Land	2,919
Gross Amount at Which Carried, Buildings and Improvements	25,329
Gross Amount at Which Carried, Total	28,248
Accumulated Depreciation and Amortization	8,620
Real Estate:
Balance at the end of the year	28,248
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 8,620
ONE MERIDIAN CROSSINGS | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
ONE MERIDIAN CROSSINGS | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
TWO MERIDIAN CROSSINGS
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 2,661
Initial Cost, Buildings and Improvements	25,742
Initial Cost, Total	28,403
Costs Capitalized Subsequent to Acquisition	1,027
Gross Amount at Which Carried, Land	2,661
Gross Amount at Which Carried, Buildings and Improvements	26,769
Gross Amount at Which Carried, Total	29,430
Accumulated Depreciation and Amortization	8,903
Real Estate:
Balance at the end of the year	29,430
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 8,903
TWO MERIDIAN CROSSINGS | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
TWO MERIDIAN CROSSINGS | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
THE MEDICI
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 1,780
Initial Cost, Buildings and Improvements	11,510
Initial Cost, Total	13,290
Costs Capitalized Subsequent to Acquisition	5,193
Gross Amount at Which Carried, Land	1,780
Gross Amount at Which Carried, Buildings and Improvements	16,703
Gross Amount at Which Carried, Total	18,483
Accumulated Depreciation and Amortization	7,013
Real Estate:
Balance at the end of the year	18,483
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 7,013
THE MEDICI | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
THE MEDICI | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
400 TOWNPARK
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 2,570
Initial Cost, Buildings and Improvements	20,555
Initial Cost, Total	23,125
Costs Capitalized Subsequent to Acquisition	4,824
Gross Amount at Which Carried, Land	2,570
Gross Amount at Which Carried, Buildings and Improvements	25,379
Gross Amount at Which Carried, Total	27,949
Accumulated Depreciation and Amortization	9,360
Real Estate:
Balance at the end of the year	27,949
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 9,360
400 TOWNPARK | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
400 TOWNPARK | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
ARLINGTON GATEWAY
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 36,930
Initial Cost, Buildings and Improvements	129,070
Initial Cost, Total	166,000
Costs Capitalized Subsequent to Acquisition	3,364
Gross Amount at Which Carried, Land	36,930
Gross Amount at Which Carried, Buildings and Improvements	132,434
Gross Amount at Which Carried, Total	169,364
Accumulated Depreciation and Amortization	36,149
Real Estate:
Balance at the end of the year	169,364
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 36,149
ARLINGTON GATEWAY | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
ARLINGTON GATEWAY | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
5 & 15 WAYSIDE ROAD
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 7,190
Initial Cost, Buildings and Improvements	55,445
Initial Cost, Total	62,635
Costs Capitalized Subsequent to Acquisition	5,772
Gross Amount at Which Carried, Land	7,190
Gross Amount at Which Carried, Buildings and Improvements	61,217
Gross Amount at Which Carried, Total	68,407
Accumulated Depreciation and Amortization	18,590
Real Estate:
Balance at the end of the year	68,407
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 18,590
5 & 15 WAYSIDE ROAD | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
5 & 15 WAYSIDE ROAD | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
6565 MACARTHUR BOULEVARD
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 4,820
Initial Cost, Buildings and Improvements	37,767
Initial Cost, Total	42,587
Costs Capitalized Subsequent to Acquisition	4,480
Gross Amount at Which Carried, Land	4,820
Gross Amount at Which Carried, Buildings and Improvements	42,247
Gross Amount at Which Carried, Total	47,067
Accumulated Depreciation and Amortization	11,623
Real Estate:
Balance at the end of the year	47,067
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 11,623
6565 MACARTHUR BOULEVARD | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
6565 MACARTHUR BOULEVARD | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
ONE LINCOLN PARK
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 6,640
Initial Cost, Buildings and Improvements	44,810
Initial Cost, Total	51,450
Costs Capitalized Subsequent to Acquisition	9,598
Gross Amount at Which Carried, Land	6,640
Gross Amount at Which Carried, Buildings and Improvements	54,408
Gross Amount at Which Carried, Total	61,048
Accumulated Depreciation and Amortization	12,418
Real Estate:
Balance at the end of the year	61,048
