SEC Schedule III Real Estate (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Real Estate And Accumulated Depreciation [Line Items]
Property Plant And Equipment Useful Life	40 years
New York 1290 Avenue Of Americas [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	$ 950,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	515,539
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	923,653
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	113,956
Real Estate And Accumulated Depreciation Carrying Amount Of Land	515,539
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,037,609
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,553,148
Real Estate And Accumulated Depreciation Accumulated Depreciation	177,161
Real Estate And Accumulated Depreciation Year Of Construction	1963
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York 350 Park Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	300,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	265,889
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	363,381
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	34,075
Real Estate And Accumulated Depreciation Carrying Amount Of Land	265,889
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	397,456
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	663,345
Real Estate And Accumulated Depreciation Accumulated Depreciation	70,876
Real Estate And Accumulated Depreciation Year Of Construction	1960
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
New York Office 666 Fifth Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	390,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	189,005
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	471,072
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	189,005
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	471,072
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	660,077
Real Estate And Accumulated Depreciation Accumulated Depreciation	13,011
Real Estate And Accumulated Depreciation Year Of Acquisition	2012
New York Office One Penn Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	412,169
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	181,159
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	593,328
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	593,328
Real Estate And Accumulated Depreciation Accumulated Depreciation	227,919
Real Estate And Accumulated Depreciation Year Of Construction	1972
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 100 West 33rd Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	223,242
Real Estate And Accumulated Depreciation Initial Cost Of Land	242,776
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	247,970
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	12,661
Real Estate And Accumulated Depreciation Carrying Amount Of Land	242,776
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	260,631
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	503,407
Real Estate And Accumulated Depreciation Accumulated Depreciation	44,717
Real Estate And Accumulated Depreciation Year Of Construction	1911
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Office 1540 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	105,914
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	214,208
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	25,955
Real Estate And Accumulated Depreciation Carrying Amount Of Land	105,914
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	240,163
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	346,077
Real Estate And Accumulated Depreciation Accumulated Depreciation	28,847
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
New York 655 Fifth Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	102,594
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	231,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	102,594
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	231,903
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	334,497
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,461
Real Estate And Accumulated Depreciation Year Of Acquisition	2013
New York Office Two Penn Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	425,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	53,615
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	164,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	84,924
Real Estate And Accumulated Depreciation Carrying Amount Of Land	52,689
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	250,753
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	303,442
Real Estate And Accumulated Depreciation Accumulated Depreciation	117,909
Real Estate And Accumulated Depreciation Year Of Construction	1968
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office 1535 Broadway Marriott Marquis [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	249,285
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	42,816
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	292,101
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	292,101
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2012
New York Office Manhattan Mall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	101,758
Real Estate And Accumulated Depreciation Initial Cost Of Land	88,595
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	113,473
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	72,225
Real Estate And Accumulated Depreciation Carrying Amount Of Land	88,595
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	185,698
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	274,293
Real Estate And Accumulated Depreciation Accumulated Depreciation	38,089
Real Estate And Accumulated Depreciation Year Of Construction	2009
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Office 770 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	353,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	52,898
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	95,686
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	90,361
Real Estate And Accumulated Depreciation Carrying Amount Of Land	52,898
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	186,047
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	238,945
Real Estate And Accumulated Depreciation Accumulated Depreciation	73,059
Real Estate And Accumulated Depreciation Year Of Construction	1907
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 90 Park Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	175,890
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	40,927
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	216,817
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	224,817
Real Estate And Accumulated Depreciation Accumulated Depreciation	90,125
Real Estate And Accumulated Depreciation Year Of Construction	1964
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office 888 Seventh Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	318,554
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	117,269
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	105,383
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	222,652
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	222,652
Real Estate And Accumulated Depreciation Accumulated Depreciation	90,120
Real Estate And Accumulated Depreciation Year Of Construction	1980
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 640 Fifth Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	38,224
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	25,992
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	113,404
Real Estate And Accumulated Depreciation Carrying Amount Of Land	38,224
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	139,396
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	177,620
Real Estate And Accumulated Depreciation Accumulated Depreciation	62,664
Real Estate And Accumulated Depreciation Year Of Construction	1950
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office Eleven Penn Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	450,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	40,333
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	85,259
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	61,146
Real Estate And Accumulated Depreciation Carrying Amount Of Land	40,333
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	146,405
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	186,738
Real Estate And Accumulated Depreciation Accumulated Depreciation	62,040
Real Estate And Accumulated Depreciation Year Of Construction	1923
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office 1740 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	26,971
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	102,890
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	38,868
Real Estate And Accumulated Depreciation Carrying Amount Of Land	26,971
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	141,758
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	168,729
Real Estate And Accumulated Depreciation Accumulated Depreciation	56,364
Real Estate And Accumulated Depreciation Year Of Construction	1950
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office 909 Third Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	194,910
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	120,723
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	85,724
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	206,447
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	206,447
Real Estate And Accumulated Depreciation Accumulated Depreciation	62,044
Real Estate And Accumulated Depreciation Year Of Construction	1969
Real Estate And Accumulated Depreciation Year Of Acquisition	1999
New York Office 150 East 58th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	39,303
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	80,216
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	31,394
Real Estate And Accumulated Depreciation Carrying Amount Of Land	39,303
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	111,610
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	150,913
Real Estate And Accumulated Depreciation Accumulated Depreciation	45,234
Real Estate And Accumulated Depreciation Year Of Construction	1969
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 595 Madison Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	62,731
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	62,888
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	19,656
Real Estate And Accumulated Depreciation Carrying Amount Of Land	62,731
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	82,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	145,275
Real Estate And Accumulated Depreciation Accumulated Depreciation	28,720
Real Estate And Accumulated Depreciation Year Of Construction	1968
Real Estate And Accumulated Depreciation Year Of Acquisition	1999
New York Office 828 To 850 Madison Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	80,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	107,937
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	28,261
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10
Real Estate And Accumulated Depreciation Carrying Amount Of Land	107,937
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	28,271
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	136,208
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,124
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
New York Office 4 Union Square South [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	120,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	24,079
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	55,220
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,233
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,079
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	57,453
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	81,532
Real Estate And Accumulated Depreciation Accumulated Depreciation	13,383
Real Estate And Accumulated Depreciation Year Of Construction	1965/2004
Real Estate And Accumulated Depreciation Year Of Acquisition	1993
New York Office 510 5th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	30,740
Real Estate And Accumulated Depreciation Initial Cost Of Land	34,602
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	18,728
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	18,737
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,602
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	37,465
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	72,067
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,269
Real Estate And Accumulated Depreciation Year Of Acquisition	2010
New York Office 478 To 482 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	20,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,375
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27,843
Real Estate And Accumulated Depreciation Carrying Amount Of Land	20,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	41,218
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	61,218
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,419
Real Estate And Accumulated Depreciation Year Of Construction	2009
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Office 20 Broad Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	28,760
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27,401
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	56,161
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	56,161
Real Estate And Accumulated Depreciation Accumulated Depreciation	18,774
Real Estate And Accumulated Depreciation Year Of Construction	1956
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 40 Fulton Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,732
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,388
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	12,411
