Schedule III - Real Estate and Accumulated Depreciation (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2016 USD ($)		Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($)		Nov. 30, 2016 a	Dec. 31, 2015 USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land						$ 634,231
Initial Cost, Buildings and Improvements						3,803,508
Initial Cost, Total	[1]					4,437,739
Costs Capitalized Subsequent to Acquisition	[2]					362,286
Gross Amount at Which Carried, Land						671,896
Gross Amount at Which Carried, Buildings and Improvements						4,128,129
Gross Amount at Which Carried, Total		$ 4,725,096		$ 5,267,615	$ 5,038,005	4,800,025	[3]		$ 4,725,096
Accumulated Depreciation and Amortization		1,019,663		1,182,556	1,060,885	1,058,704			1,019,663
Tax basis of total assets						4,300,000	[3]		$ 4,200,000
Real Estate:
Balance at the beginning of the year		4,725,096		5,267,615	5,038,005
Additions to/improvements of real estate		422,908		452,106	316,991
Assets disposed		(296,319)		(926,592)	(71,627)
Assets impaired	[4]	(30,898)		(40,169)	0
Write-offs of intangible assets	[5]	(11,896)		(7,768)	(9,723)
Write-offs of fully depreciated/amortized assets		(8,866)		(20,096)	(6,031)
Balance at the end of the year		4,800,025	[3]	4,725,096	5,267,615
Accumulated Depreciation and Amortization:
Balance at the beginning of the year		1,019,663		1,182,556	1,060,885
Depreciation and amortization expense		155,274		155,009	156,808
Assets disposed		(95,471)		(290,038)	(19,383)
Write-offs of intangible assets	[5]	(11,896)		(7,768)	(9,723)
Write-offs of fully depreciated/amortized assets		(8,866)		(20,096)	(6,031)
Balance at the end of the year		1,058,704		$ 1,019,663	$ 1,182,556
750 W. JOHN CARPENTER FREEWAY [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of acres of adjacent land purchased | a								3.5
Purchase price of adjoining, developable land		$ 1,000
1225 Eye Street N.W. Associates, LLC [Member]
Real Estate and Accumulated Depreciation [Line Items]
Piedmont’s % Ownership of Entity		49.50%
1201 Eye Street N.W. Associates, LLC [Member]
Real Estate and Accumulated Depreciation [Line Items]
Piedmont’s % Ownership of Entity		49.50%
1225 Equity LLC [Member] | 1225 Eye Street N.W. Associates, LLC [Member]
Real Estate and Accumulated Depreciation [Line Items]
Piedmont’s % Ownership of Entity		49.50%
1201 Equity LLC [Member] | 1201 Eye Street N.W. Associates, LLC [Member]
Real Estate and Accumulated Depreciation [Line Items]
Piedmont’s % Ownership of Entity		49.50%
Building [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life		40 years
Wholly Owned Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land						632,277
Initial Cost, Buildings and Improvements						3,792,292
Initial Cost, Total	[1]					4,424,569
Costs Capitalized Subsequent to Acquisition	[2]					360,848
Gross Amount at Which Carried, Land						669,848
Gross Amount at Which Carried, Buildings and Improvements						4,115,569
Gross Amount at Which Carried, Total	[3]	$ 4,785,417				4,785,417
Accumulated Depreciation and Amortization		1,053,725				1,053,725
Real Estate:
Balance at the end of the year	[3]	4,785,417
Accumulated Depreciation and Amortization:
Balance at the end of the year		1,053,725
Partially Owned Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost, Land						1,954
Initial Cost, Buildings and Improvements						11,216
Initial Cost, Total	[1]					13,170
Costs Capitalized Subsequent to Acquisition	[2]					1,438
Gross Amount at Which Carried, Land						2,048
Gross Amount at Which Carried, Buildings and Improvements						12,560
Gross Amount at Which Carried, Total	[3]	14,608				14,608
Accumulated Depreciation and Amortization		4,979				$ 4,979
Real Estate:
Balance at the end of the year	[3]	14,608
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,979
Minimum [Member] | Building Improvements [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life		5 years
Minimum [Member] | Land Improvements [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life		20 years
Maximum [Member] | Building Improvements [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life		25 years
Maximum [Member] | Land Improvements [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life		25 years
1430 ENCLAVE PARKWAY [Member]
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	[1]					45,015
Costs Capitalized Subsequent to Acquisition	[2]					2,050
Gross Amount at Which Carried, Land						5,506
Gross Amount at Which Carried, Buildings and Improvements						41,559
Gross Amount at Which Carried, Total	[3]	$ 47,065				47,065
Accumulated Depreciation and Amortization		18,517				$ 18,517
Real Estate:
Balance at the end of the year	[3]	47,065
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 18,517
1430 ENCLAVE PARKWAY [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
1430 ENCLAVE PARKWAY [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
CRESCENT RIDGE II [Member]
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	[1]					52,854
Costs Capitalized Subsequent to Acquisition	[2]					7,651
Gross Amount at Which Carried, Land						8,021
Gross Amount at Which Carried, Buildings and Improvements						52,484
Gross Amount at Which Carried, Total	[3]	$ 60,505				60,505
Accumulated Depreciation and Amortization		22,236				$ 22,236
Real Estate:
Balance at the end of the year	[3]	60,505
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 22,236
CRESCENT RIDGE II [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
CRESCENT RIDGE II [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
1200 CROWN COLONY DRIVE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 11,042
Initial Cost, Buildings and Improvements						40,666
Initial Cost, Total	[1]					51,708
Costs Capitalized Subsequent to Acquisition	[2]					3,506
Gross Amount at Which Carried, Land						11,042
Gross Amount at Which Carried, Buildings and Improvements						44,172
Gross Amount at Which Carried, Total	[3]	$ 55,214				55,214
Accumulated Depreciation and Amortization		18,445				$ 18,445
Real Estate:
Balance at the end of the year	[3]	55,214
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 18,445
1200 CROWN COLONY DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
1200 CROWN COLONY DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
5601 HIATUS ROAD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 3,642
Initial Cost, Buildings and Improvements						10,404
Initial Cost, Total	[1]					14,046
Costs Capitalized Subsequent to Acquisition	[2]					1,721
Gross Amount at Which Carried, Land						3,642
Gross Amount at Which Carried, Buildings and Improvements						12,125
Gross Amount at Which Carried, Total	[3]	$ 15,767				15,767
Accumulated Depreciation and Amortization		5,691				$ 5,691
Real Estate:
Balance at the end of the year	[3]	15,767
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 5,691
5601 HIATUS ROAD [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
