Schedule III - Summary of Real Estate and Accumulated Depreciation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 635,345	$ 660,127
Initial cost to company, Land	1,116,102
Initial cost to company, Buildings and Improvements	1,781,103
Cost Capitalized Subsequent to Acquisition	2,711,793
Gross amount at which carried at close of period, Land	1,102,836
Gross amount at which carried at close of period, Buildings and Improvements	4,506,162
Gross amount at which carried at close of period, Total	5,608,998	5,149,463	4,779,674	4,426,444
Accumulated Depreciation and Amortization	1,467,050	1,350,471	1,224,295	1,127,588
150 Post Street
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	11,685
Initial cost to company, Buildings and Improvements	9,181
Cost Capitalized Subsequent to Acquisition	16,350
Gross amount at which carried at close of period, Land	11,685
Gross amount at which carried at close of period, Buildings and Improvements	25,531
Gross amount at which carried at close of period, Total	37,216
Accumulated Depreciation and Amortization	16,363
Life on which depreciation in latest income statements is computed	35 years
29th Place
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,917
Initial cost to company, Land	10,211
Initial cost to company, Buildings and Improvements	18,863
Cost Capitalized Subsequent to Acquisition	11,222
Gross amount at which carried at close of period, Land	10,225
Gross amount at which carried at close of period, Buildings and Improvements	30,071
Gross amount at which carried at close of period, Total	40,296
Accumulated Depreciation and Amortization	7,323
Life on which depreciation in latest income statements is computed	35 years
Andorra
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	2,432
Initial cost to company, Buildings and Improvements	12,346
Cost Capitalized Subsequent to Acquisition	10,875
Gross amount at which carried at close of period, Land	2,432
Gross amount at which carried at close of period, Buildings and Improvements	23,221
Gross amount at which carried at close of period, Total	25,653
Accumulated Depreciation and Amortization	17,090
Life on which depreciation in latest income statements is computed	35 years
Assembly Row/Assembly Square Market Place
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	93,252
Initial cost to company, Buildings and Improvements	34,196
Cost Capitalized Subsequent to Acquisition	305,854
Gross amount at which carried at close of period, Land	93,252
Gross amount at which carried at close of period, Buildings and Improvements	340,050
Gross amount at which carried at close of period, Total	433,302
Accumulated Depreciation and Amortization	21,953
Life on which depreciation in latest income statements is computed	35 years
The Avenue at White Marsh
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	52,705
Initial cost to company, Land	20,682
Initial cost to company, Buildings and Improvements	72,432
Cost Capitalized Subsequent to Acquisition	4,514
Gross amount at which carried at close of period, Land	20,685
Gross amount at which carried at close of period, Buildings and Improvements	76,943
Gross amount at which carried at close of period, Total	97,628
Accumulated Depreciation and Amortization	22,282
Life on which depreciation in latest income statements is computed	35 years
Bala Cynwyd
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,565
Initial cost to company, Buildings and Improvements	14,466
Cost Capitalized Subsequent to Acquisition	22,187
Gross amount at which carried at close of period, Land	3,566
Gross amount at which carried at close of period, Buildings and Improvements	36,652
Gross amount at which carried at close of period, Total	40,218
Accumulated Depreciation and Amortization	16,281
Life on which depreciation in latest income statements is computed	35 years
Barracks Road
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	35,985
Initial cost to company, Land	4,363
Initial cost to company, Buildings and Improvements	16,459
Cost Capitalized Subsequent to Acquisition	39,643
Gross amount at which carried at close of period, Land	4,363
Gross amount at which carried at close of period, Buildings and Improvements	56,102
Gross amount at which carried at close of period, Total	60,465
Accumulated Depreciation and Amortization	37,539
Life on which depreciation in latest income statements is computed	35 years
Bethesda Row
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	46,579
Initial cost to company, Buildings and Improvements	35,406
Cost Capitalized Subsequent to Acquisition	141,226
Gross amount at which carried at close of period, Land	44,880
Gross amount at which carried at close of period, Buildings and Improvements	178,331
Gross amount at which carried at close of period, Total	223,211
Accumulated Depreciation and Amortization	56,776
Bethesda Row | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statements is computed	35 years
Bethesda Row | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statements is computed	50 years
Brick Plaza
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	26,415
Initial cost to company, Land	0
Initial cost to company, Buildings and Improvements	24,715
Cost Capitalized Subsequent to Acquisition	35,770
Gross amount at which carried at close of period, Land	3,944
Gross amount at which carried at close of period, Buildings and Improvements	56,541
Gross amount at which carried at close of period, Total	60,485
Accumulated Depreciation and Amortization	42,119
Life on which depreciation in latest income statements is computed	35 years
Bristol Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,856
Initial cost to company, Buildings and Improvements	15,959
Cost Capitalized Subsequent to Acquisition	9,602
Gross amount at which carried at close of period, Land	3,856
Gross amount at which carried at close of period, Buildings and Improvements	25,561
Gross amount at which carried at close of period, Total	29,417
Accumulated Depreciation and Amortization	14,521
Life on which depreciation in latest income statements is computed	35 years
Brook 35
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,500
Initial cost to company, Land	7,128
Initial cost to company, Buildings and Improvements	38,355