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,732
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	38,799
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	54,531
Real Estate And Accumulated Depreciation Accumulated Depreciation	14,314
Real Estate And Accumulated Depreciation Year Of Construction	1987
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 443 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,187
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	41,186
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,187
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	41,186
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	52,373
Real Estate And Accumulated Depreciation Accumulated Depreciation	608
Real Estate And Accumulated Depreciation Year Of Acquisition	2013
New York Office 40 East 66th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,616
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	34,635
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	121
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,616
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	34,756
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	48,372
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,957
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
New York Office 155 Spring Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	30,544
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,545
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	33,089
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	46,789
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,780
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Office 689 Fifth Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,721
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,237
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,721
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	23,683
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	43,404
Real Estate And Accumulated Depreciation Accumulated Depreciation	8,387
Real Estate And Accumulated Depreciation Year Of Construction	1925
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 435 7th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	98,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,893
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	19,091
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	43
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,893
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,134
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	39,027
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,480
Real Estate And Accumulated Depreciation Year Of Construction	2002
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office 3040 M Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,830
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	27,490
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,256
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,830
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	30,746
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	38,576
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,996
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
New York Office 692 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,053
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	22,908
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,388
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,053
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,296
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	32,349
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,369
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
New York Office 715 Lexington Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,903
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,903
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	26,903
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,864
Real Estate And Accumulated Depreciation Year Of Construction	1923
Real Estate And Accumulated Depreciation Year Of Acquisition	2001
New York Office 677 To 679 Madison Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,070
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,640
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	388
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,028
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	23,098
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,890
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
New York Office 484 To 486 Broadway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,688
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,054
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	11,742
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	21,742
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,432
Real Estate And Accumulated Depreciation Year Of Construction	2009
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Office 431 7th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	16,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,751
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	16,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,751
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,451
Real Estate And Accumulated Depreciation Accumulated Depreciation	464
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Office 267 West 34th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,099
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,037
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,099
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,037
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,136
Real Estate And Accumulated Depreciation Accumulated Depreciation	42
Real Estate And Accumulated Depreciation Year Of Acquisition	2013
New York Office 330 West 34th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,599
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	13,610
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	22,209
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	22,209
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,764
Real Estate And Accumulated Depreciation Year Of Construction	1925
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
New York Office 1135 Third Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,844
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,844
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,173
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,844
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	12,017
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,861
Real Estate And Accumulated Depreciation Accumulated Depreciation	33
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office 1540 Broadway Garage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,086
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,914
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,086
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,914
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,000
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,687
Real Estate And Accumulated Depreciation Year Of Construction	1990
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
New York Office 966 Third Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,869
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,631
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,869
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,631
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,500
Real Estate And Accumulated Depreciation Accumulated Depreciation	30
Real Estate And Accumulated Depreciation Year Of Acquisition	2013
New York Office 148 Spring Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,112
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	374
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,486
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,686
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,159
Real Estate And Accumulated Depreciation Year Of Acquisition	2008
New York Office 150 Spring Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,822
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	192
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,014
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,214
Real Estate And Accumulated Depreciation Accumulated Depreciation	860
Real Estate And Accumulated Depreciation Year Of Acquisition	2008
New York Office 334 Canal Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,693
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,507
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,815
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,015
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,015
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2011
New York Office 488 8th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,650
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,767
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(4,671)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,862
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	884
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,746
Real Estate And Accumulated Depreciation Accumulated Depreciation	134
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Office 608 Fifth Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,572
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,572
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	10,572
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Construction	1932
Real Estate And Accumulated Depreciation Year Of Acquisition	2012
New York Office 484 8th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,856
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	762
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	299
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,856
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,061
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,917
Real Estate And Accumulated Depreciation Accumulated Depreciation	324
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office 825 7th Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,483
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	697
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	33
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,483
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	730
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,213
Real Estate And Accumulated Depreciation Accumulated Depreciation	302
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Office Other Primarily Signage [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,548
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	43,641
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	49,189
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	49,189
Real Estate And Accumulated Depreciation Accumulated Depreciation	9,669
New York Office Total [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	4,035,204
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,216,487
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,733,084
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,341,339
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,210,080
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,080,830
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,290,910
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,416,874
New York NJ Paramus [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27,673
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,033
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,640
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	27,673
Real Estate And Accumulated Depreciation Accumulated Depreciation	15,897
Real Estate And Accumulated Depreciation Year Of Construction	1967
Real Estate And Accumulated Depreciation Year Of Acquisition	1987
New York Other Properties Hotel Pennsylvania [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	29,903
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	121,712
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	78,876
Real Estate And Accumulated Depreciation Carrying Amount Of Land	29,903
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	200,588
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	230,491
Real Estate And Accumulated Depreciation Accumulated Depreciation	80,180
Real Estate And Accumulated Depreciation Year Of Construction	1919
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
New York Total [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	4,035,204
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,246,390
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,854,796
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,447,888
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,241,016
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,308,058
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,549,074
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,512,951
Washington DC Office 2011-2451 Crystal Drive [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	226,855
Real Estate And Accumulated Depreciation Initial Cost Of Land	100,935
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	409,920
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	132,550
Real Estate And Accumulated Depreciation Carrying Amount Of Land	100,228
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	543,177
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	643,405
Real Estate And Accumulated Depreciation Accumulated Depreciation	181,658
Real Estate And Accumulated Depreciation Year Of Construction	1984-1989