5601 HIATUS ROAD [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
WINDY POINT I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 4,537
Initial Cost, Buildings and Improvements						31,847
Initial Cost, Total	[1]					36,384
Costs Capitalized Subsequent to Acquisition	[2]					2,071
Gross Amount at Which Carried, Land						4,537
Gross Amount at Which Carried, Buildings and Improvements						33,918
Gross Amount at Which Carried, Total	[3]	$ 38,455				38,455
Accumulated Depreciation and Amortization		13,116				$ 13,116
Real Estate:
Balance at the end of the year	[3]	38,455
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 13,116
WINDY POINT I [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
WINDY POINT I [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
WINDY POINT II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 3,746
Initial Cost, Buildings and Improvements						55,026
Initial Cost, Total	[1]					58,772
Costs Capitalized Subsequent to Acquisition	[2]					16,696
Gross Amount at Which Carried, Land						3,746
Gross Amount at Which Carried, Buildings and Improvements						71,722
Gross Amount at Which Carried, Total	[3]	$ 75,468				75,468
Accumulated Depreciation and Amortization		26,654				$ 26,654
Real Estate:
Balance at the end of the year	[3]	75,468
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 26,654
WINDY POINT II [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
WINDY POINT II [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
SARASOTA COMMERCE CENTER II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 1,767
Initial Cost, Buildings and Improvements						20,533
Initial Cost, Total	[1]					22,300
Costs Capitalized Subsequent to Acquisition	[2]					2,730
Gross Amount at Which Carried, Land						2,203
Gross Amount at Which Carried, Buildings and Improvements						22,827
Gross Amount at Which Carried, Total	[3]	$ 25,030				25,030
Accumulated Depreciation and Amortization		9,652				$ 9,652
Real Estate:
Balance at the end of the year	[3]	25,030
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 9,652
SARASOTA COMMERCE CENTER II [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
SARASOTA COMMERCE CENTER II [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
2001 NW 64TH STREET [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	[7]					100.00%
Initial Cost, Land	[7]					$ 0
Initial Cost, Buildings and Improvements	[7]					7,172
Initial Cost, Total	[1],[7]					7,172
Costs Capitalized Subsequent to Acquisition	[2],[7]					966
Gross Amount at Which Carried, Land	[7]					0
Gross Amount at Which Carried, Buildings and Improvements	[7]					8,138
Gross Amount at Which Carried, Total	[3],[7]	$ 8,138				8,138
Accumulated Depreciation and Amortization	[7]	3,428				$ 3,428
Real Estate:
Balance at the end of the year	[3],[7]	8,138
Accumulated Depreciation and Amortization:
Balance at the end of the year	[7]	$ 3,428
2001 NW 64TH STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[7]	0 years
2001 NW 64TH STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[7]	40 years
90 CENTRAL STREET [Member]
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	[1]					33,139
Costs Capitalized Subsequent to Acquisition	[2]					3,070
Gross Amount at Which Carried, Land						3,642
Gross Amount at Which Carried, Buildings and Improvements						32,567
Gross Amount at Which Carried, Total	[3]	$ 36,209				36,209
Accumulated Depreciation and Amortization		13,092				$ 13,092
Real Estate:
Balance at the end of the year	[3]	36,209
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 13,092
90 CENTRAL STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
90 CENTRAL STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
DESERT CANYON 300 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 2,602
Initial Cost, Buildings and Improvements						24,333
Initial Cost, Total	[1]					26,935
Costs Capitalized Subsequent to Acquisition	[2]					45
Gross Amount at Which Carried, Land						2,602
Gross Amount at Which Carried, Buildings and Improvements						24,378
Gross Amount at Which Carried, Total	[3]	$ 26,980				26,980
Accumulated Depreciation and Amortization		9,289				$ 9,289
Real Estate:
Balance at the end of the year	[3]	26,980
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 9,289
DESERT CANYON 300 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
DESERT CANYON 300 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
6031 CONNECTION DRIVE [Member]
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	[1]					46,813
Costs Capitalized Subsequent to Acquisition	[2]					4,305
Gross Amount at Which Carried, Land						3,157
Gross Amount at Which Carried, Buildings and Improvements						47,961
Gross Amount at Which Carried, Total	[3]	$ 51,118				51,118
Accumulated Depreciation and Amortization		18,841				$ 18,841
Real Estate:
Balance at the end of the year	[3]	51,118
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 18,841
6031 CONNECTION DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
6031 CONNECTION DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
6021 CONNECTION DRIVE [Member]
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	[1]					45,819
Costs Capitalized Subsequent to Acquisition	[2]					10,541
Gross Amount at Which Carried, Land						3,157
Gross Amount at Which Carried, Buildings and Improvements						53,203
Gross Amount at Which Carried, Total	[3]	$ 56,360				56,360
Accumulated Depreciation and Amortization		18,207				$ 18,207
Real Estate:
Balance at the end of the year	[3]	56,360
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 18,207
6021 CONNECTION DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
6021 CONNECTION DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
6011 CONNECTION DRIVE [Member]
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	[1]					32,191
Costs Capitalized Subsequent to Acquisition	[2]					2,597
Gross Amount at Which Carried, Land						3,157
Gross Amount at Which Carried, Buildings and Improvements						31,631
Gross Amount at Which Carried, Total	[3]	$ 34,788				34,788
Accumulated Depreciation and Amortization		13,167				$ 13,167
Real Estate:
Balance at the end of the year	[3]	34,788
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 13,167
6011 CONNECTION DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
6011 CONNECTION DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
TWO INDEPENDENCE SQUARE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 52,711
Initial Cost, Buildings and Improvements						202,702
Initial Cost, Total	[1]					255,413
Costs Capitalized Subsequent to Acquisition	[2]					58,844
Gross Amount at Which Carried, Land						52,711
Gross Amount at Which Carried, Buildings and Improvements						261,546
Gross Amount at Which Carried, Total	[3]	$ 314,257				314,257
Accumulated Depreciation and Amortization		88,319				$ 88,319
Real Estate:
Balance at the end of the year	[3]	314,257
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 88,319
