SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	$ 914,510
Initial Cost to Company
Land	709,968
Buildings and Equipment	4,319,098
Costs Capitalized Subsequent to Acquisition	553,308
Gross amount carried at the end of the period
Impairment/Write Downs	(45,209)
Land	699,135
Buildings and Improvements	4,838,030
Total	5,537,165	7,829,409	7,244,232	6,357,258
Accumulated Depreciation	895,059	1,007,606	934,170	850,261
2501 20th Place South, Birmingham, AL | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	11,241
Initial Cost to Company
Land	4,000
Buildings and Equipment	19,604
Costs Capitalized Subsequent to Acquisition	475
Gross amount carried at the end of the period
Land	4,002
Buildings and Improvements	20,077
Total	24,079
Accumulated Depreciation	3,579
420 20th Street North, Birmingham, AL | CBD
Initial Cost to Company
Land	1,740
Buildings and Equipment	49,565
Costs Capitalized Subsequent to Acquisition	4,213
Gross amount carried at the end of the period
Land	1,740
Buildings and Improvements	53,778
Total	55,518
Accumulated Depreciation	3,206
Inverness Center, Birmingham, AL | Suburban property
Initial Cost to Company
Land	8,525
Buildings and Equipment	38,367
Costs Capitalized Subsequent to Acquisition	3,506
Gross amount carried at the end of the period
Land	8,525
Buildings and Improvements	41,873
Total	50,398
Accumulated Depreciation	3,827
785 Schilinger Road South, Mobile, AL | Suburban property
Initial Cost to Company
Land	1,540
Buildings and Equipment	9,732
Costs Capitalized Subsequent to Acquisition	(3)
Gross amount carried at the end of the period
Land	1,540
Buildings and Improvements	9,729
Total	11,269
Accumulated Depreciation	1,503
Arizona Center, Phoenix, AZ | CBD
Initial Cost to Company
Land	22,614
Buildings and Equipment	64,105
Costs Capitalized Subsequent to Acquisition	5,485
Gross amount carried at the end of the period
Land	22,614
Buildings and Improvements	69,590
Total	92,204
Accumulated Depreciation	4,782
4 South 84th Avenue, Tolleson, AZ | Suburban property
Initial Cost to Company
Land	1,257
Buildings and Equipment	9,210
Costs Capitalized Subsequent to Acquisition	696
Gross amount carried at the end of the period
Land	1,257
Buildings and Improvements	9,906
Total	11,163
Accumulated Depreciation	2,392
One South Church Avenue, Tucson, AZ | CBD
Initial Cost to Company
Land	3,261
Buildings and Equipment	26,357
Costs Capitalized Subsequent to Acquisition	2,728
Gross amount carried at the end of the period
Land	3,261
Buildings and Improvements	29,085
Total	32,346
Accumulated Depreciation	8,214
Parkshore Plaza, Folsom, CA | Suburban property
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	43,266
Initial Cost to Company
Land	4,370
Buildings and Equipment	41,749
Costs Capitalized Subsequent to Acquisition	371
Gross amount carried at the end of the period
Land	4,370
Buildings and Improvements	42,120
Total	46,490
Accumulated Depreciation	2,669
Leased Land, Gonzalez, CA | Suburban property
Initial Cost to Company
Land	18,941
Buildings and Equipment	9,060
Costs Capitalized Subsequent to Acquisition	3,822
Gross amount carried at the end of the period
Land	18,939
Buildings and Improvements	12,884
Total	31,823
Accumulated Depreciation	1,689
Sky Park Centre, San Diego, CA | Suburban property
Initial Cost to Company
Land	936
Buildings and Equipment	8,094
Costs Capitalized Subsequent to Acquisition	756
Gross amount carried at the end of the period
Land	935
Buildings and Improvements	8,851
Total	9,786
Accumulated Depreciation	2,751
Sorrento Valley Business Park, San Diego, CA | Suburban property
Initial Cost to Company
Land	1,425
Buildings and Equipment	12,842
Costs Capitalized Subsequent to Acquisition	3,316
Gross amount carried at the end of the period
Land	1,425
Buildings and Improvements	16,158
Total	17,583
Accumulated Depreciation	6,340
1921 E. Alton Avenue, Santa Ana, CA | Suburban property
Initial Cost to Company
Land	1,363
Buildings and Equipment	10,158
Costs Capitalized Subsequent to Acquisition	(3)
Gross amount carried at the end of the period
Land	1,362
Buildings and Improvements	10,156
Total	11,518
Accumulated Depreciation	2,627
9110 East Nichols Avenue, Centennial, CO | Suburban property
Initial Cost to Company
Land	1,708
Buildings and Equipment	14,616
Costs Capitalized Subsequent to Acquisition	3,960
Gross amount carried at the end of the period
Land	1,707
Buildings and Improvements	18,577
Total	20,284
Accumulated Depreciation	5,040
7450 Campus Drive, Colorado Springs, CO | Suburban property
Initial Cost to Company
Land	1,250
Buildings and Equipment	7,982
Costs Capitalized Subsequent to Acquisition	249
Gross amount carried at the end of the period
Land	1,250
Buildings and Improvements	8,231
Total	9,481
Accumulated Depreciation	733
1225 Seventeenth Street, Denver, CO | CBD
Initial Cost to Company
Land	22,400