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 2001 Jefferson Davis Highway 2100 2200 Crystal Drive 223 23rd Street 2221 South Clark Street Crystal City Shops At 2100 And 220 20th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	72,579
Real Estate And Accumulated Depreciation Initial Cost Of Land	57,213
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	131,206
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	183,233
Real Estate And Accumulated Depreciation Carrying Amount Of Land	57,070
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	314,582
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	371,652
Real Estate And Accumulated Depreciation Accumulated Depreciation	73,439
Real Estate And Accumulated Depreciation Year Of Construction	1964-1969
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 1550-1750 Crystal Drive/ 241-251 18th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	112,987
Real Estate And Accumulated Depreciation Initial Cost Of Land	64,817
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	218,330
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	74,331
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,652
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	292,826
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	357,478
Real Estate And Accumulated Depreciation Accumulated Depreciation	90,441
Real Estate And Accumulated Depreciation Year Of Construction	1974-1980
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office River House Apartments [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	259,546
Real Estate And Accumulated Depreciation Initial Cost Of Land	118,421
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	125,078
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	64,211
Real Estate And Accumulated Depreciation Carrying Amount Of Land	138,696
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	169,014
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	307,710
Real Estate And Accumulated Depreciation Accumulated Depreciation	29,476
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Washington DC Office Skyline Place [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	458,569
Real Estate And Accumulated Depreciation Initial Cost Of Land	41,986
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	221,869
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	29,071
Real Estate And Accumulated Depreciation Carrying Amount Of Land	41,862
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	251,064
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	292,926
Real Estate And Accumulated Depreciation Accumulated Depreciation	78,373
Real Estate And Accumulated Depreciation Year Of Construction	1973-1984
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 1215, 1225 S. Clark Street/ 200, 201 12th Street S. [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	60,674
Real Estate And Accumulated Depreciation Initial Cost Of Land	47,594
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	177,373
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	32,917
Real Estate And Accumulated Depreciation Carrying Amount Of Land	47,465
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	210,419
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	257,884
Real Estate And Accumulated Depreciation Accumulated Depreciation	66,549
Real Estate And Accumulated Depreciation Year Of Construction	1983-1987
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 1800, 1851 And 1901 South Bell Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	37,551
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	118,806
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(9,349)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	37,551
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	109,457
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	147,008
Real Estate And Accumulated Depreciation Accumulated Depreciation	30,997
Real Estate And Accumulated Depreciation Year Of Construction	1968
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 2101 L Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	150,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	32,815
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	51,642
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	83,379
Real Estate And Accumulated Depreciation Carrying Amount Of Land	39,768
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	128,068
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	167,836
Real Estate And Accumulated Depreciation Accumulated Depreciation	26,103
Real Estate And Accumulated Depreciation Year Of Construction	1975
Real Estate And Accumulated Depreciation Year Of Acquisition	2003
Washington DC Office 1229-1231 25th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	101,671
Real Estate And Accumulated Depreciation Initial Cost Of Land	67,049
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,039
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	106,456
Real Estate And Accumulated Depreciation Carrying Amount Of Land	68,198
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	110,346
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	178,544
Real Estate And Accumulated Depreciation Accumulated Depreciation	11,499
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Washington DC Office 2200-2300 Clarendon Blvd [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	41,279
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	105,475
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	40,977
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	146,452
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	146,452
Real Estate And Accumulated Depreciation Accumulated Depreciation	47,179
Real Estate And Accumulated Depreciation Year Of Construction	1988-1989
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office Bowen Building 875 15th Street NW [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	115,022
Real Estate And Accumulated Depreciation Initial Cost Of Land	30,077
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	98,962
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,712
Real Estate And Accumulated Depreciation Carrying Amount Of Land	30,176
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	100,575
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	130,751
Real Estate And Accumulated Depreciation Accumulated Depreciation	21,759
Real Estate And Accumulated Depreciation Year Of Construction	2004
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Washington DC Office 1875 Connecticut Avenue NW [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	36,303
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	82,004
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,447
Real Estate And Accumulated Depreciation Carrying Amount Of Land	35,886
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	86,868
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	122,754
Real Estate And Accumulated Depreciation Accumulated Depreciation	18,030
Real Estate And Accumulated Depreciation Year Of Construction	1963
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Washington DC Office One Skyline Tower [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	139,536
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,266
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	75,343
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	35,222
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,231
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	110,600
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	122,831
Real Estate And Accumulated Depreciation Accumulated Depreciation	34,684
Real Estate And Accumulated Depreciation Year Of Construction	1988
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office H Street North 10 1 D Land Parcel [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	104,473
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	55
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(49,301)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	46,866
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,361
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	55,227
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Washington DC Office 1825 Connecticut Avenue NW [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	33,090
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	61,316
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(5,122)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	32,726
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	56,558
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	89,284
Real Estate And Accumulated Depreciation Accumulated Depreciation	11,695
Real Estate And Accumulated Depreciation Year Of Construction	1956
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Washington DC Office 1399 New York Avenue North West [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	33,481
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	67,363
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,236
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,178
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	70,902
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	105,080
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,880
Real Estate And Accumulated Depreciation Year Of Acquisition	2011
Washington DC Office Warehouses [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	106,946
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,326
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	26,591
Real Estate And Accumulated Depreciation Carrying Amount Of Land	82,897
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	51,966
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	134,863
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,237
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Washington DC Office Commerce Executive [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	13,401
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	58,705
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	14,473
Real Estate And Accumulated Depreciation Carrying Amount Of Land	13,140
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	73,439
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	86,579
Real Estate And Accumulated Depreciation Accumulated Depreciation	24,578
Real Estate And Accumulated Depreciation Year Of Construction	1985-1989
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 1235 Clark Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,826
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	53,894
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	17,221
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,826
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	71,115
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	86,941
Real Estate And Accumulated Depreciation Accumulated Depreciation	20,001
Real Estate And Accumulated Depreciation Year Of Construction	1981
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office Seven Skyline Place [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	104,419
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,292
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	58,351
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,210
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,262
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	60,591
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	70,853
Real Estate And Accumulated Depreciation Accumulated Depreciation	16,367
Real Estate And Accumulated Depreciation Year Of Construction	2001
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 1150 17th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	28,728
Real Estate And Accumulated Depreciation Initial Cost Of Land	23,359
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	24,876
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	15,276
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,723
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	38,788
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	63,511
Real Estate And Accumulated Depreciation Accumulated Depreciation	13,523
Real Estate And Accumulated Depreciation Year Of Construction	1970
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office Crystal City Hotel [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	8,000
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	47,191
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	8,993
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,000
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	56,184
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	64,184
Real Estate And Accumulated Depreciation Accumulated Depreciation	12,890
Real Estate And Accumulated Depreciation Year Of Construction	1968
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Washington DC Office 1750 Pennsylvania Avenue [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	20,020
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	30,032
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,410
Real Estate And Accumulated Depreciation Carrying Amount Of Land	21,170
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	34,292
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	55,462
Real Estate And Accumulated Depreciation Accumulated Depreciation	9,446
Real Estate And Accumulated Depreciation Year Of Construction	1964
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 1730 M Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	14,853
Real Estate And Accumulated Depreciation Initial Cost Of Land	10,095
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	17,541
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,867
Real Estate And Accumulated Depreciation Carrying Amount Of Land	10,687
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,816