TWO INDEPENDENCE SQUARE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
TWO INDEPENDENCE SQUARE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
ONE INDEPENDENCE SQUARE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 29,765
Initial Cost, Buildings and Improvements						104,814
Initial Cost, Total	[1]					134,579
Costs Capitalized Subsequent to Acquisition	[2]					24,250
Gross Amount at Which Carried, Land						30,562
Gross Amount at Which Carried, Buildings and Improvements						128,267
Gross Amount at Which Carried, Total	[3]	$ 158,829				158,829
Accumulated Depreciation and Amortization		40,467				$ 40,467
Real Estate:
Balance at the end of the year	[3]	158,829
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 40,467
ONE INDEPENDENCE SQUARE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
ONE INDEPENDENCE SQUARE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
2120 WEST END AVENUE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 4,908
Initial Cost, Buildings and Improvements						59,011
Initial Cost, Total	[1]					63,919
Costs Capitalized Subsequent to Acquisition	[2]					6,671
Gross Amount at Which Carried, Land						5,101
Gross Amount at Which Carried, Buildings and Improvements						65,489
Gross Amount at Which Carried, Total	[3]	$ 70,590				70,590
Accumulated Depreciation and Amortization		25,014				$ 25,014
Real Estate:
Balance at the end of the year	[3]	70,590
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 25,014
2120 WEST END AVENUE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
2120 WEST END AVENUE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
800 NORTH BRAND BOULEVARD [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 23,605
Initial Cost, Buildings and Improvements						136,284
Initial Cost, Total	[1]					159,889
Costs Capitalized Subsequent to Acquisition	[2]					12,937
Gross Amount at Which Carried, Land						23,607
Gross Amount at Which Carried, Buildings and Improvements						149,219
Gross Amount at Which Carried, Total	[3]	$ 172,826				172,826
Accumulated Depreciation and Amortization		52,172				$ 52,172
Real Estate:
Balance at the end of the year	[3]	172,826
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 52,172
800 NORTH BRAND BOULEVARD [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
800 NORTH BRAND BOULEVARD [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
US BANCORP CENTER [Member]
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	[1]					186,767
Costs Capitalized Subsequent to Acquisition	[2]					17,422
Gross Amount at Which Carried, Land						11,138
Gross Amount at Which Carried, Buildings and Improvements						193,051
Gross Amount at Which Carried, Total	[3]	$ 204,189				204,189
Accumulated Depreciation and Amortization		65,628				$ 65,628
Real Estate:
Balance at the end of the year	[3]	204,189
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 65,628
US BANCORP CENTER [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
US BANCORP CENTER [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
AUBURN HILLS CORPORATE CENTER [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 1,978
Initial Cost, Buildings and Improvements						16,570
Initial Cost, Total	[1]					18,548
Costs Capitalized Subsequent to Acquisition	[2]					(8,081)
Gross Amount at Which Carried, Land						1,591
Gross Amount at Which Carried, Buildings and Improvements						8,876
Gross Amount at Which Carried, Total	[3]	$ 10,467				10,467
Accumulated Depreciation and Amortization		4,292				$ 4,292
Real Estate:
Balance at the end of the year	[3]	10,467
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,292
AUBURN HILLS CORPORATE CENTER [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
AUBURN HILLS CORPORATE CENTER [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
GLENRIDGE HIGHLANDS TWO [Member]
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	[1]					75,693
Costs Capitalized Subsequent to Acquisition	[2]					(17,857)
Gross Amount at Which Carried, Land						6,662
Gross Amount at Which Carried, Buildings and Improvements						51,174
Gross Amount at Which Carried, Total	[3]	$ 57,836				57,836
Accumulated Depreciation and Amortization		19,919				$ 19,919
Real Estate:
Balance at the end of the year	[3]	57,836
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 19,919
GLENRIDGE HIGHLANDS TWO [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
GLENRIDGE HIGHLANDS TWO [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
200 BRIDGEWATER CROSSING [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 8,182
Initial Cost, Buildings and Improvements						84,160
Initial Cost, Total	[1]					92,342
Costs Capitalized Subsequent to Acquisition	[2]					(11,740)
Gross Amount at Which Carried, Land						8,328
Gross Amount at Which Carried, Buildings and Improvements						72,274
Gross Amount at Which Carried, Total	[3]	$ 80,602				80,602
Accumulated Depreciation and Amortization		25,815				$ 25,815
Real Estate:
Balance at the end of the year	[3]	80,602
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 25,815
200 BRIDGEWATER CROSSING [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
200 BRIDGEWATER CROSSING [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
400 VIRGINIA AVE [Member]
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	[1]					71,886
Costs Capitalized Subsequent to Acquisition	[2]					(792)
Gross Amount at Which Carried, Land						22,146
Gross Amount at Which Carried, Buildings and Improvements						48,948
Gross Amount at Which Carried, Total	[3]	$ 71,094				71,094
Accumulated Depreciation and Amortization		17,279				$ 17,279
Real Estate:
Balance at the end of the year	[3]	71,094
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 17,279
400 VIRGINIA AVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
400 VIRGINIA AVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
4250 NORTH FAIRFAX DRIVE [Member]
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	[1]					84,554
Costs Capitalized Subsequent to Acquisition	[2]					4,240
Gross Amount at Which Carried, Land						13,636
Gross Amount at Which Carried, Buildings and Improvements						75,158
Gross Amount at Which Carried, Total	[3]	$ 88,794				88,794
Accumulated Depreciation and Amortization		24,989				$ 24,989
Real Estate:
Balance at the end of the year	[3]	88,794
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 24,989
4250 NORTH FAIRFAX DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
4250 NORTH FAIRFAX DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
1225 EYE STREET [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	[8]					49.50%
Encumbrances	[8]					$ 57,600
Initial Cost, Land	[8]					21,959
Initial Cost, Buildings and Improvements	[8]					47,602
Initial Cost, Total	[1],[8]					69,561
Costs Capitalized Subsequent to Acquisition	[2],[8]					7,565
Gross Amount at Which Carried, Land	[8]					21,959
