SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - Schedule of Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 909,174
Initial Cost to Company of Land	743,847
Initial Cost to Company of Buildings and Improvements	1,960,389
Increase (Decrease) in Net Investments	762,245
Carrying Amount of Land	746,943
Carrying Amount of Buildings and Improvements	2,719,539
Total Carrying Amount	3,466,482	$ 3,382,000	$ 2,736,283	$ 2,208,595
Accumulated Depreciation	339,862	287,066	$ 298,703	$ 256,015
Unamortized Loan Costs	(12,943)
Unamortized Premium	856	$ 1,336
Real estate, federal income tax basis	3,400,000
Real Estate Under Development
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	47,061
Initial Cost to Company of Land	88,108
Initial Cost to Company of Buildings and Improvements	31,473
Increase (Decrease) in Net Investments	54,122
Carrying Amount of Land	88,108
Carrying Amount of Buildings and Improvements	85,594
Total Carrying Amount	173,702
Accumulated Depreciation	0
Core Portfolio | Crescent Plaza Brockton, MA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Initial Cost to Company of Land	1,147
Initial Cost to Company of Buildings and Improvements	7,425
Increase (Decrease) in Net Investments	3,194
Carrying Amount of Land	1,147
Carrying Amount of Buildings and Improvements	10,619
Total Carrying Amount	11,766
Accumulated Depreciation	$ 7,749
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | New Loudon Center Latham, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	505
Initial Cost to Company of Buildings and Improvements	4,161
Increase (Decrease) in Net Investments	14,118
Carrying Amount of Land	505
Carrying Amount of Buildings and Improvements	18,279
Total Carrying Amount	18,784
Accumulated Depreciation	$ 14,486
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Mark Plaza Edwardsville, PA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	3,396
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	3,396
Total Carrying Amount	3,396
Accumulated Depreciation	$ 2,934
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Plaza 422 Lebanon, PA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	190
Initial Cost to Company of Buildings and Improvements	3,004
Increase (Decrease) in Net Investments	2,765
Carrying Amount of Land	190
Carrying Amount of Buildings and Improvements	5,769
Total Carrying Amount	5,959
Accumulated Depreciation	$ 5,192
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Route 6 Mall Honesdale, PA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,664
Initial Cost to Company of Buildings and Improvements	0
Increase (Decrease) in Net Investments	12,446
Carrying Amount of Land	1,664
Carrying Amount of Buildings and Improvements	12,446
Total Carrying Amount	14,110
Accumulated Depreciation	$ 9,234
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Abington Towne Center Abington, PA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	799
Initial Cost to Company of Buildings and Improvements	3,197
Increase (Decrease) in Net Investments	2,870
Carrying Amount of Land	799
Carrying Amount of Buildings and Improvements	6,067
Total Carrying Amount	6,866
Accumulated Depreciation	$ 3,890
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Bloomfield Town Square Bloomfield Hills, MI
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	3,207
Initial Cost to Company of Buildings and Improvements	13,774
Increase (Decrease) in Net Investments	23,557
Carrying Amount of Land	3,207
Carrying Amount of Buildings and Improvements	37,331
Total Carrying Amount	40,538
Accumulated Depreciation	$ 21,396
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Elmwood Park Shopping Center Elmwood Park, NJ
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	3,248
Initial Cost to Company of Buildings and Improvements	12,992
Increase (Decrease) in Net Investments	15,857
Carrying Amount of Land	3,798
Carrying Amount of Buildings and Improvements	28,299
Total Carrying Amount	32,097
Accumulated Depreciation	$ 19,237
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Merrillville Plaza Hobart, IN
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,288
Initial Cost to Company of Buildings and Improvements	17,152
Increase (Decrease) in Net Investments	5,661
Carrying Amount of Land	4,288
Carrying Amount of Buildings and Improvements	22,813
Total Carrying Amount	27,101
Accumulated Depreciation	$ 12,260
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Marketplace of Absecon Absecon, NJ
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	2,573
Initial Cost to Company of Buildings and Improvements	10,294
Increase (Decrease) in Net Investments	4,900
Carrying Amount of Land	2,577
Carrying Amount of Buildings and Improvements	15,190
Total Carrying Amount	17,767
Accumulated Depreciation	$ 8,107
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 239 Greenwich Avenue Greenwich, CT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 27,000
Initial Cost to Company of Land	1,817
Initial Cost to Company of Buildings and Improvements	15,846
Increase (Decrease) in Net Investments	1,032
Carrying Amount of Land	1,817
Carrying Amount of Buildings and Improvements	16,878
Total Carrying Amount	18,695
Accumulated Depreciation	$ 7,830
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Hobson West Plaza Naperville, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,793
Initial Cost to Company of Buildings and Improvements	7,172