Buildings and Equipment	110,090
Costs Capitalized Subsequent to Acquisition	10,705
Gross amount carried at the end of the period
Land	22,400
Buildings and Improvements	120,795
Total	143,195
Accumulated Depreciation	13,730
5073, 5075, & 5085 S. Syracuse Street, Denver, CO | Suburban property
Initial Cost to Company
Land	4,720
Buildings and Equipment	58,890
Gross amount carried at the end of the period
Land	4,720
Buildings and Improvements	58,890
Total	63,610
Accumulated Depreciation	5,398
1601 Dry Creek Drive, Longmont, CO | Suburban property
Initial Cost to Company
Land	3,714
Buildings and Equipment	24,397
Costs Capitalized Subsequent to Acquisition	4,156
Gross amount carried at the end of the period
Land	3,715
Buildings and Improvements	28,552
Total	32,267
Accumulated Depreciation	7,025
129 Worthington Ridge Road, Berlin, CT | Suburban property
Initial Cost to Company
Land	2,770
Buildings and Equipment	8,409
Costs Capitalized Subsequent to Acquisition	1,161
Gross amount carried at the end of the period
Impairment/Write Downs	(7,088)
Land	1,114
Buildings and Improvements	4,138
Total	5,252
Accumulated Depreciation	451
97 Newberry Road, East Windsor, CT | Suburban property
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	7,240
Initial Cost to Company
Land	2,960
Buildings and Equipment	12,360
Costs Capitalized Subsequent to Acquisition	30
Gross amount carried at the end of the period
Land	2,943
Buildings and Improvements	12,407
Total	15,350
Accumulated Depreciation	2,245
185 Asylum Street, Hartford, CT | CBD
Initial Cost to Company
Land	15,930
Buildings and Equipment	60,312
Costs Capitalized Subsequent to Acquisition	820
Gross amount carried at the end of the period
Land	15,930
Buildings and Improvements	61,132
Total	77,062
Accumulated Depreciation	2,661
599 Research Parkway, Meriden, CT | Suburban property
Initial Cost to Company
Land	768
Buildings and Equipment	6,164
Costs Capitalized Subsequent to Acquisition	1,160
Gross amount carried at the end of the period
Land	768
Buildings and Improvements	7,324
Total	8,092
Accumulated Depreciation	1,684
33 Stiles Lane, North Haven, CT | Suburban property
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	3,456
Initial Cost to Company
Land	2,090
Buildings and Equipment	9,141
Costs Capitalized Subsequent to Acquisition	216
Gross amount carried at the end of the period
Land	2,091
Buildings and Improvements	9,356
Total	11,447
Accumulated Depreciation	1,689
181 Marsh Hill Road, Orange, CT | Suburban property
Initial Cost to Company
Land	2,270
Buildings and Equipment	7,943
Costs Capitalized Subsequent to Acquisition	419
Gross amount carried at the end of the period
Land	2,271
Buildings and Improvements	8,361
Total	10,632
Accumulated Depreciation	1,446
50 Barnes Industrial Road North, Wallingford, CT | Suburban property
Initial Cost to Company
Land	2,300
Buildings and Equipment	8,621
Costs Capitalized Subsequent to Acquisition	2,937
Gross amount carried at the end of the period
Land	2,301
Buildings and Improvements	11,557
Total	13,858
Accumulated Depreciation	2,071
5-9 Barnes Industrial Road, Wallingford, CT | Suburban property
Initial Cost to Company
Land	740
Buildings and Equipment	2,552
Costs Capitalized Subsequent to Acquisition	37
Gross amount carried at the end of the period
Land	741
Buildings and Improvements	2,588
Total	3,329
Accumulated Depreciation	475
860 North Main Street, Wallingford, CT | Suburban property
Initial Cost to Company
Land	680
Buildings and Equipment	3,144
Costs Capitalized Subsequent to Acquisition	990
Gross amount carried at the end of the period
Land	680
Buildings and Improvements	4,134
Total	4,814
Accumulated Depreciation	813
One Barnes Industrial Road South, Wallingford, CT | Suburban property
Initial Cost to Company
Land	800
Buildings and Equipment	2,251
Costs Capitalized Subsequent to Acquisition	5
Gross amount carried at the end of the period
Land	800
Buildings and Improvements	2,256
Total	3,056
Accumulated Depreciation	409
100 Northfield Drive, Windsor, CT | Suburban property
Initial Cost to Company
Land	1,376
Buildings and Equipment	11,212
Costs Capitalized Subsequent to Acquisition	2,911
Gross amount carried at the end of the period
Land	1,376
Buildings and Improvements	14,123
Total	15,499
Accumulated Depreciation	4,039
1250 H Street, NW, Washington, DC | CBD
Initial Cost to Company
Land	5,975
Buildings and Equipment	53,778
Costs Capitalized Subsequent to Acquisition	4,560
Gross amount carried at the end of the period
Land	5,975
Buildings and Improvements	58,338
Total	64,313
Accumulated Depreciation	22,313
Georgetown-Green and Harris Buildings, Washington, DC | CBD
Initial Cost to Company
Land	24,000
Buildings and Equipment	35,979
Costs Capitalized Subsequent to Acquisition	21
Gross amount carried at the end of the period
Land	24,000
Buildings and Improvements	36,000