Cost Capitalized Subsequent to Acquisition	573
Gross amount at which carried at close of period, Land	7,128
Gross amount at which carried at close of period, Buildings and Improvements	38,928
Gross amount at which carried at close of period, Total	46,056
Accumulated Depreciation and Amortization	1,312
Life on which depreciation in latest income statements is computed	35 years
Chelsea Commons
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,790
Initial cost to company, Land	9,417
Initial cost to company, Buildings and Improvements	19,466
Cost Capitalized Subsequent to Acquisition	13,825
Gross amount at which carried at close of period, Land	9,396
Gross amount at which carried at close of period, Buildings and Improvements	33,312
Gross amount at which carried at close of period, Total	42,708
Accumulated Depreciation and Amortization	5,484
Life on which depreciation in latest income statements is computed	35 years
Colorado Blvd
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	5,262
Initial cost to company, Buildings and Improvements	4,071
Cost Capitalized Subsequent to Acquisition	8,787
Gross amount at which carried at close of period, Land	5,262
Gross amount at which carried at close of period, Buildings and Improvements	12,858
Gross amount at which carried at close of period, Total	18,120
Accumulated Depreciation and Amortization	9,336
Life on which depreciation in latest income statements is computed	35 years
Congressional Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	2,793
Initial cost to company, Buildings and Improvements	7,424
Cost Capitalized Subsequent to Acquisition	69,801
Gross amount at which carried at close of period, Land	1,020
Gross amount at which carried at close of period, Buildings and Improvements	78,998
Gross amount at which carried at close of period, Total	80,018
Accumulated Depreciation and Amortization	47,425
Life on which depreciation in latest income statements is computed	35 years
Courthouse Center
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,750
Initial cost to company, Buildings and Improvements	1,869
Cost Capitalized Subsequent to Acquisition	1,142
Gross amount at which carried at close of period, Land	1,750
Gross amount at which carried at close of period, Buildings and Improvements	3,011
Gross amount at which carried at close of period, Total	4,761
Accumulated Depreciation and Amortization	1,589
Life on which depreciation in latest income statements is computed	35 years
Courtyard Shops
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	16,862
Initial cost to company, Buildings and Improvements	21,851
Cost Capitalized Subsequent to Acquisition	2,025
Gross amount at which carried at close of period, Land	16,894
Gross amount at which carried at close of period, Buildings and Improvements	23,844
Gross amount at which carried at close of period, Total	40,738
Accumulated Depreciation and Amortization	5,731
Life on which depreciation in latest income statements is computed	35 years
Crossroads
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	4,635
Initial cost to company, Buildings and Improvements	11,611
Cost Capitalized Subsequent to Acquisition	14,897
Gross amount at which carried at close of period, Land	4,635
Gross amount at which carried at close of period, Buildings and Improvements	26,508
Gross amount at which carried at close of period, Total	31,143
Accumulated Depreciation and Amortization	14,056
Life on which depreciation in latest income statements is computed	35 years
Crow Canyon Commons
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	27,245
Initial cost to company, Buildings and Improvements	54,575
Cost Capitalized Subsequent to Acquisition	4,915
Gross amount at which carried at close of period, Land	27,245
Gross amount at which carried at close of period, Buildings and Improvements	59,490
Gross amount at which carried at close of period, Total	86,735
Accumulated Depreciation and Amortization	15,878
Life on which depreciation in latest income statements is computed	35 years
Darien
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	29,809
Initial cost to company, Buildings and Improvements	18,302
Cost Capitalized Subsequent to Acquisition	21
Gross amount at which carried at close of period, Land	29,809
Gross amount at which carried at close of period, Buildings and Improvements	18,323
Gross amount at which carried at close of period, Total	48,132
Accumulated Depreciation and Amortization	1,134
Life on which depreciation in latest income statements is computed	35 years
Dedham Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	12,287
Initial cost to company, Buildings and Improvements	12,918
Cost Capitalized Subsequent to Acquisition	9,834
Gross amount at which carried at close of period, Land	12,287
Gross amount at which carried at close of period, Buildings and Improvements	22,752
Gross amount at which carried at close of period, Total	35,039
Accumulated Depreciation and Amortization	12,909
Life on which depreciation in latest income statements is computed	35 years
Del Mar Village
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	15,624
Initial cost to company, Buildings and Improvements	41,712
Cost Capitalized Subsequent to Acquisition	2,494
Gross amount at which carried at close of period, Land	15,587
Gross amount at which carried at close of period, Buildings and Improvements	44,243
Gross amount at which carried at close of period, Total	59,830
Accumulated Depreciation and Amortization	15,971
Life on which depreciation in latest income statements is computed	35 years
East Bay Bridge
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	29,079
Initial cost to company, Buildings and Improvements	138,035
Cost Capitalized Subsequent to Acquisition	1,395
Gross amount at which carried at close of period, Land	29,079
Gross amount at which carried at close of period, Buildings and Improvements	139,430
Gross amount at which carried at close of period, Total	168,509
Accumulated Depreciation and Amortization	9,604
Life on which depreciation in latest income statements is computed	35 years
Eastgate
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,608
Initial cost to company, Buildings and Improvements	5,775