Increase (Decrease) in Net Investments	1,983
Carrying Amount of Land	1,793
Carrying Amount of Buildings and Improvements	9,155
Total Carrying Amount	10,948
Accumulated Depreciation	$ 5,095
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Village Commons Shopping Center Smithtown, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	3,229
Initial Cost to Company of Buildings and Improvements	12,917
Increase (Decrease) in Net Investments	4,265
Carrying Amount of Land	3,229
Carrying Amount of Buildings and Improvements	17,182
Total Carrying Amount	20,411
Accumulated Depreciation	$ 9,389
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Town Line Plaza Rocky Hill, CT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	878
Initial Cost to Company of Buildings and Improvements	3,510
Increase (Decrease) in Net Investments	7,736
Carrying Amount of Land	907
Carrying Amount of Buildings and Improvements	11,217
Total Carrying Amount	12,124
Accumulated Depreciation	$ 9,062
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Branch Shopping Center Smithtown, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	3,156
Initial Cost to Company of Buildings and Improvements	12,545
Increase (Decrease) in Net Investments	15,935
Carrying Amount of Land	3,401
Carrying Amount of Buildings and Improvements	28,235
Total Carrying Amount	31,636
Accumulated Depreciation	$ 11,247
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Methuen Shopping Center Methuen, MA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	956
Initial Cost to Company of Buildings and Improvements	3,826
Increase (Decrease) in Net Investments	1,260
Carrying Amount of Land	961
Carrying Amount of Buildings and Improvements	5,081
Total Carrying Amount	6,042
Accumulated Depreciation	$ 2,518
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | The Gateway Shopping Center South Burlington, VT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,273
Initial Cost to Company of Buildings and Improvements	5,091
Increase (Decrease) in Net Investments	12,262
Carrying Amount of Land	1,273
Carrying Amount of Buildings and Improvements	17,353
Total Carrying Amount	18,626
Accumulated Depreciation	$ 9,521
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Mad River Station Dayton, OH
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	2,350
Initial Cost to Company of Buildings and Improvements	9,404
Increase (Decrease) in Net Investments	2,102
Carrying Amount of Land	2,350
Carrying Amount of Buildings and Improvements	11,506
Total Carrying Amount	13,856
Accumulated Depreciation	$ 5,597
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Pacesetter Park Shopping Center Ramapo, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,475
Initial Cost to Company of Buildings and Improvements	5,899
Increase (Decrease) in Net Investments	3,602
Carrying Amount of Land	1,475
Carrying Amount of Buildings and Improvements	9,501
Total Carrying Amount	10,976
Accumulated Depreciation	$ 4,976
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Town Center
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 26,250
Initial Cost to Company of Land	5,063
Initial Cost to Company of Buildings and Improvements	15,252
Increase (Decrease) in Net Investments	2,495
Carrying Amount of Land	5,201
Carrying Amount of Buildings and Improvements	17,609
Total Carrying Amount	22,810
Accumulated Depreciation	$ 6,796
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Bartow Avenue Bronx, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,691
Initial Cost to Company of Buildings and Improvements	5,803
Increase (Decrease) in Net Investments	1,184
Carrying Amount of Land	1,691
Carrying Amount of Buildings and Improvements	6,987
Total Carrying Amount	8,678
Accumulated Depreciation	$ 2,958
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Amboy Road Staten Island, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	11,909
Increase (Decrease) in Net Investments	2,483
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	14,392
Total Carrying Amount	14,392
Accumulated Depreciation	$ 6,564
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Chestnut Hill Philadelphia, PA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	8,289
Initial Cost to Company of Buildings and Improvements	5,691
Increase (Decrease) in Net Investments	4,509
Carrying Amount of Land	8,289
Carrying Amount of Buildings and Improvements	10,200
Total Carrying Amount	18,489
Accumulated Depreciation	$ 3,877
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 2914 Third Avenue Bronx, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	11,108
Initial Cost to Company of Buildings and Improvements	8,038
Increase (Decrease) in Net Investments	4,768
Carrying Amount of Land	11,855
Carrying Amount of Buildings and Improvements	12,059
Total Carrying Amount	23,914
Accumulated Depreciation	$ 2,757
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | West Shore Expressway Staten Island, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	3,380
Initial Cost to Company of Buildings and Improvements	13,499
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	3,380
Carrying Amount of Buildings and Improvements	13,499
Total Carrying Amount	16,879
Accumulated Depreciation	$ 4,114
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | West 54th Street Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	16,699