Gross Amount at Which Carried, Buildings and Improvements	[8]					55,167
Gross Amount at Which Carried, Total	[3],[8]	$ 77,126				77,126
Accumulated Depreciation and Amortization	[8]	17,014				$ 17,014
Real Estate:
Balance at the end of the year	[3],[8]	77,126
Accumulated Depreciation and Amortization:
Balance at the end of the year	[8]	$ 17,014
1225 EYE STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[8]	0 years
1225 EYE STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[8]	40 years
1201 EYE STREET [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	[9]					49.50%
Encumbrances	[9]					$ 82,400
Initial Cost, Land	[9]					31,985
Initial Cost, Buildings and Improvements	[9]					63,139
Initial Cost, Total	[1],[9]					95,124
Costs Capitalized Subsequent to Acquisition	[2],[9]					(55)
Gross Amount at Which Carried, Land	[9]					31,984
Gross Amount at Which Carried, Buildings and Improvements	[9]					63,085
Gross Amount at Which Carried, Total	[3],[9]	$ 95,069				95,069
Accumulated Depreciation and Amortization	[9]	20,043				$ 20,043
Real Estate:
Balance at the end of the year	[3],[9]	95,069
Accumulated Depreciation and Amortization:
Balance at the end of the year	[9]	$ 20,043
1201 EYE STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[9]	0 years
1201 EYE STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[9]	40 years
1901 MARKET STREET [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Encumbrances						$ 160,000
Initial Cost, Land						13,584
Initial Cost, Buildings and Improvements						166,683
Initial Cost, Total	[1]					180,267
Costs Capitalized Subsequent to Acquisition	[2]					53,684
Gross Amount at Which Carried, Land						20,829
Gross Amount at Which Carried, Buildings and Improvements						213,122
Gross Amount at Which Carried, Total	[3]	$ 233,951				233,951
Accumulated Depreciation and Amortization		71,421				$ 71,421
Real Estate:
Balance at the end of the year	[3]	233,951
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 71,421
1901 MARKET STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
1901 MARKET STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
60 BROAD STREET [Member]
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	[1]					201,508
Costs Capitalized Subsequent to Acquisition	[2]					12,390
Gross Amount at Which Carried, Land						60,708
Gross Amount at Which Carried, Buildings and Improvements						153,190
Gross Amount at Which Carried, Total	[3]	$ 213,898				213,898
Accumulated Depreciation and Amortization		51,381				$ 51,381
Real Estate:
Balance at the end of the year	[3]	213,898
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 51,381
60 BROAD STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
60 BROAD STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
1414 MASSACHUSETTS AVENUE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 4,210
Initial Cost, Buildings and Improvements						35,821
Initial Cost, Total	[1]					40,031
Costs Capitalized Subsequent to Acquisition	[2]					(284)
Gross Amount at Which Carried, Land						4,365
Gross Amount at Which Carried, Buildings and Improvements						35,382
Gross Amount at Which Carried, Total	[3]	$ 39,747				39,747
Accumulated Depreciation and Amortization		16,045				$ 16,045
Real Estate:
Balance at the end of the year	[3]	39,747
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 16,045
1414 MASSACHUSETTS AVENUE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
1414 MASSACHUSETTS AVENUE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
ONE BRATTLE SQUARE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 6,974
Initial Cost, Buildings and Improvements						64,940
Initial Cost, Total	[1]					71,914
Costs Capitalized Subsequent to Acquisition	[2]					(2,976)
Gross Amount at Which Carried, Land						7,113
Gross Amount at Which Carried, Buildings and Improvements						61,825
Gross Amount at Which Carried, Total	[3]	$ 68,938				68,938
Accumulated Depreciation and Amortization		34,237				$ 34,237
Real Estate:
Balance at the end of the year	[3]	68,938
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 34,237
ONE BRATTLE SQUARE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
ONE BRATTLE SQUARE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
600 CORPORATE DRIVE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 3,934
Initial Cost, Buildings and Improvements						0
Initial Cost, Total	[1]					3,934
Costs Capitalized Subsequent to Acquisition	[2]					16,281
Gross Amount at Which Carried, Land						3,934
Gross Amount at Which Carried, Buildings and Improvements						16,281
Gross Amount at Which Carried, Total	[3]	$ 20,215				20,215
Accumulated Depreciation and Amortization		6,969				$ 6,969
Real Estate:
Balance at the end of the year	[3]	20,215
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 6,969
600 CORPORATE DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
600 CORPORATE DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
1075 WEST ENTRANCE DRIVE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 5,200
Initial Cost, Buildings and Improvements						22,957
Initial Cost, Total	[1]					28,157
Costs Capitalized Subsequent to Acquisition	[2]					(313)
Gross Amount at Which Carried, Land						5,207
Gross Amount at Which Carried, Buildings and Improvements						22,637
Gross Amount at Which Carried, Total	[3]	$ 27,844				27,844
Accumulated Depreciation and Amortization		8,128				$ 8,128
Real Estate:
Balance at the end of the year	[3]	27,844
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 8,128
1075 WEST ENTRANCE DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
1075 WEST ENTRANCE DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
3100 CLARENDON BOULEVARD [Member]
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	[1]					81,405
Costs Capitalized Subsequent to Acquisition	[2]					38,680
Gross Amount at Which Carried, Land						11,791
Gross Amount at Which Carried, Buildings and Improvements						108,294
Gross Amount at Which Carried, Total	[3]	$ 120,085				120,085
Accumulated Depreciation and Amortization		21,673				$ 21,673
Real Estate:
Balance at the end of the year	[3]	120,085
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 21,673
3100 CLARENDON BOULEVARD [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
3100 CLARENDON BOULEVARD [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
400 BRIDGEWATER CROSSING [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 10,400
Initial Cost, Buildings and Improvements						71,052
Initial Cost, Total	[1]					81,452
Costs Capitalized Subsequent to Acquisition	[2]					(15,626)
Gross Amount at Which Carried, Land						10,400
Gross Amount at Which Carried, Buildings and Improvements						55,426
Gross Amount at Which Carried, Total	[3]	$ 65,826				65,826
Accumulated Depreciation and Amortization		16,329				$ 16,329
Real Estate:
Balance at the end of the year	[3]	65,826
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 16,329