Cost Capitalized Subsequent to Acquisition	20,329
Gross amount at which carried at close of period, Land	1,608
Gross amount at which carried at close of period, Buildings and Improvements	26,104
Gross amount at which carried at close of period, Total	27,712
Accumulated Depreciation and Amortization	17,343
Life on which depreciation in latest income statements is computed	35 years
Elllisburg
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	4,028
Initial cost to company, Buildings and Improvements	11,309
Cost Capitalized Subsequent to Acquisition	18,818
Gross amount at which carried at close of period, Land	4,013
Gross amount at which carried at close of period, Buildings and Improvements	30,142
Gross amount at which carried at close of period, Total	34,155
Accumulated Depreciation and Amortization	17,344
Life on which depreciation in latest income statements is computed	35 years
Escondido Promenade
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	19,117
Initial cost to company, Buildings and Improvements	15,829
Cost Capitalized Subsequent to Acquisition	12,118
Gross amount at which carried at close of period, Land	19,117
Gross amount at which carried at close of period, Buildings and Improvements	27,947
Gross amount at which carried at close of period, Total	47,064
Accumulated Depreciation and Amortization	12,034
Life on which depreciation in latest income statements is computed	35 years
Falls Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,798
Initial cost to company, Buildings and Improvements	1,270
Cost Capitalized Subsequent to Acquisition	9,787
Gross amount at which carried at close of period, Land	1,819
Gross amount at which carried at close of period, Buildings and Improvements	11,036
Gross amount at which carried at close of period, Total	12,855
Accumulated Depreciation and Amortization	7,607
Life on which depreciation in latest income statements is computed	25 years
Federal Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	10,216
Initial cost to company, Buildings and Improvements	17,895
Cost Capitalized Subsequent to Acquisition	37,699
Gross amount at which carried at close of period, Land	10,216
Gross amount at which carried at close of period, Buildings and Improvements	55,594
Gross amount at which carried at close of period, Total	65,810
Accumulated Depreciation and Amortization	37,299
Life on which depreciation in latest income statements is computed	35 years
Finley Square
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	9,252
Initial cost to company, Buildings and Improvements	9,544
Cost Capitalized Subsequent to Acquisition	13,829
Gross amount at which carried at close of period, Land	9,252
Gross amount at which carried at close of period, Buildings and Improvements	23,373
Gross amount at which carried at close of period, Total	32,625
Accumulated Depreciation and Amortization	16,607
Life on which depreciation in latest income statements is computed	35 years
Flourtown
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,345
Initial cost to company, Buildings and Improvements	3,943
Cost Capitalized Subsequent to Acquisition	9,010
Gross amount at which carried at close of period, Land	1,345
Gross amount at which carried at close of period, Buildings and Improvements	12,953
Gross amount at which carried at close of period, Total	14,298
Accumulated Depreciation and Amortization	4,490
Life on which depreciation in latest income statements is computed	35 years
Fresh Meadows
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	24,625
Initial cost to company, Buildings and Improvements	25,255
Cost Capitalized Subsequent to Acquisition	30,115
Gross amount at which carried at close of period, Land	24,633
Gross amount at which carried at close of period, Buildings and Improvements	55,362
Gross amount at which carried at close of period, Total	79,995
Accumulated Depreciation and Amortization	30,687
Life on which depreciation in latest income statements is computed	35 years
Friendship Center
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	12,696
Initial cost to company, Buildings and Improvements	20,803
Cost Capitalized Subsequent to Acquisition	3,999
Gross amount at which carried at close of period, Land	12,696
Gross amount at which carried at close of period, Buildings and Improvements	24,802
Gross amount at which carried at close of period, Total	37,498
Accumulated Depreciation and Amortization	8,889
Life on which depreciation in latest income statements is computed	35 years
Gaithersburg Square
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	7,701
Initial cost to company, Buildings and Improvements	5,271
Cost Capitalized Subsequent to Acquisition	12,810
Gross amount at which carried at close of period, Land	5,973
Gross amount at which carried at close of period, Buildings and Improvements	19,809
Gross amount at which carried at close of period, Total	25,782
Accumulated Depreciation and Amortization	15,980
Life on which depreciation in latest income statements is computed	35 years
Garden Market
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	2,677
Initial cost to company, Buildings and Improvements	4,829
Cost Capitalized Subsequent to Acquisition	5,181
Gross amount at which carried at close of period, Land	2,677
Gross amount at which carried at close of period, Buildings and Improvements	10,010
Gross amount at which carried at close of period, Total	12,687
Accumulated Depreciation and Amortization	6,111
Life on which depreciation in latest income statements is computed	35 years
Governor Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	2,068
Initial cost to company, Buildings and Improvements	4,905
Cost Capitalized Subsequent to Acquisition	19,744
Gross amount at which carried at close of period, Land	2,068
Gross amount at which carried at close of period, Buildings and Improvements	24,649
Gross amount at which carried at close of period, Total	26,717
Accumulated Depreciation and Amortization	17,018
Life on which depreciation in latest income statements is computed	35 years
Graham Park Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,237
Initial cost to company, Buildings and Improvements	15,096
Cost Capitalized Subsequent to Acquisition	17,536