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	37,503
Real Estate And Accumulated Depreciation Accumulated Depreciation	10,017
Real Estate And Accumulated Depreciation Year Of Construction	1963
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office Democracy Plaza I [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	33,628
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,772
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	36,400
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	36,400
Real Estate And Accumulated Depreciation Accumulated Depreciation	15,039
Real Estate And Accumulated Depreciation Year Of Construction	1987
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Washington DC Office 1726 M Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,450
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	22,062
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,588
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,455
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	25,645
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	35,100
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,270
Real Estate And Accumulated Depreciation Year Of Construction	1964
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Washington DC Office Crystal Drive Retail [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,465
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	5,753
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,218
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	26,218
Real Estate And Accumulated Depreciation Accumulated Depreciation	9,985
Real Estate And Accumulated Depreciation Year Of Construction	2004
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Washington DC Office 1109 South Capitol Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,541
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	178
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(205)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,597
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	(83)
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,514
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Washington DC Office South Capitol [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,009
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,273
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(2,078)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,204
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,204
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Washington DC Office H-Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,763
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	641
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	41
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,763
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	682
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,445
Real Estate And Accumulated Depreciation Accumulated Depreciation	143
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Washington DC Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	51,767
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(42,411)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,356
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,356
Real Estate And Accumulated Depreciation Accumulated Depreciation	45
Washington DC Office Total [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	1,886,718
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,052,773
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,376,711
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	796,471
Real Estate And Accumulated Depreciation Carrying Amount Of Land	997,073
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,228,882
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,225,955
Real Estate And Accumulated Depreciation Accumulated Depreciation	865,303
Retail CA Los Angeles Beverly Connection [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	72,996
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	131,510
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	25,162
Real Estate And Accumulated Depreciation Carrying Amount Of Land	72,995
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	156,673
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	229,668
Real Estate And Accumulated Depreciation Accumulated Depreciation	26,727
Real Estate And Accumulated Depreciation Year Of Construction	2008
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail CA Walnut Creek (1149 S. Main Street) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,699
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	19,930
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,699
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,930
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	22,629
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,088
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail CA Signal Hill [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,652
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,940
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,652
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,941
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,593
Real Estate And Accumulated Depreciation Accumulated Depreciation	533
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail CA Walnut Creek (1556 Mount Diablo Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,909
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,536
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,908
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,537
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,445
Real Estate And Accumulated Depreciation Accumulated Depreciation	73
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail CA Vallejo [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,945
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	221
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,166
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,166
Real Estate And Accumulated Depreciation Accumulated Depreciation	549
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail CA Colton (1904 Ranchero Ave) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,239
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	954
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,239
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	954
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,193
Real Estate And Accumulated Depreciation Accumulated Depreciation	225
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Retail CA Riverside (5571 Mission Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	209
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	704
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	209
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	704
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	913
Real Estate And Accumulated Depreciation Accumulated Depreciation	166
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Retail CA Total California [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	92,704
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	158,983
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	26,920
Real Estate And Accumulated Depreciation Carrying Amount Of Land	92,702
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	185,905
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	278,607
Real Estate And Accumulated Depreciation Accumulated Depreciation	32,361
Retail CT Waterbury [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	13,941
Real Estate And Accumulated Depreciation Initial Cost Of Land	667
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,504
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,111
Real Estate And Accumulated Depreciation Carrying Amount Of Land	667
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,615
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,282
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,746
Real Estate And Accumulated Depreciation Year Of Construction	1969
Real Estate And Accumulated Depreciation Year Of Acquisition	1969
Retail CT Newington [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	11,206
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,421
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,200
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	691
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,421
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,891
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,312
Real Estate And Accumulated Depreciation Accumulated Depreciation	720
Real Estate And Accumulated Depreciation Year Of Construction	1965
Real Estate And Accumulated Depreciation Year Of Acquisition	1965
Retail CT Total Connecticut [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	25,147
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,088
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,704
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,802
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,088
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,506
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,594
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,466
Retail IL Lansing [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,135
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,064
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	71
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,135
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,135
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,270
Real Estate And Accumulated Depreciation Accumulated Depreciation	205
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail IA Dubuque [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,479
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,479
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,479
Real Estate And Accumulated Depreciation Accumulated Depreciation	266
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail MD Rockville [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,470
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,599
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	93
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,470
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	20,692
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	24,162
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,559
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail MD Baltimore (Towson) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	15,581
Real Estate And Accumulated Depreciation Initial Cost Of Land	581
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,227
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	10,134
Real Estate And Accumulated Depreciation Carrying Amount Of Land	581
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,361
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,942
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,281
Real Estate And Accumulated Depreciation Year Of Construction	1968
Real Estate And Accumulated Depreciation Year Of Acquisition	1968
Retail MD Annapolis [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,652
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,705
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail MD Wheaton [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,367
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,367
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,367
Real Estate And Accumulated Depreciation Accumulated Depreciation	973
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail MD Glen Burnie [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	462
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,571
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,262
Real Estate And Accumulated Depreciation Carrying Amount Of Land	462
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,833
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,295
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,959
Real Estate And Accumulated Depreciation Year Of Construction	1958
Real Estate And Accumulated Depreciation Year Of Acquisition	1958
Retail MD Total Maryland [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	15,581
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,513
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	41,416
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	11,489
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,513
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	52,905
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	57,418
Real Estate And Accumulated Depreciation Accumulated Depreciation	16,477
Retail MA Springfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,713
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,797
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,471
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	592
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,797
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,063
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,860
Real Estate And Accumulated Depreciation Accumulated Depreciation	982
Real Estate And Accumulated Depreciation Year Of Construction	1993
Real Estate And Accumulated Depreciation Year Of Acquisition	1966
Retail MA Chicopee [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	8,282
Real Estate And Accumulated Depreciation Initial Cost Of Land	895
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	895
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	895
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Construction	1969
Real Estate And Accumulated Depreciation Year Of Acquisition	1969