Total	60,000
Accumulated Depreciation	3,897
802 Delaware Avenue, Wilmington, DE | CBD
Initial Cost to Company
Land	4,409
Buildings and Equipment	39,681
Costs Capitalized Subsequent to Acquisition	10,320
Gross amount carried at the end of the period
Land	4,413
Buildings and Improvements	49,997
Total	54,410
Accumulated Depreciation	20,423
6600 North Military Trail, Boca Raton, FL | Suburban property
Initial Cost to Company
Land	15,900
Buildings and Equipment	129,790
Gross amount carried at the end of the period
Land	15,900
Buildings and Improvements	129,790
Total	145,690
Accumulated Depreciation	9,734
225 Water Street, Jacksonville, FL | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	38,693
Initial Cost to Company
Land	1,480
Buildings and Equipment	43,770
Costs Capitalized Subsequent to Acquisition	3,020
Gross amount carried at the end of the period
Land	1,480
Buildings and Improvements	46,790
Total	48,270
Accumulated Depreciation	6,280
The Exchange, Atlanta, GA | Suburban property
Initial Cost to Company
Land	1,576
Buildings and Equipment	13,134
Costs Capitalized Subsequent to Acquisition	3,195
Gross amount carried at the end of the period
Land	1,577
Buildings and Improvements	16,328
Total	17,905
Accumulated Depreciation	3,822
9040 Roswell Road, Atlanta, GA | Suburban property
Initial Cost to Company
Land	2,459
Buildings and Equipment	18,549
Costs Capitalized Subsequent to Acquisition	2,153
Gross amount carried at the end of the period
Land	2,463
Buildings and Improvements	20,698
Total	23,161
Accumulated Depreciation	4,801
Executive Park, Atlanta, GA | Suburban property
Initial Cost to Company
Land	13,729
Buildings and Equipment	78,032
Costs Capitalized Subsequent to Acquisition	5,567
Gross amount carried at the end of the period
Impairment/Write Downs	(34,109)
Land	13,727
Buildings and Improvements	49,492
Total	63,219
Accumulated Depreciation	12,434
3920 Arkwright Road, Macon, GA | Suburban property
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	11,976
Initial Cost to Company
Land	2,674
Buildings and Equipment	19,311
Costs Capitalized Subsequent to Acquisition	2,401
Gross amount carried at the end of the period
Land	2,675
Buildings and Improvements	21,711
Total	24,386
Accumulated Depreciation	4,178
1775 West Oak Commons Court, Marietta, GA | Suburban property
Initial Cost to Company
Land	2,190
Buildings and Equipment	6,586
Costs Capitalized Subsequent to Acquisition	985
Gross amount carried at the end of the period
Land	2,190
Buildings and Improvements	7,571
Total	9,761
Accumulated Depreciation	1,110
633 Ahua Street, Honolulu, HI | Suburban property
Initial Cost to Company
Land	1,256
Buildings and Equipment	3
Costs Capitalized Subsequent to Acquisition	18,047
Gross amount carried at the end of the period
Land	1,256
Buildings and Improvements	18,050
Total	19,306
Accumulated Depreciation	2,945
905 Meridian Lake Drive, Aurora, IL | Suburban property
Initial Cost to Company
Land	1,740
Buildings and Equipment	13,586
Costs Capitalized Subsequent to Acquisition	52
Gross amount carried at the end of the period
Land	1,740
Buildings and Improvements	13,638
Total	15,378
Accumulated Depreciation	2,265
1200 Lakeside Drive, Bannockburn, IL | Suburban property
Initial Cost to Company
Land	5,846
Buildings and Equipment	48,568
Costs Capitalized Subsequent to Acquisition	10,422
Gross amount carried at the end of the period
Land	5,858
Buildings and Improvements	58,978
Total	64,836
Accumulated Depreciation	10,688
Illinois Center, Chicago, IL | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	151,364
Initial Cost to Company
Land	66,757
Buildings and Equipment	239,143
Costs Capitalized Subsequent to Acquisition	22,347
Gross amount carried at the end of the period
Land	66,757
Buildings and Improvements	261,490
Total	328,247
Accumulated Depreciation	15,082
600 West Chicago Avenue, Chicago, IL | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	273,506
Initial Cost to Company
Land	34,980
Buildings and Equipment	315,643
Costs Capitalized Subsequent to Acquisition	1,775
Gross amount carried at the end of the period
Land	34,989
Buildings and Improvements	317,409
Total	352,398
Accumulated Depreciation	19,213
8750 Bryn Mawr Avenue, Chicago, IL | Suburban property
Initial Cost to Company
Land	6,600
Buildings and Equipment	77,764
Costs Capitalized Subsequent to Acquisition	4,292
Gross amount carried at the end of the period
Land	6,600
Buildings and Improvements	82,056
Total	88,656
Accumulated Depreciation	6,652
1955 West Field Court, Lake Forest, IL | Suburban property
Initial Cost to Company
Land	1,258
Buildings and Equipment	9,630
Costs Capitalized Subsequent to Acquisition	2,990
Gross amount carried at the end of the period
Land	1,261
Buildings and Improvements	12,617
Total	13,878
Accumulated Depreciation	2,495
101-115 W. Washington Street, Indianapolis, IN | CBD