Initial Cost to Company of Buildings and Improvements	18,704
Increase (Decrease) in Net Investments	1,236
Carrying Amount of Land	16,699
Carrying Amount of Buildings and Improvements	19,940
Total Carrying Amount	36,639
Accumulated Depreciation	$ 5,480
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 5-7 East 17th Street Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	3,048
Initial Cost to Company of Buildings and Improvements	7,281
Increase (Decrease) in Net Investments	5,183
Carrying Amount of Land	3,048
Carrying Amount of Buildings and Improvements	12,464
Total Carrying Amount	15,512
Accumulated Depreciation	$ 2,426
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 651-671 W Diversey Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	8,576
Initial Cost to Company of Buildings and Improvements	17,256
Increase (Decrease) in Net Investments	8
Carrying Amount of Land	8,576
Carrying Amount of Buildings and Improvements	17,264
Total Carrying Amount	25,840
Accumulated Depreciation	$ 2,841
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 15 Mercer Street New York, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,887
Initial Cost to Company of Buildings and Improvements	2,483
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,887
Carrying Amount of Buildings and Improvements	2,483
Total Carrying Amount	4,370
Accumulated Depreciation	$ 404
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 4401 White Plains Bronx, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,581
Initial Cost to Company of Buildings and Improvements	5,054
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,581
Carrying Amount of Buildings and Improvements	5,054
Total Carrying Amount	6,635
Accumulated Depreciation	$ 800
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Chicago Street Retail Portfolio
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	17,527
Initial Cost to Company of Buildings and Improvements	49,501
Increase (Decrease) in Net Investments	5,544
Carrying Amount of Land	17,565
Carrying Amount of Buildings and Improvements	55,007
Total Carrying Amount	72,572
Accumulated Depreciation	$ 11,383
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 1520 Milwaukee Avenue Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	2,110
Initial Cost to Company of Buildings and Improvements	1,306
Increase (Decrease) in Net Investments	2
Carrying Amount of Land	2,110
Carrying Amount of Buildings and Improvements	1,308
Total Carrying Amount	3,418
Accumulated Depreciation	$ 193
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 330-340 River St Cambridge, MA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 11,644
Initial Cost to Company of Land	8,404
Initial Cost to Company of Buildings and Improvements	14,235
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	8,404
Carrying Amount of Buildings and Improvements	14,235
Total Carrying Amount	22,639
Accumulated Depreciation	$ 2,179
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Rhode Island Place Shopping Center Washington, D.C.
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	7,458
Initial Cost to Company of Buildings and Improvements	15,968
Increase (Decrease) in Net Investments	1,708
Carrying Amount of Land	7,458
Carrying Amount of Buildings and Improvements	17,676
Total Carrying Amount	25,134
Accumulated Depreciation	$ 2,709
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 930 Rush Street Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,933
Initial Cost to Company of Buildings and Improvements	14,587
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	4,933
Carrying Amount of Buildings and Improvements	14,587
Total Carrying Amount	19,520
Accumulated Depreciation	$ 2,097
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 28 Jericho Turnpike Westbury, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 14,402
Initial Cost to Company of Land	6,220
Initial Cost to Company of Buildings and Improvements	24,416
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	6,220
Carrying Amount of Buildings and Improvements	24,416
Total Carrying Amount	30,636
Accumulated Depreciation	$ 3,575
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 181 Main Street Westport, CT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,908
Initial Cost to Company of Buildings and Improvements	12,158
Increase (Decrease) in Net Investments	333
Carrying Amount of Land	1,908
Carrying Amount of Buildings and Improvements	12,491
Total Carrying Amount	14,399
Accumulated Depreciation	$ 1,612
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 83 Spring Street Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,754
Initial Cost to Company of Buildings and Improvements	9,200
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,754
Carrying Amount of Buildings and Improvements	9,200
Total Carrying Amount	10,954
Accumulated Depreciation	$ 1,265
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 60 Orange Street Bloomfield, NJ
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7,522
Initial Cost to Company of Land	3,609
Initial Cost to Company of Buildings and Improvements	10,790
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	3,609
Carrying Amount of Buildings and Improvements	10,790
Total Carrying Amount	14,399
Accumulated Depreciation	$ 1,562
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 179-53 & 1801-03 Connecticut Avenue Washington, D.C.