Retail MA Cambridge [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	260
Real Estate And Accumulated Depreciation Accumulated Depreciation	149
Retail MA Total Massachusetts [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	13,995
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,692
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,471
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	852
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,692
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,323
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,015
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,131
Retail MI Roseville [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	30
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,128
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,461
Real Estate And Accumulated Depreciation Carrying Amount Of Land	30
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,589
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,619
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,223
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail MI Battle Creek [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,264
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,144
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(2,443)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	264
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	701
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	965
Real Estate And Accumulated Depreciation Accumulated Depreciation	127
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail MI Midland [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	133
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	133
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	133
Real Estate And Accumulated Depreciation Accumulated Depreciation	24
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail MI Total Michigan [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,294
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,405
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(982)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	294
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,423
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,717
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,374
Retail NH Salem [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,083
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,083
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	6,083
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail Bergen Town Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	300,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,884
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	81,723
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	372,514
Real Estate And Accumulated Depreciation Carrying Amount Of Land	37,635
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	436,486
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	474,121
Real Estate And Accumulated Depreciation Accumulated Depreciation	69,290
Real Estate And Accumulated Depreciation Year Of Construction	1957/2009
Real Estate And Accumulated Depreciation Year Of Acquisition	2003
Retail NJ North Bergen (Tonnelle Ave) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	75,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	24,493
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	63,816
Real Estate And Accumulated Depreciation Carrying Amount Of Land	31,806
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	56,503
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	88,309
Real Estate And Accumulated Depreciation Accumulated Depreciation	7,814
Real Estate And Accumulated Depreciation Year Of Construction	2009
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail NJ Union (Springfield Avenue) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	28,428
Real Estate And Accumulated Depreciation Initial Cost Of Land	19,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	45,090
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	19,700
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	45,090
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	64,790
Real Estate And Accumulated Depreciation Accumulated Depreciation	7,421
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NJ East Rutherford [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	13,558
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	36,727
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	60
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	36,787
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	36,787
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,582
Real Estate And Accumulated Depreciation Year Of Construction	2007
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NJ East Hanover I and II [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	42,696
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,232
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	18,241
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	11,224
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,671
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	29,026
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	31,697
Real Estate And Accumulated Depreciation Accumulated Depreciation	14,988
Real Estate And Accumulated Depreciation Year Of Construction	1962
Real Estate And Accumulated Depreciation Year Of Acquisition	1962/1998
Retail NJ Garfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	45
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	8,068
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	25,807
Real Estate And Accumulated Depreciation Carrying Amount Of Land	45
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	33,875
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	33,920
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,413
Real Estate And Accumulated Depreciation Year Of Construction	2009
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
Retail NJ Lodi (Washington Street) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	8,433
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,606
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,125
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,252
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,606
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	15,377
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	22,983
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,043
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Retail NJ Englewood [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	11,760
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,300
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	17,245
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(8,390)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,495
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,660
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,155
Real Estate And Accumulated Depreciation Accumulated Depreciation	285
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NJ Bricktown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	31,872
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,391
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	11,179
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	6,224
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,391
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	17,403
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	18,794
Real Estate And Accumulated Depreciation Accumulated Depreciation	11,699
Real Estate And Accumulated Depreciation Year Of Construction	1968
Real Estate And Accumulated Depreciation Year Of Acquisition	1968
Retail NJ Totowa [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	24,710
Real Estate And Accumulated Depreciation Initial Cost Of Land	120
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	11,994
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,561
Real Estate And Accumulated Depreciation Carrying Amount Of Land	120
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	16,555
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,675
Real Estate And Accumulated Depreciation Accumulated Depreciation	12,369
Real Estate And Accumulated Depreciation Year Of Construction	1957/1999
Real Estate And Accumulated Depreciation Year Of Acquisition	1957
Retail NJ Hazlet [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,400
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,413
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,400
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,413
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,813
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,549
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NJ Carlstadt [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	16,457
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	16,458
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	16,458
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,546
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NJ North Plainfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	500
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,983
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(5,785)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	500
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,198
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,698
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,709
Real Estate And Accumulated Depreciation Year Of Construction	1955
Real Estate And Accumulated Depreciation Year Of Acquisition	1989
Retail NJ East Brunswick II (339-341 Route 18 S.) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	11,754
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,098
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,949
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,938
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,098
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,887
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,985
Real Estate And Accumulated Depreciation Accumulated Depreciation	8,842
Real Estate And Accumulated Depreciation Year Of Construction	1972
Real Estate And Accumulated Depreciation Year Of Acquisition	1972
Retail NJ Manalapan [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	20,993
Real Estate And Accumulated Depreciation Initial Cost Of Land	725
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,189
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	4,924
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,046
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	11,792
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,838
Real Estate And Accumulated Depreciation Accumulated Depreciation	7,868
Real Estate And Accumulated Depreciation Year Of Construction	1971
Real Estate And Accumulated Depreciation Year Of Acquisition	1971
Retail NJ Marlton [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	17,221
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,611
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,464
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,961
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,454
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,582
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	15,036
Real Estate And Accumulated Depreciation Accumulated Depreciation	7,905
Real Estate And Accumulated Depreciation Year Of Construction	1973
Real Estate And Accumulated Depreciation Year Of Acquisition	1973
Retail NJ Union (Route 22 and Morris Ave) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	32,255
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,025
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,470
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,618
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,025
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	10,088
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,113
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,037
Real Estate And Accumulated Depreciation Year Of Construction	1962
Real Estate And Accumulated Depreciation Year Of Acquisition	1962
Retail NJ Hackensack [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	40,455
Real Estate And Accumulated Depreciation Initial Cost Of Land	692
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,219
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,911
Real Estate And Accumulated Depreciation Carrying Amount Of Land	692
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,130
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	13,822
Real Estate And Accumulated Depreciation Accumulated Depreciation	9,301
Real Estate And Accumulated Depreciation Year Of Construction	1963
Real Estate And Accumulated Depreciation Year Of Acquisition	1963
Retail NJ Wayne Towne Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,137
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	11,926
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	38,063
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	38,063
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,651
Real Estate And Accumulated Depreciation Year Of Acquisition	2010
Retail NJ Watchung [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	15,034
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,178
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,463
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,526
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,441
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,726
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,167
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,980
Real Estate And Accumulated Depreciation Year Of Construction	1994