400 BRIDGEWATER CROSSING [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
400 BRIDGEWATER CROSSING [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
LAS COLINAS CORPORATE CENTER I [Member]
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	[1]					22,742
Costs Capitalized Subsequent to Acquisition	[2]					(3,667)
Gross Amount at Which Carried, Land						2,543
Gross Amount at Which Carried, Buildings and Improvements						16,532
Gross Amount at Which Carried, Total	[3]	$ 19,075				19,075
Accumulated Depreciation and Amortization		5,065				$ 5,065
Real Estate:
Balance at the end of the year	[3]	19,075
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 5,065
LAS COLINAS CORPORATE CENTER I [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
LAS COLINAS CORPORATE CENTER I [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
LAS COLINAS CORPORATE CENTER II [Member]
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	[1]					34,377
Costs Capitalized Subsequent to Acquisition	[2]					(3,624)
Gross Amount at Which Carried, Land						2,543
Gross Amount at Which Carried, Buildings and Improvements						28,210
Gross Amount at Which Carried, Total	[3]	$ 30,753				30,753
Accumulated Depreciation and Amortization		8,536				$ 8,536
Real Estate:
Balance at the end of the year	[3]	30,753
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 8,536
LAS COLINAS CORPORATE CENTER II [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
LAS COLINAS CORPORATE CENTER II [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
TWO PIERCE PLACE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 4,370
Initial Cost, Buildings and Improvements						70,632
Initial Cost, Total	[1]					75,002
Costs Capitalized Subsequent to Acquisition	[2]					10,640
Gross Amount at Which Carried, Land						8,156
Gross Amount at Which Carried, Buildings and Improvements						77,486
Gross Amount at Which Carried, Total	[3]	$ 85,642				85,642
Accumulated Depreciation and Amortization		28,680				$ 28,680
Real Estate:
Balance at the end of the year	[3]	85,642
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 28,680
TWO PIERCE PLACE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
TWO PIERCE PLACE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
2300 CABOT DRIVE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 4,390
Initial Cost, Buildings and Improvements						19,549
Initial Cost, Total	[1]					23,939
Costs Capitalized Subsequent to Acquisition	[2]					(4,073)
Gross Amount at Which Carried, Land						4,390
Gross Amount at Which Carried, Buildings and Improvements						15,476
Gross Amount at Which Carried, Total	[3]	$ 19,866				19,866
Accumulated Depreciation and Amortization		4,054				$ 4,054
Real Estate:
Balance at the end of the year	[3]	19,866
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,054
2300 CABOT DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
2300 CABOT DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
PIEDMONT POINTE I [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 11,200
Initial Cost, Buildings and Improvements						58,606
Initial Cost, Total	[1]					69,806
Costs Capitalized Subsequent to Acquisition	[2]					7,371
Gross Amount at Which Carried, Land						11,200
Gross Amount at Which Carried, Buildings and Improvements						65,977
Gross Amount at Which Carried, Total	[3]	$ 77,177				77,177
Accumulated Depreciation and Amortization		17,043				$ 17,043
Real Estate:
Balance at the end of the year	[3]	77,177
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 17,043
PIEDMONT POINTE I [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
PIEDMONT POINTE I [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
PIEDMONT POINTE II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 13,300
Initial Cost, Buildings and Improvements						70,618
Initial Cost, Total	[1]					83,918
Costs Capitalized Subsequent to Acquisition	[2]					8,115
Gross Amount at Which Carried, Land						13,300
Gross Amount at Which Carried, Buildings and Improvements						78,733
Gross Amount at Which Carried, Total	[3]	$ 92,033				92,033
Accumulated Depreciation and Amortization		18,682				$ 18,682
Real Estate:
Balance at the end of the year	[3]	92,033
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 18,682
PIEDMONT POINTE II [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
PIEDMONT POINTE II [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
SUWANEE GATEWAY ONE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 1,000
Initial Cost, Buildings and Improvements						6,875
Initial Cost, Total	[1]					7,875
Costs Capitalized Subsequent to Acquisition	[2]					3,159
Gross Amount at Which Carried, Land						2,401
Gross Amount at Which Carried, Buildings and Improvements						8,633
Gross Amount at Which Carried, Total	[3]	$ 11,034				11,034
Accumulated Depreciation and Amortization		1,533				$ 1,533
Real Estate:
Balance at the end of the year	[3]	11,034
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 1,533
SUWANEE GATEWAY ONE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
SUWANEE GATEWAY ONE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
ONE MERIDIAN CROSSINGS [Member]
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	[1]					27,317
Costs Capitalized Subsequent to Acquisition	[2]					318
Gross Amount at Which Carried, Land						2,919
Gross Amount at Which Carried, Buildings and Improvements						24,716
Gross Amount at Which Carried, Total	[3]	$ 27,635				27,635
Accumulated Depreciation and Amortization		4,340				$ 4,340
Real Estate:
Balance at the end of the year	[3]	27,635
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,340
ONE MERIDIAN CROSSINGS [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
ONE MERIDIAN CROSSINGS [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
TWO MERIDIAN CROSSINGS [Member]
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	[1]					28,403
Costs Capitalized Subsequent to Acquisition	[2]					590
Gross Amount at Which Carried, Land						2,661
Gross Amount at Which Carried, Buildings and Improvements						26,332
Gross Amount at Which Carried, Total	[3]	$ 28,993				28,993
Accumulated Depreciation and Amortization		4,592				$ 4,592
Real Estate:
Balance at the end of the year	[3]	28,993
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,592
TWO MERIDIAN CROSSINGS [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
TWO MERIDIAN CROSSINGS [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
500 WEST MONROE STREET [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 36,990
Initial Cost, Buildings and Improvements						185,113
Initial Cost, Total	[1]					222,103
Costs Capitalized Subsequent to Acquisition	[2]					42,561
Gross Amount at Which Carried, Land						36,990
Gross Amount at Which Carried, Buildings and Improvements						227,674
Gross Amount at Which Carried, Total	[3]	$ 264,664				264,664
Accumulated Depreciation and Amortization		35,293				$ 35,293