Initial Cost to Company
Land	7,495
Buildings and Equipment	60,465
Costs Capitalized Subsequent to Acquisition	20,429
Gross amount carried at the end of the period
Land	7,496
Buildings and Improvements	80,893
Total	88,389
Accumulated Depreciation	18,710
111 Monument Circle, Indianapolis, IN | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	120,885
Initial Cost to Company
Land	9,670
Buildings and Equipment	158,085
Costs Capitalized Subsequent to Acquisition	1,577
Gross amount carried at the end of the period
Land	9,670
Buildings and Improvements	159,662
Total	169,332
Accumulated Depreciation	4,617
5015 S. Water Circle, Wichita, KS | Suburban property
Initial Cost to Company
Land	2,720
Buildings and Equipment	2,029
Costs Capitalized Subsequent to Acquisition	1,124
Gross amount carried at the end of the period
Land	2,719
Buildings and Improvements	3,154
Total	5,873
Accumulated Depreciation	570
701 Poydras Street, New Orleans, LA | CBD
Initial Cost to Company
Land	9,100
Buildings and Equipment	78,540
Costs Capitalized Subsequent to Acquisition	4,908
Gross amount carried at the end of the period
Land	9,100
Buildings and Improvements	83,448
Total	92,548
Accumulated Depreciation	4,892
109 Brookline Avenue, Boston, MA | CBD
Initial Cost to Company
Land	3,168
Buildings and Equipment	30,397
Costs Capitalized Subsequent to Acquisition	13,591
Gross amount carried at the end of the period
Land	3,168
Buildings and Improvements	43,988
Total	47,156
Accumulated Depreciation	18,354
Cabot Business Park Land, Mansfield, MA | Suburban property
Initial Cost to Company
Land	1,033
Gross amount carried at the end of the period
Land	1,033
Total	1,033
2300 Crown Colony Drive, Quincy, MA | Suburban property
Initial Cost to Company
Land	774
Buildings and Equipment	5,815
Costs Capitalized Subsequent to Acquisition	1,529
Gross amount carried at the end of the period
Land	779
Buildings and Improvements	7,339
Total	8,118
Accumulated Depreciation	2,073
340 Thompson Road, Webster, MA | Suburban property
Initial Cost to Company
Land	315
Buildings and Equipment	2,834
Costs Capitalized Subsequent to Acquisition	39
Gross amount carried at the end of the period
Land	315
Buildings and Improvements	2,873
Total	3,188
Accumulated Depreciation	1,196
100 South Charles Street, Baltimore, MD | CBD
Initial Cost to Company
Buildings and Equipment	12,430
Costs Capitalized Subsequent to Acquisition	3,840
Gross amount carried at the end of the period
Buildings and Improvements	16,270
Total	16,270
Accumulated Depreciation	6,069
111 Market Place, Baltimore, MD | CBD
Initial Cost to Company
Land	6,328
Buildings and Equipment	54,645
Costs Capitalized Subsequent to Acquisition	14,343
Gross amount carried at the end of the period
Land	6,328
Buildings and Improvements	68,988
Total	75,316
Accumulated Depreciation	19,409
25 S. Charles Street, Baltimore, MD | CBD
Initial Cost to Company
Land	2,830
Buildings and Equipment	22,996
Costs Capitalized Subsequent to Acquisition	12,672
Gross amount carried at the end of the period
Land	2,830
Buildings and Improvements	35,668
Total	38,498
Accumulated Depreciation	9,839
820 W. Diamond, Gaithersburg, MD | Suburban property
Initial Cost to Company
Land	4,381
Buildings and Equipment	18,798
Costs Capitalized Subsequent to Acquisition	9,959
Gross amount carried at the end of the period
Land	4,461
Buildings and Improvements	28,677
Total	33,138
Accumulated Depreciation	9,245
6710 Oxon Hill, Oxon Hill, MD | Suburban property
Initial Cost to Company
Land	3,181
Buildings and Equipment	13,653
Costs Capitalized Subsequent to Acquisition	2,845
Gross amount carried at the end of the period
Land	3,131
Buildings and Improvements	16,548
Total	19,679
Accumulated Depreciation	6,668
Danac Stiles Business Park, Rockville, MD | Suburban property
Initial Cost to Company
Land	7,638
Buildings and Equipment	62,572
Costs Capitalized Subsequent to Acquisition	5,077
Gross amount carried at the end of the period
Land	7,639
Buildings and Improvements	67,648
Total	75,287
Accumulated Depreciation	14,982
East Eisenhower Parkway, Ann Arbor, MI | Suburban property
Initial Cost to Company
Land	6,760
Buildings and Equipment	46,988
Costs Capitalized Subsequent to Acquisition	982
Gross amount carried at the end of the period
Land	6,760
Buildings and Improvements	47,970
Total	54,730
Accumulated Depreciation	4,252
2250 Pilot Knob Road, Mendota Heights, MN | Suburban property
Initial Cost to Company
Land	533
Buildings and Equipment	4,795
Costs Capitalized Subsequent to Acquisition	1,103
Gross amount carried at the end of the period
Land	533
Buildings and Improvements	5,898
Total	6,431
Accumulated Depreciation	2,179
9800 Shelard Parkway, Plymouth, MN | Suburban property
Initial Cost to Company
Land	563
Buildings and Equipment	5,064
Costs Capitalized Subsequent to Acquisition	1,022