Real Estate And Accumulated Depreciation Year Of Acquisition	1959
Retail NJ South Plainfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,112
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,044
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,562
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	11,606
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,606
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,825
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NJ Eatontown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,653
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,999
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	326
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,653
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,325
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,978
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,210
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail NJ Cherry Hill [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	13,831
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,864
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,694
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,821
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,864
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,515
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	12,379
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,807
Real Estate And Accumulated Depreciation Year Of Construction	1964
Real Estate And Accumulated Depreciation Year Of Acquisition	1964
Retail NJ Dover [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	13,121
Real Estate And Accumulated Depreciation Initial Cost Of Land	559
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,363
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,962
Real Estate And Accumulated Depreciation Carrying Amount Of Land	559
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,325
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,884
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,380
Real Estate And Accumulated Depreciation Year Of Construction	1964
Real Estate And Accumulated Depreciation Year Of Acquisition	1964
Retail NJ Lodi (Route 17 N.) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	11,316
Real Estate And Accumulated Depreciation Initial Cost Of Land	238
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	9,446
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	238
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	9,446
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	9,684
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,363
Real Estate And Accumulated Depreciation Year Of Construction	1999
Real Estate And Accumulated Depreciation Year Of Acquisition	1975
Retail NJ East Brunswick I (325-333 Route 18 S.) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	24,820
Real Estate And Accumulated Depreciation Initial Cost Of Land	319
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,220
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	586
Real Estate And Accumulated Depreciation Carrying Amount Of Land	319
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,806
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,125
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,712
Real Estate And Accumulated Depreciation Year Of Construction	1957
Real Estate And Accumulated Depreciation Year Of Acquisition	1957
Retail NJ Jersey City [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	20,227
Real Estate And Accumulated Depreciation Initial Cost Of Land	652
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,495
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	468
Real Estate And Accumulated Depreciation Carrying Amount Of Land	652
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,963
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,615
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,621
Real Estate And Accumulated Depreciation Year Of Construction	1965
Real Estate And Accumulated Depreciation Year Of Acquisition	1965
Retail NJ Morris Plains [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	21,321
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,104
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,411
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	915
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,104
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,326
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	8,430
Real Estate And Accumulated Depreciation Accumulated Depreciation	6,810
Real Estate And Accumulated Depreciation Year Of Construction	1961
Real Estate And Accumulated Depreciation Year Of Acquisition	1985
Retail NJ Middeltown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	17,330
Real Estate And Accumulated Depreciation Initial Cost Of Land	283
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,248
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,947
Real Estate And Accumulated Depreciation Carrying Amount Of Land	283
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,195
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,478
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,542
Real Estate And Accumulated Depreciation Year Of Construction	1963
Real Estate And Accumulated Depreciation Year Of Acquisition	1963
Retail NJ Woodbridge [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	20,610
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,509
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,675
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,867
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,539
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,512
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	6,051
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,600
Real Estate And Accumulated Depreciation Year Of Construction	1959
Real Estate And Accumulated Depreciation Year Of Acquisition	1959
Retail NJ Delran [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	756
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,468
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	724
Real Estate And Accumulated Depreciation Carrying Amount Of Land	756
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,192
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,948
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,192
Real Estate And Accumulated Depreciation Year Of Construction	1972
Real Estate And Accumulated Depreciation Year Of Acquisition	1972
Retail NJ Lawnside [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	10,660
Real Estate And Accumulated Depreciation Initial Cost Of Land	851
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,164
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,351
Real Estate And Accumulated Depreciation Carrying Amount Of Land	851
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,515
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,366
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,198
Real Estate And Accumulated Depreciation Year Of Construction	1969
Real Estate And Accumulated Depreciation Year Of Acquisition	1969
Retail NJ Kearny [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	309
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,376
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,211
Real Estate And Accumulated Depreciation Carrying Amount Of Land	309
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,587
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,896
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,530
Real Estate And Accumulated Depreciation Year Of Construction	1938
Real Estate And Accumulated Depreciation Year Of Acquisition	1959
Retail NJ Bordentown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	498
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,176
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,178
Real Estate And Accumulated Depreciation Carrying Amount Of Land	713
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,139
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,852
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,058
Real Estate And Accumulated Depreciation Year Of Construction	1958
Real Estate And Accumulated Depreciation Year Of Acquisition	1958
Retail NJ Turnersville [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	900
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,342
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,094
Real Estate And Accumulated Depreciation Carrying Amount Of Land	900
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,436
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,336
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,195
Real Estate And Accumulated Depreciation Year Of Construction	1974
Real Estate And Accumulated Depreciation Year Of Acquisition	1974
Retail NJ North Bergen (Kennedy Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,084
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,308
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	636
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	48
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,308
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	684
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,992
Real Estate And Accumulated Depreciation Accumulated Depreciation	458
Real Estate And Accumulated Depreciation Year Of Construction	1993
Real Estate And Accumulated Depreciation Year Of Acquisition	1959
Retail NJ Montclair [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	2,624
Real Estate And Accumulated Depreciation Initial Cost Of Land	66
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	419
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	381
Real Estate And Accumulated Depreciation Carrying Amount Of Land	66
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	800
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	866
Real Estate And Accumulated Depreciation Accumulated Depreciation	684
Real Estate And Accumulated Depreciation Year Of Construction	1972
Real Estate And Accumulated Depreciation Year Of Acquisition	1972
Retail NJ Total New Jersey [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	840,225
Real Estate And Accumulated Depreciation Initial Cost Of Land	118,869
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	432,312
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	529,529
Real Estate And Accumulated Depreciation Carrying Amount Of Land	143,239
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	937,471
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,080,710
Real Estate And Accumulated Depreciation Accumulated Depreciation	251,477
Retail NY Bronx (Bruckner Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	66,100
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	259,503
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(18,471)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	62,243
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	244,889
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	307,132
Real Estate And Accumulated Depreciation Accumulated Depreciation	45,494
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NY Hicksville (Broadway Mall) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	126,324
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	48,904
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(79,777)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,513
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	30,938
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	95,451
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,748
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail NY Poughkeepsie [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,733
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	12,026
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	16,556
Real Estate And Accumulated Depreciation Carrying Amount Of Land	8,469
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	32,846
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	41,315
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,348
Real Estate And Accumulated Depreciation Year Of Construction	2009
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail NY Huntington [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	16,619
Real Estate And Accumulated Depreciation Initial Cost Of Land	21,200
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	33,667
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,377
Real Estate And Accumulated Depreciation Carrying Amount Of Land	21,200
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	35,044
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	56,244
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,292
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NY Mount Kisco [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	28,206
Real Estate And Accumulated Depreciation Initial Cost Of Land	22,700
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,700
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	442
Real Estate And Accumulated Depreciation Carrying Amount Of Land	23,297
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	26,545
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	49,842
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,002
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NY Bronx (1750 - 1780 Gun Hill Road) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,427
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	11,885
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	19,156
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,428
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	31,040
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	37,468