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	11,690
Initial Cost to Company of Buildings and Improvements	10,135
Increase (Decrease) in Net Investments	802
Carrying Amount of Land	11,690
Carrying Amount of Buildings and Improvements	10,937
Total Carrying Amount	22,627
Accumulated Depreciation	$ 1,522
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 639 West Diversey Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,429
Initial Cost to Company of Buildings and Improvements	6,102
Increase (Decrease) in Net Investments	779
Carrying Amount of Land	4,429
Carrying Amount of Buildings and Improvements	6,881
Total Carrying Amount	11,310
Accumulated Depreciation	$ 1,069
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 664 North Michigan Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 40,584
Initial Cost to Company of Land	15,240
Initial Cost to Company of Buildings and Improvements	65,331
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	15,240
Carrying Amount of Buildings and Improvements	65,331
Total Carrying Amount	80,571
Accumulated Depreciation	$ 7,973
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 8-12 E. Walton Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	5,398
Initial Cost to Company of Buildings and Improvements	15,601
Increase (Decrease) in Net Investments	939
Carrying Amount of Land	5,398
Carrying Amount of Buildings and Improvements	16,540
Total Carrying Amount	21,938
Accumulated Depreciation	$ 1,879
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 3200-3204 M Street Washington, DC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	6,899
Initial Cost to Company of Buildings and Improvements	4,249
Increase (Decrease) in Net Investments	168
Carrying Amount of Land	6,899
Carrying Amount of Buildings and Improvements	4,417
Total Carrying Amount	11,316
Accumulated Depreciation	$ 547
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 868 Broadway Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	3,519
Initial Cost to Company of Buildings and Improvements	9,247
Increase (Decrease) in Net Investments	5
Carrying Amount of Land	3,519
Carrying Amount of Buildings and Improvements	9,252
Total Carrying Amount	12,771
Accumulated Depreciation	$ 942
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 313-315 Bowery Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	5,516
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	5,516
Total Carrying Amount	5,516
Accumulated Depreciation	$ 893
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 120 West Broadway Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	32,819
Increase (Decrease) in Net Investments	1,116
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	33,935
Total Carrying Amount	33,935
Accumulated Depreciation	$ 2,192
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 11 E. Walton Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	16,744
Initial Cost to Company of Buildings and Improvements	28,346
Increase (Decrease) in Net Investments	192
Carrying Amount of Land	16,744
Carrying Amount of Buildings and Improvements	28,538
Total Carrying Amount	45,282
Accumulated Depreciation	$ 2,923
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 61 Main St. Westport, CT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,578
Initial Cost to Company of Buildings and Improvements	2,645
Increase (Decrease) in Net Investments	182
Carrying Amount of Land	4,578
Carrying Amount of Buildings and Improvements	2,827
Total Carrying Amount	7,405
Accumulated Depreciation	$ 307
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 865 W. North Avenue Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,893
Initial Cost to Company of Buildings and Improvements	11,594
Increase (Decrease) in Net Investments	23
Carrying Amount of Land	1,893
Carrying Amount of Buildings and Improvements	11,617
Total Carrying Amount	13,510
Accumulated Depreciation	$ 1,105
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 152-154 Spring St. Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	8,544
Initial Cost to Company of Buildings and Improvements	27,001
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	8,544
Carrying Amount of Buildings and Improvements	27,001
Total Carrying Amount	35,545
Accumulated Depreciation	$ 2,509
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 2520 Flatbush Ave Brooklyn, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	6,613
Initial Cost to Company of Buildings and Improvements	10,419
Increase (Decrease) in Net Investments	193
Carrying Amount of Land	6,613
Carrying Amount of Buildings and Improvements	10,612
Total Carrying Amount	17,225
Accumulated Depreciation	$ 1,026
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 252-256 Greenwich Avenue Greenwich, CT
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	10,175
Initial Cost to Company of Buildings and Improvements	12,641
Increase (Decrease) in Net Investments	119
Carrying Amount of Land	10,175
Carrying Amount of Buildings and Improvements	12,760
Total Carrying Amount	22,935