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 12,418
ONE LINCOLN PARK | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
ONE LINCOLN PARK | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
161 CORPORATE CENTER
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 2,020
Initial Cost, Buildings and Improvements	10,680
Initial Cost, Total	12,700
Costs Capitalized Subsequent to Acquisition	745
Gross Amount at Which Carried, Land	2,020
Gross Amount at Which Carried, Buildings and Improvements	11,425
Gross Amount at Which Carried, Total	13,445
Accumulated Depreciation and Amortization	2,928
Real Estate:
Balance at the end of the year	13,445
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 2,928
161 CORPORATE CENTER | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
161 CORPORATE CENTER | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
5 WALL STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 9,560
Initial Cost, Buildings and Improvements	50,276
Initial Cost, Total	59,836
Costs Capitalized Subsequent to Acquisition	6,108
Gross Amount at Which Carried, Land	9,560
Gross Amount at Which Carried, Buildings and Improvements	56,384
Gross Amount at Which Carried, Total	65,944
Accumulated Depreciation and Amortization	12,851
Real Estate:
Balance at the end of the year	65,944
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 12,851
5 WALL STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
5 WALL STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
1155 PERIMETER CENTER WEST
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 5,870
Initial Cost, Buildings and Improvements	66,849
Initial Cost, Total	72,719
Costs Capitalized Subsequent to Acquisition	18,665
Gross Amount at Which Carried, Land	5,870
Gross Amount at Which Carried, Buildings and Improvements	85,514
Gross Amount at Which Carried, Total	91,384
Accumulated Depreciation and Amortization	16,629
Real Estate:
Balance at the end of the year	91,384
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 16,629
1155 PERIMETER CENTER WEST | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
1155 PERIMETER CENTER WEST | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
500 TOWNPARK
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 2,147
Initial Cost, Buildings and Improvements	21,925
Initial Cost, Total	24,072
Costs Capitalized Subsequent to Acquisition	5,123
Gross Amount at Which Carried, Land	2,147
Gross Amount at Which Carried, Buildings and Improvements	27,048
Gross Amount at Which Carried, Total	29,195
Accumulated Depreciation and Amortization	5,609
Real Estate:
Balance at the end of the year	29,195
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 5,609
500 TOWNPARK | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
500 TOWNPARK | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
PARK PLACE ON TURTLE CREEK
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 4,470
Initial Cost, Buildings and Improvements	38,048
Initial Cost, Total	42,518
Costs Capitalized Subsequent to Acquisition	7,553
Gross Amount at Which Carried, Land	4,470
Gross Amount at Which Carried, Buildings and Improvements	45,601
Gross Amount at Which Carried, Total	50,071
Accumulated Depreciation and Amortization	10,682
Real Estate:
Balance at the end of the year	50,071
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 10,682
PARK PLACE ON TURTLE CREEK | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
PARK PLACE ON TURTLE CREEK | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
80 CENTRAL STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 1,980
Initial Cost, Buildings and Improvements	8,930
Initial Cost, Total	10,910
Costs Capitalized Subsequent to Acquisition	2,350
Gross Amount at Which Carried, Land	1,980
Gross Amount at Which Carried, Buildings and Improvements	11,280
Gross Amount at Which Carried, Total	13,260
Accumulated Depreciation and Amortization	2,075
Real Estate:
Balance at the end of the year	13,260
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 2,075
80 CENTRAL STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
80 CENTRAL STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
ENCLAVE PLACE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 1,890
Initial Cost, Buildings and Improvements	60,094
Initial Cost, Total	61,984
Costs Capitalized Subsequent to Acquisition	35,319
Gross Amount at Which Carried, Land	1,890
Gross Amount at Which Carried, Buildings and Improvements	95,413
Gross Amount at Which Carried, Total	97,303
Accumulated Depreciation and Amortization	17,620
Real Estate:
Balance at the end of the year	97,303
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 17,620
ENCLAVE PLACE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
ENCLAVE PLACE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
SUNTRUST CENTER