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,109
Real Estate And Accumulated Depreciation Year Of Construction	2009
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail NY Staten Island [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	17,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	11,446
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	21,262
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	959
Real Estate And Accumulated Depreciation Carrying Amount Of Land	11,446
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	22,221
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	33,667
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,454
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Retail NY Inwood [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	12,419
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	19,097
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	588
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,419
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	19,685
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	32,104
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,413
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Retail NY Queens (99-01 Queens Blvd) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	7,839
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	20,392
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,123
Real Estate And Accumulated Depreciation Carrying Amount Of Land	7,839
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	22,515
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	30,354
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,567
Real Estate And Accumulated Depreciation Year Of Acquisition	2004
Retail NY West Babylon [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,720
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	13,786
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	27
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,720
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	13,813
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	20,533
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,347
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NY Freeport (437 E. Sunrise Highway) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	21,321
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,231
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,747
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,453
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,231
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,200
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,431
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,178
Real Estate And Accumulated Depreciation Year Of Construction	1981
Real Estate And Accumulated Depreciation Year Of Acquisition	1981
Retail NY Dewitt [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,116
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	7,116
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	7,116
Real Estate And Accumulated Depreciation Accumulated Depreciation	1,277
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail NY Buffalo (Amherst) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,743
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4,056
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,966
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,107
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	14,658
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	19,765
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,409
Real Estate And Accumulated Depreciation Year Of Construction	1968
Real Estate And Accumulated Depreciation Year Of Acquisition	1968
Retail NY Oceanside [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,710
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,306
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,710
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,306
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,016
Real Estate And Accumulated Depreciation Accumulated Depreciation	379
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail NY Albany (Menands) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	460
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,091
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,389
Real Estate And Accumulated Depreciation Carrying Amount Of Land	460
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,480
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,940
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,620
Real Estate And Accumulated Depreciation Year Of Construction	1965
Real Estate And Accumulated Depreciation Year Of Acquisition	1965
Retail NY Rochester (Henrietta) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,647
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	892
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,539
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,539
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,229
Real Estate And Accumulated Depreciation Year Of Construction	1971
Real Estate And Accumulated Depreciation Year Of Acquisition	1971
Retail NY Rochester [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	4,374
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,172
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,172
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,172
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Construction	1966
Real Estate And Accumulated Depreciation Year Of Acquisition	1966
Retail NY Freeport (240 Sunrise Highway) [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	260
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	260
Real Estate And Accumulated Depreciation Accumulated Depreciation	128
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail NY Commack [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	43
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	184
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	227
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	227
Real Estate And Accumulated Depreciation Accumulated Depreciation	88
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail NY New Hyde Park [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	4
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4
Real Estate And Accumulated Depreciation Accumulated Depreciation	126
Real Estate And Accumulated Depreciation Year Of Construction	1970
Real Estate And Accumulated Depreciation Year Of Acquisition	1976
Retail NY Total New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	87,520
Real Estate And Accumulated Depreciation Initial Cost Of Land	306,224
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	490,232
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(41,876)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	236,254
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	518,326
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	754,580
Real Estate And Accumulated Depreciation Accumulated Depreciation	104,208
Retail PA Wilkes Barre [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	19,898
Real Estate And Accumulated Depreciation Initial Cost Of Land	6,053
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	26,646
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	424
Real Estate And Accumulated Depreciation Carrying Amount Of Land	6,053
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	27,070
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	33,123
Real Estate And Accumulated Depreciation Accumulated Depreciation	4,129
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
Retail PA Allentown [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	29,904
Real Estate And Accumulated Depreciation Initial Cost Of Land	187
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	15,580
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,584
Real Estate And Accumulated Depreciation Carrying Amount Of Land	187
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	17,164
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	17,351
Real Estate And Accumulated Depreciation Accumulated Depreciation	13,169
Real Estate And Accumulated Depreciation Year Of Construction	1957
Real Estate And Accumulated Depreciation Year Of Acquisition	1957
Retail PA Bensalem [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	14,843
Real Estate And Accumulated Depreciation Initial Cost Of Land	2,727
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	6,698
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,895
Real Estate And Accumulated Depreciation Carrying Amount Of Land	2,727
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	8,593
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,320
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,443
Real Estate And Accumulated Depreciation Year Of Construction	1972/1999
Real Estate And Accumulated Depreciation Year Of Acquisition	1972
Retail PA Bethlehem [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,576
Real Estate And Accumulated Depreciation Initial Cost Of Land	827
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	5,200
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	960
Real Estate And Accumulated Depreciation Carrying Amount Of Land	839
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	6,148
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	6,987
Real Estate And Accumulated Depreciation Accumulated Depreciation	5,530
Real Estate And Accumulated Depreciation Year Of Construction	1966
Real Estate And Accumulated Depreciation Year Of Acquisition	1966
Retail PA Wyomissing [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,646
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	2,381
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	5,027
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,027
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,139
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail PA York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,194
Real Estate And Accumulated Depreciation Initial Cost Of Land	409
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,568
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,566
Real Estate And Accumulated Depreciation Carrying Amount Of Land	409
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	4,134
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,543
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,609
Real Estate And Accumulated Depreciation Year Of Construction	1970
Real Estate And Accumulated Depreciation Year Of Acquisition	1970
Retail PA Broomall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	10,660
Real Estate And Accumulated Depreciation Initial Cost Of Land	850
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,171
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	1,224
Real Estate And Accumulated Depreciation Carrying Amount Of Land	850
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,395
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	4,245
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,696
Real Estate And Accumulated Depreciation Year Of Construction	1966
Real Estate And Accumulated Depreciation Year Of Acquisition	1966
Retail PA Lancaster [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	5,385
Real Estate And Accumulated Depreciation Initial Cost Of Land	3,140
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	63
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	711
Real Estate And Accumulated Depreciation Carrying Amount Of Land	3,140
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	774
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,914
Real Estate And Accumulated Depreciation Accumulated Depreciation	491
Real Estate And Accumulated Depreciation Year Of Construction	1966
Real Estate And Accumulated Depreciation Year Of Acquisition	1966
Retail PA Glenolden [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	6,834
Real Estate And Accumulated Depreciation Initial Cost Of Land	850
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,820
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	568
Real Estate And Accumulated Depreciation Carrying Amount Of Land	850
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,388
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,238
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,022
Real Estate And Accumulated Depreciation Year Of Construction	1975
Real Estate And Accumulated Depreciation Year Of Acquisition	1975
Retail PA Springfield [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	80
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	80
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	80
Real Estate And Accumulated Depreciation Accumulated Depreciation	44
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail PA Total Pennsylvania [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	98,294
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,043
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	63,392
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	11,393
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,055
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	74,773
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	89,828
Real Estate And Accumulated Depreciation Accumulated Depreciation	38,272
Retail SC Charleston [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,634
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,634
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,634
Real Estate And Accumulated Depreciation Accumulated Depreciation	659
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail TN Antioch [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,521
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	2,386
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,521