Accumulated Depreciation	$ 1,300
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Bedford Green Bedford Hills, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	12,425
Initial Cost to Company of Buildings and Improvements	32,730
Increase (Decrease) in Net Investments	1,929
Carrying Amount of Land	12,425
Carrying Amount of Buildings and Improvements	34,659
Total Carrying Amount	47,084
Accumulated Depreciation	$ 3,228
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 131-135 Prince Street Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	57,536
Increase (Decrease) in Net Investments	135
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	57,671
Total Carrying Amount	57,671
Accumulated Depreciation	$ 8,969
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Shops at Grand Ave Queens, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	20,264
Initial Cost to Company of Buildings and Improvements	33,131
Increase (Decrease) in Net Investments	312
Carrying Amount of Land	20,264
Carrying Amount of Buildings and Improvements	33,443
Total Carrying Amount	53,707
Accumulated Depreciation	$ 2,746
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 201 Needham St. Newton, MA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,550
Initial Cost to Company of Buildings and Improvements	4,459
Increase (Decrease) in Net Investments	105
Carrying Amount of Land	4,550
Carrying Amount of Buildings and Improvements	4,564
Total Carrying Amount	9,114
Accumulated Depreciation	$ 419
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | City Center San Francisco, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	36,063
Initial Cost to Company of Buildings and Improvements	109,098
Increase (Decrease) in Net Investments	2,604
Carrying Amount of Land	36,063
Carrying Amount of Buildings and Improvements	111,702
Total Carrying Amount	147,765
Accumulated Depreciation	$ 7,731
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 163 Highland Avenue Needham, MA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 9,112
Initial Cost to Company of Land	12,679
Initial Cost to Company of Buildings and Improvements	11,213
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	12,679
Carrying Amount of Buildings and Improvements	11,213
Total Carrying Amount	23,892
Accumulated Depreciation	$ 911
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Roosevelt Galleria Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,838
Initial Cost to Company of Buildings and Improvements	14,574
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	4,838
Carrying Amount of Buildings and Improvements	14,574
Total Carrying Amount	19,412
Accumulated Depreciation	$ 856
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Route 202 Shopping Center Wilmington, DE
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	6,346
Increase (Decrease) in Net Investments	13
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	6,359
Total Carrying Amount	6,359
Accumulated Depreciation	$ 467
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 991 Madison Avenue New York, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	76,965
Increase (Decrease) in Net Investments	175
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	77,140
Total Carrying Amount	77,140
Accumulated Depreciation	$ 2,749
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 165 Newbury Street - Boston, MA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	1,918
Initial Cost to Company of Buildings and Improvements	3,980
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,918
Carrying Amount of Buildings and Improvements	3,980
Total Carrying Amount	5,898
Accumulated Depreciation	$ 166
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Concord & Milwaukee - Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 2,802
Initial Cost to Company of Land	2,739
Initial Cost to Company of Buildings and Improvements	2,746
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	2,739
Carrying Amount of Buildings and Improvements	2,746
Total Carrying Amount	5,485
Accumulated Depreciation	$ 103
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | State & Washington - Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 24,974
Initial Cost to Company of Land	3,907
Initial Cost to Company of Buildings and Improvements	70,943
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	3,907
Carrying Amount of Buildings and Improvements	70,943
Total Carrying Amount	74,850
Accumulated Depreciation	$ 2,365
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 151 North State Street - Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 14,179
Initial Cost to Company of Land	1,941
Initial Cost to Company of Buildings and Improvements	25,529
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,941
Carrying Amount of Buildings and Improvements	25,529
Total Carrying Amount	27,470
Accumulated Depreciation	$ 904
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | North & Kingsbury - Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 12,931