Real Estate:
Balance at the end of the year	[3]	264,664
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 35,293
500 WEST MONROE STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
500 WEST MONROE STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
THE DUPREE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 4,080
Initial Cost, Buildings and Improvements						14,310
Initial Cost, Total	[1]					18,390
Costs Capitalized Subsequent to Acquisition	[2]					877
Gross Amount at Which Carried, Land						4,080
Gross Amount at Which Carried, Buildings and Improvements						15,187
Gross Amount at Which Carried, Total	[3]	$ 19,267				19,267
Accumulated Depreciation and Amortization		3,814				$ 3,814
Real Estate:
Balance at the end of the year	[3]	19,267
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 3,814
THE DUPREE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
THE DUPREE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
THE MEDICI [Member]
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	[1]					13,290
Costs Capitalized Subsequent to Acquisition	[2]					4,988
Gross Amount at Which Carried, Land						1,780
Gross Amount at Which Carried, Buildings and Improvements						16,498
Gross Amount at Which Carried, Total	[3]	$ 18,278				18,278
Accumulated Depreciation and Amortization		2,873				$ 2,873
Real Estate:
Balance at the end of the year	[3]	18,278
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 2,873
THE MEDICI [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
THE MEDICI [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
225 PRESIDENTIAL WAY [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 3,626
Initial Cost, Buildings and Improvements						36,916
Initial Cost, Total	[1]					40,542
Costs Capitalized Subsequent to Acquisition	[2]					(764)
Gross Amount at Which Carried, Land						3,612
Gross Amount at Which Carried, Buildings and Improvements						36,166
Gross Amount at Which Carried, Total	[3]	$ 39,778				39,778
Accumulated Depreciation and Amortization		8,150				$ 8,150
Real Estate:
Balance at the end of the year	[3]	39,778
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 8,150
225 PRESIDENTIAL WAY [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
225 PRESIDENTIAL WAY [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
235 PRESIDENTIAL WAY [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 4,154
Initial Cost, Buildings and Improvements						44,048
Initial Cost, Total	[1]					48,202
Costs Capitalized Subsequent to Acquisition	[2]					(911)
Gross Amount at Which Carried, Land						4,138
Gross Amount at Which Carried, Buildings and Improvements						43,153
Gross Amount at Which Carried, Total	[3]	$ 47,291				47,291
Accumulated Depreciation and Amortization		9,686				$ 9,686
Real Estate:
Balance at the end of the year	[3]	47,291
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 9,686
235 PRESIDENTIAL WAY [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
235 PRESIDENTIAL WAY [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
400 TOWNPARK [Member]
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	[1]					23,125
Costs Capitalized Subsequent to Acquisition	[2]					3,555
Gross Amount at Which Carried, Land						2,570
Gross Amount at Which Carried, Buildings and Improvements						24,110
Gross Amount at Which Carried, Total	[3]	$ 26,680				26,680
Accumulated Depreciation and Amortization		4,107				$ 4,107
Real Estate:
Balance at the end of the year	[3]	26,680
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,107
400 TOWNPARK [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
400 TOWNPARK [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
ARLINGTON GATEWAY [Member]
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	[1]					166,000
Costs Capitalized Subsequent to Acquisition	[2]					1,384
Gross Amount at Which Carried, Land						36,930
Gross Amount at Which Carried, Buildings and Improvements						130,454
Gross Amount at Which Carried, Total	[3]	$ 167,384				167,384
Accumulated Depreciation and Amortization		19,186				$ 19,186
Real Estate:
Balance at the end of the year	[3]	167,384
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 19,186
ARLINGTON GATEWAY [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
ARLINGTON GATEWAY [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
5 & 15 WAYSIDE ROAD [Member]
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	[1]					62,635
Costs Capitalized Subsequent to Acquisition	[2]					1,536
Gross Amount at Which Carried, Land						7,190
Gross Amount at Which Carried, Buildings and Improvements						56,981
Gross Amount at Which Carried, Total	[3]	$ 64,171				64,171
Accumulated Depreciation and Amortization		7,917				$ 7,917
Real Estate:
Balance at the end of the year	[3]	64,171
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 7,917
5 & 15 WAYSIDE ROAD [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
5 & 15 WAYSIDE ROAD [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
5301 MARYLAND WAY [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Initial Cost, Land						$ 5,740
Initial Cost, Buildings and Improvements						9,717
Initial Cost, Total	[1]					15,457
Costs Capitalized Subsequent to Acquisition	[2]					(1,768)
Gross Amount at Which Carried, Land						5,740
Gross Amount at Which Carried, Buildings and Improvements						7,949
Gross Amount at Which Carried, Total	[3]	$ 13,689				13,689
Accumulated Depreciation and Amortization		581				$ 581
Real Estate:
Balance at the end of the year	[3]	13,689
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 581
5301 MARYLAND WAY [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
5301 MARYLAND WAY [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
6565 MACARTHUR BLVD [Member]
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	[1]					42,587
Costs Capitalized Subsequent to Acquisition	[2]					512
Gross Amount at Which Carried, Land						4,820
Gross Amount at Which Carried, Buildings and Improvements						38,279
Gross Amount at Which Carried, Total	[3]	$ 43,099				43,099
Accumulated Depreciation and Amortization		5,115				$ 5,115
Real Estate:
Balance at the end of the year	[3]	43,099
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 5,115
6565 MACARTHUR BLVD [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
6565 MACARTHUR BLVD [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
ONE LINCOLN PARK [Member]
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	[1]					51,450
Costs Capitalized Subsequent to Acquisition	[2]					1,383
Gross Amount at Which Carried, Land						6,640
Gross Amount at Which Carried, Buildings and Improvements						46,193
Gross Amount at Which Carried, Total	[3]	$ 52,833				52,833
Accumulated Depreciation and Amortization		5,121				$ 5,121
Real Estate:
Balance at the end of the year	[3]	52,833
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 5,121