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,386
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,907
Real Estate And Accumulated Depreciation Accumulated Depreciation	432
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail Springfield Mall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	49,516
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	265,964
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	17,936
Real Estate And Accumulated Depreciation Carrying Amount Of Land	849
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	332,567
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	333,416
Real Estate And Accumulated Depreciation Accumulated Depreciation	830
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail VA Norfolk [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	3,927
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	15
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,942
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,942
Real Estate And Accumulated Depreciation Accumulated Depreciation	2,684
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Retail VA Total Virginia [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	49,516
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	269,891
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	17,951
Real Estate And Accumulated Depreciation Carrying Amount Of Land	849
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	336,509
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	337,358
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,514
Retail WI Fond Du Lac [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	174
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	102
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	276
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	276
Real Estate And Accumulated Depreciation Accumulated Depreciation	93
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Retail Las Catalinas Mall [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	15,280
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	64,370
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,015
Real Estate And Accumulated Depreciation Carrying Amount Of Land	15,280
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	73,385
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	88,665
Real Estate And Accumulated Depreciation Accumulated Depreciation	28,700
Real Estate And Accumulated Depreciation Year Of Construction	1996
Real Estate And Accumulated Depreciation Year Of Acquisition	2002
Retail Montehiedra Town Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	120,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	9,182
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	66,751
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	7,874
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,267
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	74,540
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	83,807
Real Estate And Accumulated Depreciation Accumulated Depreciation	29,843
Real Estate And Accumulated Depreciation Year Of Construction	1996
Real Estate And Accumulated Depreciation Year Of Acquisition	1997
Retail PR Total Puerto Rico [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	120,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	24,462
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	131,121
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	16,889
Real Estate And Accumulated Depreciation Carrying Amount Of Land	24,547
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	147,925
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	172,472
Real Estate And Accumulated Depreciation Accumulated Depreciation	58,543
Retail Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,861
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	3,861
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	3,861
Real Estate And Accumulated Depreciation Accumulated Depreciation	487
Retail Total Retail Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	1,200,762
Real Estate And Accumulated Depreciation Initial Cost Of Land	629,144
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,612,664
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	581,001
Real Estate And Accumulated Depreciation Carrying Amount Of Land	533,972
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,288,837
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,822,809
Real Estate And Accumulated Depreciation Accumulated Depreciation	516,965
Merchandise Mart IL Chicago [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	64,528
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	319,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	247,014
Real Estate And Accumulated Depreciation Carrying Amount Of Land	64,535
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	566,153
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	630,688
Real Estate And Accumulated Depreciation Accumulated Depreciation	186,040
Real Estate And Accumulated Depreciation Year Of Construction	1930
Real Estate And Accumulated Depreciation Year Of Acquisition	1998
Merchandise Mart IL 527 W. Kinzie, Chicago [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	5,166
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land	5,166
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	5,166
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Merchandise Mart IL Total [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	69,694
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	319,146
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	247,014
Real Estate And Accumulated Depreciation Carrying Amount Of Land	69,701
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	566,153
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	635,854
Real Estate And Accumulated Depreciation Accumulated Depreciation	186,040
Merchandise Mart NY 7 West 34th Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	34,614
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	94,167
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	35,522
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,614
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	129,689
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	164,303
Real Estate And Accumulated Depreciation Accumulated Depreciation	38,836
Real Estate And Accumulated Depreciation Year Of Construction	1901
Real Estate And Accumulated Depreciation Year Of Acquisition	2000
Merchandise Mart NY MMPI Piers [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	11,702
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	11,702
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,702
Real Estate And Accumulated Depreciation Accumulated Depreciation	749
Real Estate And Accumulated Depreciation Year Of Acquisition	2008
Merchandise Mart NY Total New York [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	34,614
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	94,167
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	47,224
Real Estate And Accumulated Depreciation Carrying Amount Of Land	34,614
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	141,391
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	176,005
Real Estate And Accumulated Depreciation Accumulated Depreciation	39,585
Merchandise Mart Total Merchandise Mart [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	550,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	104,308
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	413,313
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	294,238
Real Estate And Accumulated Depreciation Carrying Amount Of Land	104,315
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	707,544
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	811,859
Real Estate And Accumulated Depreciation Accumulated Depreciation	225,625
Warehouse/Industrial NJ East Hanover [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	576
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,752
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,039
Real Estate And Accumulated Depreciation Carrying Amount Of Land	691
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	16,676
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	17,367
Real Estate And Accumulated Depreciation Accumulated Depreciation	13,996
Real Estate And Accumulated Depreciation Year Of Construction	1972
Real Estate And Accumulated Depreciation Year Of Acquisition	1972
Warehouse/Industrial Total Warehouse/Industrial [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	576
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7,752
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	9,039
Real Estate And Accumulated Depreciation Carrying Amount Of Land	691
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	16,676
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	17,367
Real Estate And Accumulated Depreciation Accumulated Depreciation	13,996
Other Properties 555 California Street [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	600,000
Real Estate And Accumulated Depreciation Initial Cost Of Land	221,903
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	893,324
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	49,758
Real Estate And Accumulated Depreciation Carrying Amount Of Land	221,903
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	943,082
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,164,985
Real Estate And Accumulated Depreciation Accumulated Depreciation	169,495
Real Estate And Accumulated Depreciation Year Of Construction	1922/1969/1970
Real Estate And Accumulated Depreciation Year Of Acquisition	2007
New York Manhattan 220 Central Park South Site [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	115,720
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	16,420
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	367,471
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	499,611
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	499,611
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Other Properties Wasserman [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	28,052
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(16,349)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	9,364
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	2,339
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	11,703
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Other Properties 40 East 66th Residential [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	29,199
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	85,798
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(82,151)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	12,765
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	20,081
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	32,846
Real Estate And Accumulated Depreciation Accumulated Depreciation	3,777
Real Estate And Accumulated Depreciation Year Of Acquisition	2005
Other Properties 677-679 Madison [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	1,462
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	1,058
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	285
Real Estate And Accumulated Depreciation Carrying Amount Of Land	1,627
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,178
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	2,805
Real Estate And Accumulated Depreciation Accumulated Depreciation	283
Real Estate And Accumulated Depreciation Year Of Acquisition	2006
Other Properties Atlantic City NJ [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	59,309
Real Estate And Accumulated Depreciation Initial Cost Of Land	83,089
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	7
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	(7)
Real Estate And Accumulated Depreciation Carrying Amount Of Land	83,089
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	83,089
Real Estate And Accumulated Depreciation Accumulated Depreciation	0
Real Estate And Accumulated Depreciation Year Of Acquisition	2010
Other Properties Total Other Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	659,309
Real Estate And Accumulated Depreciation Initial Cost Of Land	479,425
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	996,607
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	319,007
Real Estate And Accumulated Depreciation Carrying Amount Of Land	328,748
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	1,466,291
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	1,795,039
Real Estate And Accumulated Depreciation Accumulated Depreciation	173,555
Leasehold Improvements Equipment and Other [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	0
Real Estate And Accumulated Depreciation Initial Cost Of Land	0
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	0
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	132,523
Real Estate And Accumulated Depreciation Carrying Amount Of Land	0
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	132,523
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	132,523
Real Estate And Accumulated Depreciation Accumulated Depreciation	102,538
Total December 31, 2010 [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate And Accumulated Depreciation Amount Of Encumbrances	8,331,993
Real Estate And Accumulated Depreciation Initial Cost Of Land	4,512,616
Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements	10,261,843
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Improvements	3,580,167
Real Estate And Accumulated Depreciation Carrying Amount Of Land	4,205,815
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements	14,148,811
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements	18,354,626
Real Estate And Accumulated Depreciation Accumulated Depreciation	$ 3,410,933