Gross amount carried at the end of the period
Land	563
Buildings and Improvements	6,086
Total	6,649
Accumulated Depreciation	2,367
Rosedale Corporate Plaza, Roseville, MN | Suburban property
Initial Cost to Company
Land	1,860
Buildings and Equipment	16,750
Costs Capitalized Subsequent to Acquisition	8,949
Gross amount carried at the end of the period
Land	1,859
Buildings and Improvements	25,700
Total	27,559
Accumulated Depreciation	7,541
411 Farwell Avenue, South St. Paul, MN | Suburban property
Initial Cost to Company
Land	1,303
Buildings and Equipment	10,451
Costs Capitalized Subsequent to Acquisition	3,949
Gross amount carried at the end of the period
Land	1,304
Buildings and Improvements	14,399
Total	15,703
Accumulated Depreciation	2,613
6200 Glenn Carlson Drive, St. Cloud, MN | Suburban property
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	7,987
Initial Cost to Company
Land	1,950
Buildings and Equipment	13,803
Gross amount carried at the end of the period
Land	1,950
Buildings and Improvements	13,803
Total	15,753
Accumulated Depreciation	1,467
1000 Shelard Parkway, St. Louis Park, MN | Suburban property
Initial Cost to Company
Land	695
Buildings and Equipment	6,254
Costs Capitalized Subsequent to Acquisition	2,004
Gross amount carried at the end of the period
Land	695
Buildings and Improvements	8,258
Total	8,953
Accumulated Depreciation	3,018
525 Park Street, St. Paul, MN | CBD
Initial Cost to Company
Land	696
Buildings and Equipment	6,263
Costs Capitalized Subsequent to Acquisition	1,669
Gross amount carried at the end of the period
Land	695
Buildings and Improvements	7,933
Total	8,628
Accumulated Depreciation	3,150
1900 Meyer Drury Drive, Arnold, MO | Suburban property
Initial Cost to Company
Land	834
Buildings and Equipment	7,302
Costs Capitalized Subsequent to Acquisition	475
Gross amount carried at the end of the period
Land	838
Buildings and Improvements	7,773
Total	8,611
Accumulated Depreciation	1,830
4700 Belleview Avenue, Kansas City, MO | Suburban property
Initial Cost to Company
Land	1,165
Buildings and Equipment	3,097
Costs Capitalized Subsequent to Acquisition	2,110
Gross amount carried at the end of the period
Land	1,165
Buildings and Improvements	5,207
Total	6,372
Accumulated Depreciation	601
131-165 West Ninth Street, N. Kansas City, MO | Suburban property
Initial Cost to Company
Land	494
Buildings and Equipment	959
Costs Capitalized Subsequent to Acquisition	300
Gross amount carried at the end of the period
Land	494
Buildings and Improvements	1,259
Total	1,753
Accumulated Depreciation	165
12655 Olive Boulevard, St. Louis, MO | Suburban property
Initial Cost to Company
Land	4,800
Buildings and Equipment	8,020
Costs Capitalized Subsequent to Acquisition	1,690
Gross amount carried at the end of the period
Land	4,801
Buildings and Improvements	9,709
Total	14,510
Accumulated Depreciation	1,633
1285 Fern Ridge Parkway, St. Louis, MO | Suburban property
Initial Cost to Company
Land	903
Buildings and Equipment	7,602
Costs Capitalized Subsequent to Acquisition	1,110
Gross amount carried at the end of the period
Land	903
Buildings and Improvements	8,712
Total	9,615
Accumulated Depreciation	2,162
300 North Greene Street, Greensboro, NC | CBD
Initial Cost to Company
Land	2,070
Buildings and Equipment	37,073
Costs Capitalized Subsequent to Acquisition	1,184
Gross amount carried at the end of the period
Land	2,070
Buildings and Improvements	38,257
Total	40,327
Accumulated Depreciation	3,228
111 River Street, Hoboken, NJ | CBD
Initial Cost to Company
Buildings and Equipment	134,199
Costs Capitalized Subsequent to Acquisition	201
Gross amount carried at the end of the period
Buildings and Improvements	134,400
Total	134,400
Accumulated Depreciation	14,836
5 Paragon Drive, Montvale, NJ | Suburban property
Initial Cost to Company
Land	3,650
Buildings and Equipment	13,725
Costs Capitalized Subsequent to Acquisition	309
Gross amount carried at the end of the period
Land	3,650
Buildings and Improvements	14,034
Total	17,684
Accumulated Depreciation	1,010
One Park Square, Albuquerque, NM | CBD
Initial Cost to Company
Land	2,582
Buildings and Equipment	21,532
Costs Capitalized Subsequent to Acquisition	4,668
Gross amount carried at the end of the period
Land	2,582
Buildings and Improvements	26,200
Total	28,782
Accumulated Depreciation	7,492
North Point Office Complex, Cleveland, OH | CBD
Initial Cost to Company
Land	12,000
Buildings and Equipment	94,448
Costs Capitalized Subsequent to Acquisition	14,954
Gross amount carried at the end of the period
Land	12,000
Buildings and Improvements	109,402
Total	121,402
Accumulated Depreciation	15,380
401 Vine Street, Delmont, PA | Suburban property
Initial Cost to Company
Land	1,575
Buildings and Equipment	5,542
Gross amount carried at the end of the period
Land	1,575
Buildings and Improvements	5,542