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 11,660
Initial Cost, Buildings and Improvements	139,015
Initial Cost, Total	150,675
Costs Capitalized Subsequent to Acquisition	35,603
Gross Amount at Which Carried, Land	11,660
Gross Amount at Which Carried, Buildings and Improvements	174,618
Gross Amount at Which Carried, Total	186,278
Accumulated Depreciation and Amortization	34,010
Real Estate:
Balance at the end of the year	186,278
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 34,010
SUNTRUST CENTER | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
SUNTRUST CENTER | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
GALLERIA 300
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 4,000
Initial Cost, Buildings and Improvements	73,554
Initial Cost, Total	77,554
Costs Capitalized Subsequent to Acquisition	8,916
Gross Amount at Which Carried, Land	4,000
Gross Amount at Which Carried, Buildings and Improvements	82,470
Gross Amount at Which Carried, Total	86,470
Accumulated Depreciation and Amortization	18,462
Real Estate:
Balance at the end of the year	86,470
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 18,462
GALLERIA 300 | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
GALLERIA 300 | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
GLENRIDGE HIGHLANDS ONE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 5,960
Initial Cost, Buildings and Improvements	50,013
Initial Cost, Total	55,973
Costs Capitalized Subsequent to Acquisition	4,778
Gross Amount at Which Carried, Land	5,960
Gross Amount at Which Carried, Buildings and Improvements	54,791
Gross Amount at Which Carried, Total	60,751
Accumulated Depreciation and Amortization	11,258
Real Estate:
Balance at the end of the year	60,751
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 11,258
GLENRIDGE HIGHLANDS ONE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
GLENRIDGE HIGHLANDS ONE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
CNL CENTER I
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	99.00%
Initial Cost, Land	$ 6,470
Initial Cost, Buildings and Improvements	77,858
Initial Cost, Total	84,328
Costs Capitalized Subsequent to Acquisition	1,191
Gross Amount at Which Carried, Land	6,470
Gross Amount at Which Carried, Buildings and Improvements	79,049
Gross Amount at Which Carried, Total	85,519
Accumulated Depreciation and Amortization	16,141
Real Estate:
Balance at the end of the year	85,519
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 16,141
CNL CENTER I | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
CNL CENTER I | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
CNL CENTER II
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	99.00%
Initial Cost, Land	$ 4,550
Initial Cost, Buildings and Improvements	55,609
Initial Cost, Total	60,159
Costs Capitalized Subsequent to Acquisition	1,748
Gross Amount at Which Carried, Land	4,550
Gross Amount at Which Carried, Buildings and Improvements	57,357
Gross Amount at Which Carried, Total	61,907
Accumulated Depreciation and Amortization	13,095
Real Estate:
Balance at the end of the year	61,907
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 13,095
CNL CENTER II | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
CNL CENTER II | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
ONE WAYSIDE ROAD
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 6,240
Initial Cost, Buildings and Improvements	57,124
Initial Cost, Total	63,364
Costs Capitalized Subsequent to Acquisition	2,029
Gross Amount at Which Carried, Land	6,240
Gross Amount at Which Carried, Buildings and Improvements	59,153
Gross Amount at Which Carried, Total	65,393
Accumulated Depreciation and Amortization	10,909
Real Estate:
Balance at the end of the year	65,393
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 10,909
ONE WAYSIDE ROAD | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
ONE WAYSIDE ROAD | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
GALLERIA 200
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 6,470
Initial Cost, Buildings and Improvements	55,825
Initial Cost, Total	62,295
Costs Capitalized Subsequent to Acquisition	20,446
Gross Amount at Which Carried, Land	6,470
Gross Amount at Which Carried, Buildings and Improvements	76,271
Gross Amount at Which Carried, Total	82,741
Accumulated Depreciation and Amortization	14,027
Real Estate:
Balance at the end of the year	82,741
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 14,027
GALLERIA 200 | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
GALLERIA 200 | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
750 WEST JOHN CARPENTER FREEWAY
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 7,860
Initial Cost, Buildings and Improvements	36,303
Initial Cost, Total	44,163
Costs Capitalized Subsequent to Acquisition	4,017
Gross Amount at Which Carried, Land	7,860