ONE LINCOLN PARK [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
ONE LINCOLN PARK [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
161 CORPORATE CENTER [Member]
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	[1]					12,700
Costs Capitalized Subsequent to Acquisition	[2]					130
Gross Amount at Which Carried, Land						2,020
Gross Amount at Which Carried, Buildings and Improvements						10,810
Gross Amount at Which Carried, Total	[3]	$ 12,830				12,830
Accumulated Depreciation and Amortization		1,814				$ 1,814
Real Estate:
Balance at the end of the year	[3]	12,830
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 1,814
161 CORPORATE CENTER [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
161 CORPORATE CENTER [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
5 WALL STREET [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						100.00%
Encumbrances						$ 31,583
Initial Cost, Land						9,560
Initial Cost, Buildings and Improvements						50,276
Initial Cost, Total	[1]					59,836
Costs Capitalized Subsequent to Acquisition	[2]					0
Gross Amount at Which Carried, Land						9,560
Gross Amount at Which Carried, Buildings and Improvements						50,276
Gross Amount at Which Carried, Total	[3]	$ 59,836				59,836
Accumulated Depreciation and Amortization		6,271				$ 6,271
Real Estate:
Balance at the end of the year	[3]	59,836
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 6,271
5 WALL STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
5 WALL STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
1155 PERIMETER CENTER WEST [Member]
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	[1]					72,719
Costs Capitalized Subsequent to Acquisition	[2]					5
Gross Amount at Which Carried, Land						5,870
Gross Amount at Which Carried, Buildings and Improvements						66,854
Gross Amount at Which Carried, Total	[3]	$ 72,724				72,724
Accumulated Depreciation and Amortization		7,039				$ 7,039
Real Estate:
Balance at the end of the year	[3]	72,724
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 7,039
1155 PERIMETER CENTER WEST [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
1155 PERIMETER CENTER WEST [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
PARK PLACE ON TURTLE CREEK [Member]
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	[1]					42,518
Costs Capitalized Subsequent to Acquisition	[2]					1,778
Gross Amount at Which Carried, Land						4,470
Gross Amount at Which Carried, Buildings and Improvements						39,826
Gross Amount at Which Carried, Total	[3]	$ 44,296				44,296
Accumulated Depreciation and Amortization		3,603				$ 3,603
Real Estate:
Balance at the end of the year	[3]	44,296
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 3,603
PARK PLACE ON TURTLE CREEK [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
PARK PLACE ON TURTLE CREEK [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
80 CENTRAL STREET [Member]
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	[1]					10,910
Costs Capitalized Subsequent to Acquisition	[2]					40
Gross Amount at Which Carried, Land						1,980
Gross Amount at Which Carried, Buildings and Improvements						8,970
Gross Amount at Which Carried, Total	[3]	$ 10,950				10,950
Accumulated Depreciation and Amortization		998				$ 998
Real Estate:
Balance at the end of the year	[3]	10,950
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 998
80 CENTRAL STREET [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
80 CENTRAL STREET [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
ENCLAVE PLACE [Member]
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	[1]					61,984
Costs Capitalized Subsequent to Acquisition	[2]					3,716
Gross Amount at Which Carried, Land						1,890
Gross Amount at Which Carried, Buildings and Improvements						63,810
Gross Amount at Which Carried, Total	[3]	$ 65,700				65,700
Accumulated Depreciation and Amortization		1,994				$ 1,994
Real Estate:
Balance at the end of the year	[3]	65,700
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 1,994
ENCLAVE PLACE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
ENCLAVE PLACE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
SUNTRUST CENTER [Member]
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	[1]					150,675
Costs Capitalized Subsequent to Acquisition	[2]					(192)
Gross Amount at Which Carried, Land						11,660
Gross Amount at Which Carried, Buildings and Improvements						138,823
Gross Amount at Which Carried, Total	[3]	$ 150,483				150,483
Accumulated Depreciation and Amortization		6,981				$ 6,981
Real Estate:
Balance at the end of the year	[3]	150,483
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 6,981
SUNTRUST CENTER [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
SUNTRUST CENTER [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
GALLERIA 300 [Member]
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	[1]					77,554
Costs Capitalized Subsequent to Acquisition	[2]					1,003
Gross Amount at Which Carried, Land						4,000
Gross Amount at Which Carried, Buildings and Improvements						74,557
Gross Amount at Which Carried, Total	[3]	$ 78,557				78,557
Accumulated Depreciation and Amortization		4,329				$ 4,329
Real Estate:
Balance at the end of the year	[3]	78,557
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,329
GALLERIA 300 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
GALLERIA 300 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
GLENRIDGE HIGHLANDS ONE [Member]
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	[1]					55,973
Costs Capitalized Subsequent to Acquisition	[2]					886
Gross Amount at Which Carried, Land						5,960
Gross Amount at Which Carried, Buildings and Improvements						50,899
Gross Amount at Which Carried, Total	[3]	$ 56,859				56,859
Accumulated Depreciation and Amortization		3,078				$ 3,078
Real Estate:
Balance at the end of the year	[3]	56,859
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 3,078
GLENRIDGE HIGHLANDS ONE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
GLENRIDGE HIGHLANDS ONE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
CNL CENTER I [Member]
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	[1]					84,328
Costs Capitalized Subsequent to Acquisition	[2]					(263)
Gross Amount at Which Carried, Land						6,470
Gross Amount at Which Carried, Buildings and Improvements						77,595
Gross Amount at Which Carried, Total	[3]	$ 84,065				84,065
Accumulated Depreciation and Amortization		1,505				$ 1,505
Real Estate:
Balance at the end of the year	[3]	84,065
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 1,505
CNL CENTER I [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
CNL CENTER I [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
CNL CENTER II [Member]
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	[1]					60,159
Costs Capitalized Subsequent to Acquisition	[2]					754