Gross amount at which carried at close of period, Land	1,169
Gross amount at which carried at close of period, Buildings and Improvements	32,700
Gross amount at which carried at close of period, Total	33,869
Accumulated Depreciation and Amortization	24,764
Life on which depreciation in latest income statements is computed	35 years
Gratiot Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	525
Initial cost to company, Buildings and Improvements	1,601
Cost Capitalized Subsequent to Acquisition	17,092
Gross amount at which carried at close of period, Land	525
Gross amount at which carried at close of period, Buildings and Improvements	18,693
Gross amount at which carried at close of period, Total	19,218
Accumulated Depreciation and Amortization	15,431
Life on which depreciation in latest income statements is computed	25 years 9 months
Greenwich Avenue
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	7,484
Initial cost to company, Buildings and Improvements	5,444
Cost Capitalized Subsequent to Acquisition	1,041
Gross amount at which carried at close of period, Land	7,484
Gross amount at which carried at close of period, Buildings and Improvements	6,485
Gross amount at which carried at close of period, Total	13,969
Accumulated Depreciation and Amortization	3,590
Life on which depreciation in latest income statements is computed	35 years
Hauppauge
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	13,566
Initial cost to company, Land	8,791
Initial cost to company, Buildings and Improvements	15,262
Cost Capitalized Subsequent to Acquisition	4,060
Gross amount at which carried at close of period, Land	8,426
Gross amount at which carried at close of period, Buildings and Improvements	19,687
Gross amount at which carried at close of period, Total	28,113
Accumulated Depreciation and Amortization	9,591
Life on which depreciation in latest income statements is computed	35 years
Hermosa Avenue
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,116
Initial cost to company, Buildings and Improvements	280
Cost Capitalized Subsequent to Acquisition	4,485
Gross amount at which carried at close of period, Land	1,368
Gross amount at which carried at close of period, Buildings and Improvements	4,513
Gross amount at which carried at close of period, Total	5,881
Accumulated Depreciation and Amortization	2,365
Life on which depreciation in latest income statements is computed	35 years
Hollywood Blvd.
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	8,300
Initial cost to company, Buildings and Improvements	16,920
Cost Capitalized Subsequent to Acquisition	21,729
Gross amount at which carried at close of period, Land	8,300
Gross amount at which carried at close of period, Buildings and Improvements	38,649
Gross amount at which carried at close of period, Total	46,949
Accumulated Depreciation and Amortization	10,619
Life on which depreciation in latest income statements is computed	35 years
Houston Street
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	14,680
Initial cost to company, Buildings and Improvements	1,976
Cost Capitalized Subsequent to Acquisition	45,419
Gross amount at which carried at close of period, Land	14,778
Gross amount at which carried at close of period, Buildings and Improvements	47,297
Gross amount at which carried at close of period, Total	62,075
Accumulated Depreciation and Amortization	27,915
Life on which depreciation in latest income statements is computed	35 years
Huntington
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	11,713
Initial cost to company, Buildings and Improvements	16,008
Cost Capitalized Subsequent to Acquisition	16,042
Gross amount at which carried at close of period, Land	11,713
Gross amount at which carried at close of period, Buildings and Improvements	32,050
Gross amount at which carried at close of period, Total	43,763
Accumulated Depreciation and Amortization	12,121
Life on which depreciation in latest income statements is computed	35 years
Huntington Square
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	0
Initial cost to company, Buildings and Improvements	10,075
Cost Capitalized Subsequent to Acquisition	2,307
Gross amount at which carried at close of period, Land	0
Gross amount at which carried at close of period, Buildings and Improvements	12,382
Gross amount at which carried at close of period, Total	12,382
Accumulated Depreciation and Amortization	1,717
Life on which depreciation in latest income statements is computed	35 years
Idylwood Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	4,308
Initial cost to company, Buildings and Improvements	10,026
Cost Capitalized Subsequent to Acquisition	2,390
Gross amount at which carried at close of period, Land	4,308
Gross amount at which carried at close of period, Buildings and Improvements	12,416
Gross amount at which carried at close of period, Total	16,724
Accumulated Depreciation and Amortization	7,553
Life on which depreciation in latest income statements is computed	35 years
Kings Court
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	0
Initial cost to company, Buildings and Improvements	10,714
Cost Capitalized Subsequent to Acquisition	894
Gross amount at which carried at close of period, Land	0
Gross amount at which carried at close of period, Buildings and Improvements	11,608
Gross amount at which carried at close of period, Total	11,608
Accumulated Depreciation and Amortization	7,429
Life on which depreciation in latest income statements is computed	26 years
Lancaster
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,907
Initial cost to company, Land	0
Initial cost to company, Buildings and Improvements	2,103
Cost Capitalized Subsequent to Acquisition	11,441
Gross amount at which carried at close of period, Land	75
Gross amount at which carried at close of period, Buildings and Improvements	13,469
Gross amount at which carried at close of period, Total	13,544
Accumulated Depreciation and Amortization	7,341
Life on which depreciation in latest income statements is computed	22 years
Langhorne Square
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	720
Initial cost to company, Buildings and Improvements	2,974
Cost Capitalized Subsequent to Acquisition	18,082
Gross amount at which carried at close of period, Land	720