Total	7,117
Accumulated Depreciation	853
515 Pennsylvania Avenue, Fort Washington, PA | Suburban property
Initial Cost to Company
Land	1,872
Buildings and Equipment	8,816
Costs Capitalized Subsequent to Acquisition	4,291
Gross amount carried at the end of the period
Land	1,872
Buildings and Improvements	13,107
Total	14,979
Accumulated Depreciation	4,331
443 Gulph Road, King of Prussia, PA | Suburban property
Initial Cost to Company
Land	634
Buildings and Equipment	3,251
Costs Capitalized Subsequent to Acquisition	1,070
Gross amount carried at the end of the period
Land	634
Buildings and Improvements	4,321
Total	4,955
Accumulated Depreciation	1,932
4350 Northern Pike, Monroeville, PA | Suburban property
Initial Cost to Company
Land	6,558
Buildings and Equipment	51,775
Costs Capitalized Subsequent to Acquisition	16,895
Gross amount carried at the end of the period
Land	6,564
Buildings and Improvements	68,664
Total	75,228
Accumulated Depreciation	13,106
Cherrington Corporate Center, Moon Township, PA | Suburban property
Initial Cost to Company
Land	11,369
Buildings and Equipment	39,892
Costs Capitalized Subsequent to Acquisition	18,008
Gross amount carried at the end of the period
Land	12,192
Buildings and Improvements	57,077
Total	69,269
Accumulated Depreciation	17,405
1500 Market Street, Philadelphia, PA | CBD
Initial Cost to Company
Land	18,758
Buildings and Equipment	167,487
Costs Capitalized Subsequent to Acquisition	89,351
Gross amount carried at the end of the period
Land	18,758
Buildings and Improvements	256,838
Total	275,596
Accumulated Depreciation	63,340
1525 Locust Street, Philadelphia, PA | CBD
Initial Cost to Company
Land	931
Buildings and Equipment	8,377
Costs Capitalized Subsequent to Acquisition	1,605
Gross amount carried at the end of the period
Land	930
Buildings and Improvements	9,983
Total	10,913
Accumulated Depreciation	3,341
1600 Market Street, Philadelphia, PA | CBD
Initial Cost to Company
Land	3,462
Buildings and Equipment	111,946
Costs Capitalized Subsequent to Acquisition	24,590
Gross amount carried at the end of the period
Land	3,462
Buildings and Improvements	136,536
Total	139,998
Accumulated Depreciation	55,731
1735 Market Street, Philadelphia, PA | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	173,247
Initial Cost to Company
Land	24,753
Buildings and Equipment	222,775
Costs Capitalized Subsequent to Acquisition	49,206
Gross amount carried at the end of the period
Land	24,747
Buildings and Improvements	271,987
Total	296,734
Accumulated Depreciation	104,277
Foster Plaza, Pittsburgh, PA | Suburban property
Initial Cost to Company
Land	6,168
Buildings and Equipment	51,588
Costs Capitalized Subsequent to Acquisition	13,209
Gross amount carried at the end of the period
Land	6,169
Buildings and Improvements	64,796
Total	70,965
Accumulated Depreciation	13,813
128 Crews Drive, Columbia, SC | Suburban property
Initial Cost to Company
Land	2,420
Buildings and Equipment	4,017
Costs Capitalized Subsequent to Acquisition	1,321
Gross amount carried at the end of the period
Impairment/Write Downs	(4,012)
Land	1,024
Buildings and Improvements	2,722
Total	3,746
Accumulated Depreciation	279
1320 Main Street, Columbia, SC | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	41,480
Initial Cost to Company
Land	1,660
Buildings and Equipment	53,058
Costs Capitalized Subsequent to Acquisition	25
Gross amount carried at the end of the period
Land	1,660
Buildings and Improvements	53,083
Total	54,743
Accumulated Depreciation	1,661
111 Southchase Boulevard, Fountain Inn, SC | Suburban property
Initial Cost to Company
Land	520
Buildings and Equipment	6,822
Costs Capitalized Subsequent to Acquisition	967
Gross amount carried at the end of the period
Land	520
Buildings and Improvements	7,789
Total	8,309
Accumulated Depreciation	1,195
1043 Global Avenue, Graniteville, SC | Suburban property
Initial Cost to Company
Land	720
Buildings and Equipment	15,552
Costs Capitalized Subsequent to Acquisition	358
Gross amount carried at the end of the period
Land	720
Buildings and Improvements	15,910
Total	16,630
Accumulated Depreciation	2,603
633 Frazier Drive, Franklin, TN | Suburban property
Initial Cost to Company
Land	5,800
Buildings and Equipment	13,190
Costs Capitalized Subsequent to Acquisition	(10)
Gross amount carried at the end of the period
Land	5,800
Buildings and Improvements	13,180
Total	18,980
Accumulated Depreciation	2,052
775 Ridge Lake Boulevard, Memphis, TN | CBD
Initial Cost to Company
Land	2,113
Buildings and Equipment	18,201
Costs Capitalized Subsequent to Acquisition	499
Gross amount carried at the end of the period
Land	2,114
Buildings and Improvements	18,699
Total	20,813
Accumulated Depreciation	4,539
1601 Rio Grande Street, Austin, TX | CBD
Initial Cost to Company
Land	688
Buildings and Equipment	6,192