Gross Amount at Which Carried, Land						4,550
Gross Amount at Which Carried, Buildings and Improvements						56,363
Gross Amount at Which Carried, Total	[3]	$ 60,913				60,913
Accumulated Depreciation and Amortization		1,106				$ 1,106
Real Estate:
Balance at the end of the year	[3]	60,913
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 1,106
CNL CENTER II [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
CNL CENTER II [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
ONE WAYSIDE ROAD [Member]
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	[1]					63,364
Costs Capitalized Subsequent to Acquisition	[2]					0
Gross Amount at Which Carried, Land						6,240
Gross Amount at Which Carried, Buildings and Improvements						57,124
Gross Amount at Which Carried, Total	[3]	$ 63,364				63,364
Accumulated Depreciation and Amortization		1,643				$ 1,643
Real Estate:
Balance at the end of the year	[3]	63,364
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 1,643
ONE WAYSIDE ROAD [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
ONE WAYSIDE ROAD [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
GALLERIA 200 [Member]
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	[1]					62,295
Costs Capitalized Subsequent to Acquisition	[2]					(24)
Gross Amount at Which Carried, Land						6,470
Gross Amount at Which Carried, Buildings and Improvements						55,801
Gross Amount at Which Carried, Total	[3]	$ 62,271				62,271
Accumulated Depreciation and Amortization		768				$ 768
Real Estate:
Balance at the end of the year	[3]	62,271
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 768
GALLERIA 200 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
GALLERIA 200 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years
750 W. JOHN CARPENTER FREEWAY [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	[10]					100.00%
Initial Cost, Land	[10]					$ 7,860
Initial Cost, Buildings and Improvements	[10]					36,303
Initial Cost, Total	[1],[10]					44,163
Costs Capitalized Subsequent to Acquisition	[2],[10]					0
Gross Amount at Which Carried, Land	[10]					7,860
Gross Amount at Which Carried, Buildings and Improvements	[10]					36,303
Gross Amount at Which Carried, Total	[3],[10]	$ 44,163				44,163
Accumulated Depreciation and Amortization	[10]	219				$ 219
Real Estate:
Balance at the end of the year	[3],[10]	44,163
Accumulated Depreciation and Amortization:
Balance at the end of the year	[10]	$ 219
750 W. JOHN CARPENTER FREEWAY [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[10]	0 years
750 W. JOHN CARPENTER FREEWAY [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[10]	40 years
PIEDMONT POWER, LLC [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	[11]					100.00%
Initial Cost, Land	[11]					$ 0
Initial Cost, Buildings and Improvements	[11]					79
Initial Cost, Total	[1],[11]					79
Costs Capitalized Subsequent to Acquisition	[2],[11]					2,740
Gross Amount at Which Carried, Land	[11]					0
Gross Amount at Which Carried, Buildings and Improvements	[11]					2,819
Gross Amount at Which Carried, Total	[3],[11]	$ 2,819				2,819
Accumulated Depreciation and Amortization	[11]	534				$ 534
Real Estate:
Balance at the end of the year	[3],[11]	2,819
Accumulated Depreciation and Amortization:
Balance at the end of the year	[11]	$ 534
PIEDMONT POWER, LLC [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[11]	0 years
PIEDMONT POWER, LLC [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6],[11]	40 years
UNDEVELOPED LAND PARCELS [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage	[12]					100.00%
Initial Cost, Land	[12]					$ 18,061
Initial Cost, Buildings and Improvements	[12]					0
Initial Cost, Total	[1],[12]					18,061
Costs Capitalized Subsequent to Acquisition	[2],[12]					24,904
Gross Amount at Which Carried, Land	[12]					18,061
Gross Amount at Which Carried, Buildings and Improvements	[12]					24,904
Gross Amount at Which Carried, Total	[3],[12]	$ 42,965				42,965
Accumulated Depreciation and Amortization	[12]	6				$ 6
Real Estate:
Balance at the end of the year	[3],[12]	42,965
Accumulated Depreciation and Amortization:
Balance at the end of the year	[12]	6
8560 UPLAND DRIVE [Member]
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percentage						72.00%
Initial Cost, Land						$ 1,954
Initial Cost, Buildings and Improvements						11,216
Initial Cost, Total	[1]					13,170
Costs Capitalized Subsequent to Acquisition	[2]					1,438
Gross Amount at Which Carried, Land						2,048
Gross Amount at Which Carried, Buildings and Improvements						12,560
Gross Amount at Which Carried, Total	[3]	14,608				14,608
Accumulated Depreciation and Amortization		4,979				$ 4,979
Real Estate:
Balance at the end of the year	[3]	14,608
Accumulated Depreciation and Amortization:
Balance at the end of the year		$ 4,979
8560 UPLAND DRIVE [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	0 years
8560 UPLAND DRIVE [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation and Amortization is Computed	[6]	40 years

[1] Total initial cost excludes purchase price allocated to intangible lease origination costs and intangible lease liabilities.

[2] Includes write-offs of fully depreciated/amortized capitalized assets.

[3] The net carrying value of Piedmont’s total assets for federal income tax purposes is approximately $4.3 billion.

[4] Does not include impairment loss recognized on other assets as a result of the allocation of goodwill (See Note 2).

[5] Consists of write-offs of intangible lease assets related to lease restructurings, amendments and terminations.

[6] Piedmont’s assets are depreciated or amortized using the straight-lined method over the useful lives of the assets by class. Generally, Tenant Improvements and Lease Intangibles are amortized over the lease term. Generally, Building Improvements are depreciated over 5 - 25 years, Land Improvements are depreciated over 20 - 25 years, and Buildings are depreciated over 40 years.

[7] Property is owned subject to a long-term ground lease.

[8] As a result of its 49.5% membership interest in 1225 Eye Street, N.W. Associates, LLC, Piedmont owns 49.5% of the 1225 Eye Street building. Piedmont is deemed to have control over the joint venture and, as such, consolidates the joint venture, including the building.

[9] As a result of its 49.5% membership interest in 1201 Eye Street, N.W. Associates, LLC, Piedmont owns 49.5% of the 1201 Eye Street building. Piedmont is deemed to have control over the joint venture and, as such, consolidates the joint venture, including the building.

[10] As part of the acquisition of the property, Piedmont purchased an adjoining, developable land parcel of 3.5 acres for $1.0 million.

[11] Represents solar panels at the 400 Bridgewater Crossing building.

[12] Undeveloped Land Parcels includes land parcels which Piedmont may develop in the future, as well as the initial development costs of the 500 TownPark building.