Gross amount at which carried at close of period, Buildings and Improvements	21,056
Gross amount at which carried at close of period, Total	21,776
Accumulated Depreciation and Amortization	12,997
Life on which depreciation in latest income statements is computed	35 years
Laurel
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	7,458
Initial cost to company, Buildings and Improvements	22,525
Cost Capitalized Subsequent to Acquisition	22,974
Gross amount at which carried at close of period, Land	7,464
Gross amount at which carried at close of period, Buildings and Improvements	45,493
Gross amount at which carried at close of period, Total	52,957
Accumulated Depreciation and Amortization	32,934
Life on which depreciation in latest income statements is computed	35 years
Lawrence Park
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	25,507
Initial cost to company, Land	5,723
Initial cost to company, Buildings and Improvements	7,160
Cost Capitalized Subsequent to Acquisition	19,078
Gross amount at which carried at close of period, Land	5,734
Gross amount at which carried at close of period, Buildings and Improvements	26,227
Gross amount at which carried at close of period, Total	31,961
Accumulated Depreciation and Amortization	23,109
Life on which depreciation in latest income statements is computed	22 years
Leesburg Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	8,184
Initial cost to company, Buildings and Improvements	10,722
Cost Capitalized Subsequent to Acquisition	16,729
Gross amount at which carried at close of period, Land	8,184
Gross amount at which carried at close of period, Buildings and Improvements	27,451
Gross amount at which carried at close of period, Total	35,635
Accumulated Depreciation and Amortization	12,093
Life on which depreciation in latest income statements is computed	35 years
Linden Square
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	79,382
Initial cost to company, Buildings and Improvements	19,247
Cost Capitalized Subsequent to Acquisition	48,105
Gross amount at which carried at close of period, Land	79,269
Gross amount at which carried at close of period, Buildings and Improvements	67,465
Gross amount at which carried at close of period, Total	146,734
Accumulated Depreciation and Amortization	15,329
Life on which depreciation in latest income statements is computed	35 years
Melville Mall
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	35,622
Initial cost to company, Buildings and Improvements	32,882
Cost Capitalized Subsequent to Acquisition	1,401
Gross amount at which carried at close of period, Land	35,622
Gross amount at which carried at close of period, Buildings and Improvements	34,283
Gross amount at which carried at close of period, Total	69,905
Accumulated Depreciation and Amortization	7,968
Life on which depreciation in latest income statements is computed	35 years
Mercer Mall
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	55,741
Initial cost to company, Land	28,684
Initial cost to company, Buildings and Improvements	48,028
Cost Capitalized Subsequent to Acquisition	39,012
Gross amount at which carried at close of period, Land	28,684
Gross amount at which carried at close of period, Buildings and Improvements	87,040
Gross amount at which carried at close of period, Total	115,724
Accumulated Depreciation and Amortization	30,786
Mercer Mall | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statements is computed	25 years
Mercer Mall | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statements is computed	35 years
Montrose Crossing
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	75,867
Initial cost to company, Land	48,624
Initial cost to company, Buildings and Improvements	91,819
Cost Capitalized Subsequent to Acquisition	12,663
Gross amount at which carried at close of period, Land	48,624
Gross amount at which carried at close of period, Buildings and Improvements	104,482
Gross amount at which carried at close of period, Total	153,106
Accumulated Depreciation and Amortization	12,524
Life on which depreciation in latest income statements is computed	35 years
Mount Vernon/South Valley/7770 Richmond Hwy,
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	10,068
Initial cost to company, Buildings and Improvements	33,501
Cost Capitalized Subsequent to Acquisition	38,701
Gross amount at which carried at close of period, Land	10,230
Gross amount at which carried at close of period, Buildings and Improvements	72,040
Gross amount at which carried at close of period, Total	82,270
Accumulated Depreciation and Amortization	25,865
Life on which depreciation in latest income statements is computed	35 years
Town Center of New Britain
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,282
Initial cost to company, Buildings and Improvements	12,285
Cost Capitalized Subsequent to Acquisition	1,064
Gross amount at which carried at close of period, Land	1,341
Gross amount at which carried at close of period, Buildings and Improvements	13,290
Gross amount at which carried at close of period, Total	14,631
Accumulated Depreciation and Amortization	3,752
Life on which depreciation in latest income statements is computed	35 years
North Dartmouth
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	9,366
Initial cost to company, Buildings and Improvements	0
Cost Capitalized Subsequent to Acquisition	2
Gross amount at which carried at close of period, Land	9,366
Gross amount at which carried at close of period, Buildings and Improvements	2
Gross amount at which carried at close of period, Total	9,368
Accumulated Depreciation and Amortization	2
Life on which depreciation in latest income statements is computed
Northeast
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,152
Initial cost to company, Buildings and Improvements	10,596
Cost Capitalized Subsequent to Acquisition	13,116
Gross amount at which carried at close of period, Land	1,153
Gross amount at which carried at close of period, Buildings and Improvements	23,711
Gross amount at which carried at close of period, Total	24,864
Accumulated Depreciation and Amortization	18,127
Life on which depreciation in latest income statements is computed	35 years
North Lake Commons