Gross Amount at Which Carried, Buildings and Improvements	40,320
Gross Amount at Which Carried, Total	48,180
Accumulated Depreciation and Amortization	12,350
Real Estate:
Balance at the end of the year	48,180
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 12,350
750 WEST JOHN CARPENTER FREEWAY | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
750 WEST JOHN CARPENTER FREEWAY | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
NORMAN POINTE I
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 4,358
Initial Cost, Buildings and Improvements	22,322
Initial Cost, Total	26,680
Costs Capitalized Subsequent to Acquisition	4,571
Gross Amount at Which Carried, Land	4,361
Gross Amount at Which Carried, Buildings and Improvements	26,890
Gross Amount at Which Carried, Total	31,251
Accumulated Depreciation and Amortization	6,407
Real Estate:
Balance at the end of the year	31,251
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 6,407
NORMAN POINTE I | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
NORMAN POINTE I | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
501 WEST CHURCH STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 2,805
Initial Cost, Buildings and Improvements	28,119
Initial Cost, Total	30,924
Costs Capitalized Subsequent to Acquisition	0
Gross Amount at Which Carried, Land	2,805
Gross Amount at Which Carried, Buildings and Improvements	28,119
Gross Amount at Which Carried, Total	30,924
Accumulated Depreciation and Amortization	5,756
Real Estate:
Balance at the end of the year	30,924
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 5,756
501 WEST CHURCH STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
501 WEST CHURCH STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
9320 Excelsior Boulevard
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 3,760
Initial Cost, Buildings and Improvements	35,289
Initial Cost, Total	39,049
Costs Capitalized Subsequent to Acquisition	(10,553)
Gross Amount at Which Carried, Land	3,707
Gross Amount at Which Carried, Buildings and Improvements	24,789
Gross Amount at Which Carried, Total	28,496
Accumulated Depreciation and Amortization	8,654
Impairment losses		$ 10,000
Real Estate:
Balance at the end of the year	28,496
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 8,654
9320 Excelsior Boulevard | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
9320 Excelsior Boulevard | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
25 BURLINGTON MALL ROAD
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 10,230
Initial Cost, Buildings and Improvements	54,787
Initial Cost, Total	65,017
Costs Capitalized Subsequent to Acquisition	7,314
Gross Amount at Which Carried, Land	10,230
Gross Amount at Which Carried, Buildings and Improvements	62,101
Gross Amount at Which Carried, Total	72,331
Accumulated Depreciation and Amortization	10,554
Real Estate:
Balance at the end of the year	72,331
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 10,554
25 BURLINGTON MALL ROAD | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
25 BURLINGTON MALL ROAD | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
GALLERIA 100
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 7,285
Initial Cost, Buildings and Improvements	72,449
Initial Cost, Total	79,734
Costs Capitalized Subsequent to Acquisition	2,592
Gross Amount at Which Carried, Land	7,285
Gross Amount at Which Carried, Buildings and Improvements	75,041
Gross Amount at Which Carried, Total	82,326
Accumulated Depreciation and Amortization	10,639
Real Estate:
Balance at the end of the year	82,326
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 10,639
GALLERIA 100 | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
GALLERIA 100 | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
GALLERIA 400
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 5,687
Initial Cost, Buildings and Improvements	92,915
Initial Cost, Total	98,602
Costs Capitalized Subsequent to Acquisition	222
Gross Amount at Which Carried, Land	5,687
Gross Amount at Which Carried, Buildings and Improvements	93,137
Gross Amount at Which Carried, Total	98,824
Accumulated Depreciation and Amortization	9,999
Real Estate:
Balance at the end of the year	98,824
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 9,999
GALLERIA 400 | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
GALLERIA 400 | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
GALLERIA 600
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 5,418
Initial Cost, Buildings and Improvements	81,003
Initial Cost, Total	86,421
Costs Capitalized Subsequent to Acquisition	5,281
Gross Amount at Which Carried, Land	5,418
Gross Amount at Which Carried, Buildings and Improvements	86,284
Gross Amount at Which Carried, Total	91,702
Accumulated Depreciation and Amortization	8,144
Real Estate:
Balance at the end of the year	91,702
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 8,144
GALLERIA 600 | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
GALLERIA 600 | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
ONE GALLERIA TOWER
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 5,286
Initial Cost, Buildings and Improvements	107,767
Initial Cost, Total	113,053
Costs Capitalized Subsequent to Acquisition	11,985
Gross Amount at Which Carried, Land	5,286
Gross Amount at Which Carried, Buildings and Improvements	119,752
Gross Amount at Which Carried, Total	125,038
Accumulated Depreciation and Amortization	17,500
Real Estate:
Balance at the end of the year	125,038
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 17,500
ONE GALLERIA TOWER | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
ONE GALLERIA TOWER | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
TWO GALLERIA TOWER
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 3,835
Initial Cost, Buildings and Improvements	109,605
Initial Cost, Total	113,440
Costs Capitalized Subsequent to Acquisition	5,330
Gross Amount at Which Carried, Land	3,836
Gross Amount at Which Carried, Buildings and Improvements	114,934
Gross Amount at Which Carried, Total	118,770
Accumulated Depreciation and Amortization	16,309
Real Estate:
Balance at the end of the year	118,770
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 16,309
TWO GALLERIA TOWER | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
TWO GALLERIA TOWER | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
THREE GALLERIA TOWER
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 6,541
Initial Cost, Buildings and Improvements	125,490
Initial Cost, Total	132,031
Costs Capitalized Subsequent to Acquisition	9,141
Gross Amount at Which Carried, Land	6,541
Gross Amount at Which Carried, Buildings and Improvements	134,631
Gross Amount at Which Carried, Total	141,172
Accumulated Depreciation and Amortization	17,539
Real Estate:
Balance at the end of the year	141,172
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 17,539
THREE GALLERIA TOWER | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
THREE GALLERIA TOWER | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
222 SOUTH ORANGE AVENUE
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 1,899
Initial Cost, Buildings and Improvements	18,417
Initial Cost, Total	20,316
Costs Capitalized Subsequent to Acquisition	3,534
Gross Amount at Which Carried, Land	1,899
Gross Amount at Which Carried, Buildings and Improvements	21,951
Gross Amount at Which Carried, Total	23,850
Accumulated Depreciation and Amortization	57
Real Estate:
Balance at the end of the year	23,850
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 57
222 SOUTH ORANGE AVENUE | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
222 SOUTH ORANGE AVENUE | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
999 PEACHTREE STREET
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 49,067
Initial Cost, Buildings and Improvements	156,109
Initial Cost, Total	205,176
Costs Capitalized Subsequent to Acquisition	6,422
Gross Amount at Which Carried, Land	49,067
Gross Amount at Which Carried, Buildings and Improvements	162,531
Gross Amount at Which Carried, Total	211,598
Accumulated Depreciation and Amortization	13,123
Real Estate:
Balance at the end of the year	211,598
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 13,123
999 PEACHTREE STREET | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
999 PEACHTREE STREET | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
1180 Peachtree Street
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 56,932
Initial Cost, Buildings and Improvements	389,654
Initial Cost, Total	446,586
Costs Capitalized Subsequent to Acquisition	(2)
Gross Amount at Which Carried, Land	56,932
Gross Amount at Which Carried, Buildings and Improvements	389,652
Gross Amount at Which Carried, Total	446,584
Accumulated Depreciation and Amortization	7,524
Real Estate:
Balance at the end of the year	446,584
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 7,524
1180 Peachtree Street | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	0 years
1180 Peachtree Street | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	40 years
UNDEVELOPED LAND PARCELS
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	100.00%
Initial Cost, Land	$ 48,667
Initial Cost, Buildings and Improvements	0
Initial Cost, Total	48,667
Costs Capitalized Subsequent to Acquisition	3,457
Gross Amount at Which Carried, Land	45,782
Gross Amount at Which Carried, Buildings and Improvements	6,342
Gross Amount at Which Carried, Total	52,124
Accumulated Depreciation and Amortization	139
Real Estate:
Balance at the end of the year	52,124
Accumulated Depreciation and Amortization:
Balance at the end of the year	$ 139