Costs Capitalized Subsequent to Acquisition	1,160
Gross amount carried at the end of the period
Land	697
Buildings and Improvements	7,343
Total	8,040
Accumulated Depreciation	2,637
206 East 9th Street, Austin, TX | CBD
REAL ESTATE AND ACCUMULATED DEPRECIATION
Encumbrances	30,169
Initial Cost to Company
Land	7,900
Buildings and Equipment	38,533
Costs Capitalized Subsequent to Acquisition	1,201
Gross amount carried at the end of the period
Land	7,900
Buildings and Improvements	39,734
Total	47,634
Accumulated Depreciation	1,531
4515 Seton Center Parkway, Austin, TX | Suburban property
Initial Cost to Company
Land	2,038
Buildings and Equipment	18,338
Costs Capitalized Subsequent to Acquisition	2,779
Gross amount carried at the end of the period
Land	2,037
Buildings and Improvements	21,118
Total	23,155
Accumulated Depreciation	7,785
4516 Seton Center Parkway, Austin, TX | Suburban property
Initial Cost to Company
Land	2,028
Buildings and Equipment	18,251
Costs Capitalized Subsequent to Acquisition	2,799
Gross amount carried at the end of the period
Land	2,027
Buildings and Improvements	21,051
Total	23,078
Accumulated Depreciation	7,779
7800 Shoal Creek Boulevard, Austin, TX | Suburban property
Initial Cost to Company
Land	1,731
Buildings and Equipment	14,921
Costs Capitalized Subsequent to Acquisition	3,736
Gross amount carried at the end of the period
Land	1,731
Buildings and Improvements	18,657
Total	20,388
Accumulated Depreciation	6,279
812 San Antonio Street, Austin, TX | CBD
Initial Cost to Company
Land	626
Buildings and Equipment	5,636
Costs Capitalized Subsequent to Acquisition	2,207
Gross amount carried at the end of the period
Land	621
Buildings and Improvements	7,848
Total	8,469
Accumulated Depreciation	2,535
8701 N Mopac, Austin, TX | Suburban property
Initial Cost to Company
Land	1,574
Buildings and Equipment	14,168
Costs Capitalized Subsequent to Acquisition	2,651
Gross amount carried at the end of the period
Land	1,573
Buildings and Improvements	16,820
Total	18,393
Accumulated Depreciation	5,759
Bridgepoint Parkway, Austin, TX | Suburban property
Initial Cost to Company
Land	7,784
Buildings and Equipment	70,526
Costs Capitalized Subsequent to Acquisition	9,302
Gross amount carried at the end of the period
Land	7,784
Buildings and Improvements	79,828
Total	87,612
Accumulated Depreciation	32,105
Lakewood on the Park, Austin, TX | Suburban property
Initial Cost to Company
Land	3,548
Buildings and Equipment	31,936
Costs Capitalized Subsequent to Acquisition	1,512
Gross amount carried at the end of the period
Land	3,548
Buildings and Improvements	33,448
Total	36,996
Accumulated Depreciation	12,603
Research Park, Austin, TX | Suburban property
Initial Cost to Company
Land	15,859
Buildings and Equipment	60,175
Costs Capitalized Subsequent to Acquisition	14,520
Gross amount carried at the end of the period
Land	18,411
Buildings and Improvements	72,143
Total	90,554
Accumulated Depreciation	24,124
9840 Gateway Boulevard North, El Paso, TX | Suburban property
Initial Cost to Company
Land	1,700
Buildings and Equipment	9,736
Costs Capitalized Subsequent to Acquisition	(4)
Gross amount carried at the end of the period
Land	1,700
Buildings and Improvements	9,732
Total	11,432
Accumulated Depreciation	1,509
3003 South Expressway 281, Hidalgo, TX | Suburban property
Initial Cost to Company
Land	1,480
Buildings and Equipment	15,533
Costs Capitalized Subsequent to Acquisition	(9)
Gross amount carried at the end of the period
Land	1,480
Buildings and Improvements	15,524
Total	17,004
Accumulated Depreciation	2,417
3330 N Washington Boulevard, Arlington, VA | Suburban property
Initial Cost to Company
Land	810
Buildings and Equipment	7,289
Costs Capitalized Subsequent to Acquisition	616
Gross amount carried at the end of the period
Land	811
Buildings and Improvements	7,904
Total	8,715
Accumulated Depreciation	2,898
6160 Kempsville Circle, Norfolk, VA | Suburban property
Initial Cost to Company
Land	1,273
Buildings and Equipment	11,083
Costs Capitalized Subsequent to Acquisition	4,226
Gross amount carried at the end of the period
Land	1,273
Buildings and Improvements	15,309
Total	16,582
Accumulated Depreciation	5,221
Thunderbolt Place, Chantilly, VA | Suburban property
Initial Cost to Company
Land	1,374
Buildings and Equipment	12,369
Costs Capitalized Subsequent to Acquisition	941
Gross amount carried at the end of the period
Land	1,375
Buildings and Improvements	13,309
Total	14,684
Accumulated Depreciation	4,919
448 Viking Drive, Virginia Beach, VA | Suburban property
Initial Cost to Company
Land	682
Buildings and Equipment	5,431
Costs Capitalized Subsequent to Acquisition	1,429
Gross amount carried at the end of the period
Land	686
Buildings and Improvements	6,856
Total	7,542
Accumulated Depreciation	1,425
333 108th Avenue NE, Bellevue, WA | CBD
Initial Cost to Company