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	2,782
Initial cost to company, Buildings and Improvements	8,604
Cost Capitalized Subsequent to Acquisition	5,184
Gross amount at which carried at close of period, Land	2,628
Gross amount at which carried at close of period, Buildings and Improvements	13,942
Gross amount at which carried at close of period, Total	16,570
Accumulated Depreciation and Amortization	7,064
Life on which depreciation in latest income statements is computed	35 years
Old Keene Mill
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	638
Initial cost to company, Buildings and Improvements	998
Cost Capitalized Subsequent to Acquisition	4,744
Gross amount at which carried at close of period, Land	638
Gross amount at which carried at close of period, Buildings and Improvements	5,742
Gross amount at which carried at close of period, Total	6,380
Accumulated Depreciation and Amortization	4,870
Life on which depreciation in latest income statements is computed	33 years 4 months
Old Town Center
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,420
Initial cost to company, Buildings and Improvements	2,765
Cost Capitalized Subsequent to Acquisition	31,637
Gross amount at which carried at close of period, Land	3,420
Gross amount at which carried at close of period, Buildings and Improvements	34,402
Gross amount at which carried at close of period, Total	37,822
Accumulated Depreciation and Amortization	19,398
Life on which depreciation in latest income statements is computed	35 years
Pan Am Shopping Center
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	8,694
Initial cost to company, Buildings and Improvements	12,929
Cost Capitalized Subsequent to Acquisition	7,178
Gross amount at which carried at close of period, Land	8,695
Gross amount at which carried at close of period, Buildings and Improvements	20,106
Gross amount at which carried at close of period, Total	28,801
Accumulated Depreciation and Amortization	13,321
Life on which depreciation in latest income statements is computed	35 years
Pentagon Row
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	0
Initial cost to company, Buildings and Improvements	2,955
Cost Capitalized Subsequent to Acquisition	95,525
Gross amount at which carried at close of period, Land	0
Gross amount at which carried at close of period, Buildings and Improvements	98,480
Gross amount at which carried at close of period, Total	98,480
Accumulated Depreciation and Amortization	39,074
Life on which depreciation in latest income statements is computed	35 years
Perring Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	2,800
Initial cost to company, Buildings and Improvements	6,461
Cost Capitalized Subsequent to Acquisition	20,575
Gross amount at which carried at close of period, Land	2,800
Gross amount at which carried at close of period, Buildings and Improvements	27,036
Gross amount at which carried at close of period, Total	29,836
Accumulated Depreciation and Amortization	20,605
Life on which depreciation in latest income statements is computed	35 years
Pike & Rose
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	31,471
Initial cost to company, Buildings and Improvements	10,335
Cost Capitalized Subsequent to Acquisition	240,995
Gross amount at which carried at close of period, Land	26,201
Gross amount at which carried at close of period, Buildings and Improvements	256,600
Gross amount at which carried at close of period, Total	282,801
Accumulated Depreciation and Amortization	1,326
Life on which depreciation in latest income statements is computed	50 years
Pike 7
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	9,709
Initial cost to company, Buildings and Improvements	22,799
Cost Capitalized Subsequent to Acquisition	3,720
Gross amount at which carried at close of period, Land	9,653
Gross amount at which carried at close of period, Buildings and Improvements	26,575
Gross amount at which carried at close of period, Total	36,228
Accumulated Depreciation and Amortization	14,025
Life on which depreciation in latest income statements is computed	35 years
Plaza El Segundo
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	180,269
Initial cost to company, Land	62,127
Initial cost to company, Buildings and Improvements	153,556
Cost Capitalized Subsequent to Acquisition	36,876
Gross amount at which carried at close of period, Land	62,127
Gross amount at which carried at close of period, Buildings and Improvements	190,432
Gross amount at which carried at close of period, Total	252,559
Accumulated Depreciation and Amortization	18,186
Life on which depreciation in latest income statements is computed	35 years
Queen Anne Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,319
Initial cost to company, Buildings and Improvements	8,457
Cost Capitalized Subsequent to Acquisition	6,274
Gross amount at which carried at close of period, Land	3,319
Gross amount at which carried at close of period, Buildings and Improvements	14,731
Gross amount at which carried at close of period, Total	18,050
Accumulated Depreciation and Amortization	8,433
Life on which depreciation in latest income statements is computed	35 years
Quince Orchard Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,197
Initial cost to company, Buildings and Improvements	7,949
Cost Capitalized Subsequent to Acquisition	21,878
Gross amount at which carried at close of period, Land	2,928
Gross amount at which carried at close of period, Buildings and Improvements	30,096
Gross amount at which carried at close of period, Total	33,024
Accumulated Depreciation and Amortization	14,462
Life on which depreciation in latest income statements is computed	35 years
Rockville Town Square
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	4,508
Initial cost to company, Land	0
Initial cost to company, Buildings and Improvements	8,092
Cost Capitalized Subsequent to Acquisition	41,858
Gross amount at which carried at close of period, Land	0
Gross amount at which carried at close of period, Buildings and Improvements	49,950
Gross amount at which carried at close of period, Total	49,950
Accumulated Depreciation and Amortization	11,727
Life on which depreciation in latest income statements is computed	50 years
Rollingwood Apts.
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	22,130
Initial cost to company, Land	552
Initial cost to company, Buildings and Improvements	2,246
Cost Capitalized Subsequent to Acquisition	7,046
Gross amount at which carried at close of period, Land	572
Gross amount at which carried at close of period, Buildings and Improvements	9,272
Gross amount at which carried at close of period, Total	9,844
Accumulated Depreciation and Amortization	8,189
Life on which depreciation in latest income statements is computed	25 years
Sam's Park and Shop
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	4,840
Initial cost to company, Buildings and Improvements	6,319
Cost Capitalized Subsequent to Acquisition	1,338
Gross amount at which carried at close of period, Land	4,840
Gross amount at which carried at close of period, Buildings and Improvements	7,657
Gross amount at which carried at close of period, Total	12,497
Accumulated Depreciation and Amortization	4,364
Life on which depreciation in latest income statements is computed	35 years
Santana Row
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	66,682
Initial cost to company, Buildings and Improvements	7,502
Cost Capitalized Subsequent to Acquisition	619,379
Gross amount at which carried at close of period, Land	57,574
Gross amount at which carried at close of period, Buildings and Improvements	635,989
Gross amount at which carried at close of period, Total	693,563
Accumulated Depreciation and Amortization	135,085
Santana Row | Minimum
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statements is computed	40 years
Santana Row | Maximum
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statements is computed	50 years
Saugus
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	4,383
Initial cost to company, Buildings and Improvements	8,291
Cost Capitalized Subsequent to Acquisition	2,227
Gross amount at which carried at close of period, Land	4,383
Gross amount at which carried at close of period, Buildings and Improvements	10,518
Gross amount at which carried at close of period, Total	14,901
Accumulated Depreciation and Amortization	5,436
Life on which depreciation in latest income statements is computed	35 years
Shirlington
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,491
Initial cost to company, Land	9,761
Initial cost to company, Buildings and Improvements	14,808
Cost Capitalized Subsequent to Acquisition	35,364
Gross amount at which carried at close of period, Land	4,234
Gross amount at which carried at close of period, Buildings and Improvements	55,699
Gross amount at which carried at close of period, Total	59,933
Accumulated Depreciation and Amortization	20,957
Life on which depreciation in latest income statements is computed	35 years
The Grove at Shrewsbury
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	59,633
Initial cost to company, Land	18,016
Initial cost to company, Buildings and Improvements	103,115
Cost Capitalized Subsequent to Acquisition	406
Gross amount at which carried at close of period, Land	18,016
Gross amount at which carried at close of period, Buildings and Improvements	103,521
Gross amount at which carried at close of period, Total	121,537
Accumulated Depreciation and Amortization	3,507
Life on which depreciation in latest income statements is computed	35 years
The Shoppes At Nottingham Square
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	4,441
Initial cost to company, Buildings and Improvements	12,849
Cost Capitalized Subsequent to Acquisition	148
Gross amount at which carried at close of period, Land	4,441
Gross amount at which carried at close of period, Buildings and Improvements	12,997
Gross amount at which carried at close of period, Total	17,438
Accumulated Depreciation and Amortization	3,515
Life on which depreciation in latest income statements is computed	35 years
Third Street Promenade
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	22,645
Initial cost to company, Buildings and Improvements	12,709
Cost Capitalized Subsequent to Acquisition	42,994
Gross amount at which carried at close of period, Land	25,125
Gross amount at which carried at close of period, Buildings and Improvements	53,223
Gross amount at which carried at close of period, Total	78,348
Accumulated Depreciation and Amortization	28,315
Life on which depreciation in latest income statements is computed	35 years
Tower
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	7,170
Initial cost to company, Buildings and Improvements	10,518
Cost Capitalized Subsequent to Acquisition	3,715
Gross amount at which carried at close of period, Land	7,280
Gross amount at which carried at close of period, Buildings and Improvements	14,123
Gross amount at which carried at close of period, Total	21,403
Accumulated Depreciation and Amortization	7,396
Life on which depreciation in latest income statements is computed	35 years
Tower Shops
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	29,940
Initial cost to company, Buildings and Improvements	43,390
Cost Capitalized Subsequent to Acquisition	10,594