Land	14,400
Buildings and Equipment	136,412
Costs Capitalized Subsequent to Acquisition	1,666
Gross amount carried at the end of the period
Land	14,400
Buildings and Improvements	138,078
Total	152,478
Accumulated Depreciation	14,798
600 108th Avenue NE, Bellevue, WA | CBD
Initial Cost to Company
Land	3,555
Buildings and Equipment	30,244
Costs Capitalized Subsequent to Acquisition	8,953
Gross amount carried at the end of the period
Land	3,555
Buildings and Improvements	39,197
Total	42,752
Accumulated Depreciation	8,637
1331 North Center Parkway, Kennewick, WA | Suburban property
Initial Cost to Company
Land	1,850
Buildings and Equipment	7,339
Costs Capitalized Subsequent to Acquisition	(2)
Gross amount carried at the end of the period
Land	1,850
Buildings and Improvements	7,337
Total	9,187
Accumulated Depreciation	1,139
100 East Wisconsin Avenue, Milwaukee, WI | CBD
Initial Cost to Company
Land	3,150
Buildings and Equipment	72,113
Costs Capitalized Subsequent to Acquisition	4,592
Gross amount carried at the end of the period
Land	3,150
Buildings and Improvements	76,705
Total	79,855
Accumulated Depreciation	6,676
111 East Kilbourn Avenue, Milwaukee, WI | CBD
Initial Cost to Company
Land	2,400
Buildings and Equipment	47,562
Costs Capitalized Subsequent to Acquisition	4,897
Gross amount carried at the end of the period
Land	2,400
Buildings and Improvements	52,459
Total	54,859
Accumulated Depreciation	7,481
7 Modal Crescent, Canning Vale, Australia | Suburban property
Initial Cost to Company
Land	9,806
Buildings and Equipment	3,925
Costs Capitalized Subsequent to Acquisition	641
Gross amount carried at the end of the period
Land	8,915
Buildings and Improvements	5,457
Total	14,372
Accumulated Depreciation	358
71-93 Whiteside Road, Clayton, Australia | Suburban property
Initial Cost to Company
Land	9,757
Buildings and Equipment	8,495
Costs Capitalized Subsequent to Acquisition	(1,658)
Gross amount carried at the end of the period
Land	8,870
Buildings and Improvements	7,724
Total	16,594
Accumulated Depreciation	624
9-13 Titanium Court, Crestmead, Australia | Suburban property
Initial Cost to Company
Land	3,400
Buildings and Equipment	3,185
Costs Capitalized Subsequent to Acquisition	(598)
Gross amount carried at the end of the period
Land	3,091
Buildings and Improvements	2,896
Total	5,987
Accumulated Depreciation	234
16 Rodborough Road, Frenchs Forest, Australia | Suburban property
Initial Cost to Company
Land	7,355
Buildings and Equipment	9,498
Costs Capitalized Subsequent to Acquisition	(1,069)
Gross amount carried at the end of the period
Land	6,686
Buildings and Improvements	9,098
Total	15,784
Accumulated Depreciation	710
22 Rodborough Road, Frenchs Forest, Australia | Suburban property
Initial Cost to Company
Land	2,452
Buildings and Equipment	3,923
Costs Capitalized Subsequent to Acquisition	320
Gross amount carried at the end of the period
Land	2,229
Buildings and Improvements	4,466
Total	6,695
Accumulated Depreciation	343
127-161 Cherry Lane, Laverton North, Australia | Suburban property
Initial Cost to Company
Land	4,266
Buildings and Equipment	5,220
Costs Capitalized Subsequent to Acquisition	(862)
Gross amount carried at the end of the period
Land	3,878
Buildings and Improvements	4,746
Total	8,624
Accumulated Depreciation	384
310-314 Invermay Road, Mowbray, Australia | Suburban property
Initial Cost to Company
Land	431
Buildings and Equipment	535
Costs Capitalized Subsequent to Acquisition	(87)
Gross amount carried at the end of the period
Land	392
Buildings and Improvements	487
Total	879
Accumulated Depreciation	39
253-293 George Town Road, Rocherlea, Australia | Suburban property
Initial Cost to Company
Land	2,108
Buildings and Equipment	1,331
Costs Capitalized Subsequent to Acquisition	(312)
Gross amount carried at the end of the period
Land	1,917
Buildings and Improvements	1,210
Total	3,127
Accumulated Depreciation	98
310-320 Pitt Street, Sydney, Australia | CBD
Initial Cost to Company
Land	63,271
Buildings and Equipment	104,588
Costs Capitalized Subsequent to Acquisition	(18,524)
Gross amount carried at the end of the period
Land	56,610
Buildings and Improvements	92,725
Total	149,335
Accumulated Depreciation	7,370
44-46 Mandarin Street, Villawood, Australia | Suburban property
Initial Cost to Company
Land	6,374
Buildings and Equipment	8,179
Costs Capitalized Subsequent to Acquisition	(556)
Gross amount carried at the end of the period
Land	5,795
Buildings and Improvements	8,202
Total	13,997
Accumulated Depreciation	613
19 Leadership Way, Wangara, Australia | Suburban property
Initial Cost to Company
Land	4,217
Buildings and Equipment	2,685
Costs Capitalized Subsequent to Acquisition	(421)
Gross amount carried at the end of the period
Land	3,833
Buildings and Improvements	2,648
Total	6,481
Accumulated Depreciation	$ 203