Gross amount at which carried at close of period, Land	29,962
Gross amount at which carried at close of period, Buildings and Improvements	53,962
Gross amount at which carried at close of period, Total	83,924
Accumulated Depreciation and Amortization	8,425
Life on which depreciation in latest income statements is computed	35 years
Troy
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,126
Initial cost to company, Buildings and Improvements	5,193
Cost Capitalized Subsequent to Acquisition	21,653
Gross amount at which carried at close of period, Land	4,028
Gross amount at which carried at close of period, Buildings and Improvements	25,944
Gross amount at which carried at close of period, Total	29,972
Accumulated Depreciation and Amortization	18,843
Life on which depreciation in latest income statements is computed	22 years
Tyson's Station
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	388
Initial cost to company, Buildings and Improvements	453
Cost Capitalized Subsequent to Acquisition	3,679
Gross amount at which carried at close of period, Land	475
Gross amount at which carried at close of period, Buildings and Improvements	4,045
Gross amount at which carried at close of period, Total	4,520
Accumulated Depreciation and Amortization	3,277
Life on which depreciation in latest income statements is computed	17 years
Westgate Center
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	6,319
Initial cost to company, Buildings and Improvements	107,284
Cost Capitalized Subsequent to Acquisition	28,278
Gross amount at which carried at close of period, Land	6,319
Gross amount at which carried at close of period, Buildings and Improvements	135,562
Gross amount at which carried at close of period, Total	141,881
Accumulated Depreciation and Amortization	31,731
Life on which depreciation in latest income statements is computed	35 years
White Marsh Plaza
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,478
Initial cost to company, Buildings and Improvements	21,413
Cost Capitalized Subsequent to Acquisition	248
Gross amount at which carried at close of period, Land	3,478
Gross amount at which carried at close of period, Buildings and Improvements	21,661
Gross amount at which carried at close of period, Total	25,139
Accumulated Depreciation and Amortization	6,307
Life on which depreciation in latest income statements is computed	35 years
White Marsh Other
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	34,281
Initial cost to company, Buildings and Improvements	1,843
Cost Capitalized Subsequent to Acquisition	402
Gross amount at which carried at close of period, Land	34,311
Gross amount at which carried at close of period, Buildings and Improvements	2,215
Gross amount at which carried at close of period, Total	36,526
Accumulated Depreciation and Amortization	591
Life on which depreciation in latest income statements is computed	35 years
Wildwood
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	22,420
Initial cost to company, Land	9,111
Initial cost to company, Buildings and Improvements	1,061
Cost Capitalized Subsequent to Acquisition	8,354
Gross amount at which carried at close of period, Land	9,111
Gross amount at which carried at close of period, Buildings and Improvements	9,415
Gross amount at which carried at close of period, Total	18,526
Accumulated Depreciation and Amortization	7,946
Life on which depreciation in latest income statements is computed	33 years 4 months
Willow Grove
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	1,499
Initial cost to company, Buildings and Improvements	6,643
Cost Capitalized Subsequent to Acquisition	21,819
Gross amount at which carried at close of period, Land	1,499
Gross amount at which carried at close of period, Buildings and Improvements	28,462
Gross amount at which carried at close of period, Total	29,961
Accumulated Depreciation and Amortization	23,185
Life on which depreciation in latest income statements is computed	35 years
Willow Lawn
Real Estate and Accumulated Depreciation [Line Items]
Initial cost to company, Land	3,192
Initial cost to company, Buildings and Improvements	7,723
Cost Capitalized Subsequent to Acquisition	73,143
Gross amount at which carried at close of period, Land	7,790
Gross amount at which carried at close of period, Buildings and Improvements	76,268
Gross amount at which carried at close of period, Total	84,058
Accumulated Depreciation and Amortization	48,754
Life on which depreciation in latest income statements is computed	35 years
Wynnewood
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	25,994
Initial cost to company, Land	8,055
Initial cost to company, Buildings and Improvements	13,759
Cost Capitalized Subsequent to Acquisition	18,808
Gross amount at which carried at close of period, Land	8,055
Gross amount at which carried at close of period, Buildings and Improvements	32,567
Gross amount at which carried at close of period, Total	40,622
Accumulated Depreciation and Amortization	$ 18,729
Life on which depreciation in latest income statements is computed	35 years