Initial Cost to Company of Land	18,731
Initial Cost to Company of Buildings and Improvements	16,292
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	18,731
Carrying Amount of Buildings and Improvements	16,292
Total Carrying Amount	35,023
Accumulated Depreciation	$ 564
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Sullivan Center - Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	13,443
Initial Cost to Company of Buildings and Improvements	137,327
Increase (Decrease) in Net Investments	54
Carrying Amount of Land	13,443
Carrying Amount of Buildings and Improvements	137,381
Total Carrying Amount	150,824
Accumulated Depreciation	$ 4,578
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | California & Armitage - Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 2,622
Initial Cost to Company of Land	6,770
Initial Cost to Company of Buildings and Improvements	2,292
Increase (Decrease) in Net Investments	2
Carrying Amount of Land	6,770
Carrying Amount of Buildings and Improvements	2,294
Total Carrying Amount	9,064
Accumulated Depreciation	$ 84
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | 555 9th Street - San Francisco, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 60,000
Initial Cost to Company of Land	75,591
Initial Cost to Company of Buildings and Improvements	73,268
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	75,591
Carrying Amount of Buildings and Improvements	73,268
Total Carrying Amount	148,859
Accumulated Depreciation	$ 2,154
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Market Square Wilmington, DE
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	8,100
Initial Cost to Company of Buildings and Improvements	31,221
Increase (Decrease) in Net Investments	157
Carrying Amount of Land	8,100
Carrying Amount of Buildings and Improvements	31,379
Total Carrying Amount	39,479
Accumulated Depreciation	$ 75
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Core Portfolio | Undeveloped Land
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	100
Initial Cost to Company of Buildings and Improvements	0
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	100
Carrying Amount of Buildings and Improvements	0
Total Carrying Amount	100
Accumulated Depreciation	0
Funds | Fund II | City Point Brooklyn, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	224,820
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	100,316
Increase (Decrease) in Net Investments	455,125
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	555,441
Total Carrying Amount	555,441
Accumulated Depreciation	$ 13,628
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund II | 654 Broadway Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	9,040
Initial Cost to Company of Buildings and Improvements	3,654
Increase (Decrease) in Net Investments	2,883
Carrying Amount of Land	9,040
Carrying Amount of Buildings and Improvements	6,537
Total Carrying Amount	15,577
Accumulated Depreciation	$ 921
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund II | 640 Broadway Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 49,470
Initial Cost to Company of Land	12,503
Initial Cost to Company of Buildings and Improvements	19,960
Increase (Decrease) in Net Investments	12,921
Carrying Amount of Land	12,503
Carrying Amount of Buildings and Improvements	32,881
Total Carrying Amount	45,384
Accumulated Depreciation	$ 4,694
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund II | 3104 M St. Washington, DC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 4,419
Initial Cost to Company of Land	750
Initial Cost to Company of Buildings and Improvements	2,115
Increase (Decrease) in Net Investments	5,139
Carrying Amount of Land	750
Carrying Amount of Buildings and Improvements	7,254
Total Carrying Amount	8,004
Accumulated Depreciation	$ 283
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund II | 3780-3858 Nostrand Avenue Brooklyn, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 10,617
Initial Cost to Company of Land	6,229
Initial Cost to Company of Buildings and Improvements	11,216
Increase (Decrease) in Net Investments	6,139
Carrying Amount of Land	6,229
Carrying Amount of Buildings and Improvements	17,355
Total Carrying Amount	23,584
Accumulated Depreciation	$ 2,157
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 210 Bowery Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 10,919
Initial Cost to Company of Land	1,875
Initial Cost to Company of Buildings and Improvements	5,625
Increase (Decrease) in Net Investments	17,104
Carrying Amount of Land	1,875
Carrying Amount of Buildings and Improvements	22,729
Total Carrying Amount	24,604
Accumulated Depreciation	$ 142
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Paramus Plaza Paramus, NJ
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 18,454
Initial Cost to Company of Land	11,052
Initial Cost to Company of Buildings and Improvements	7,037
Increase (Decrease) in Net Investments	11,560
Carrying Amount of Land	11,052
Carrying Amount of Buildings and Improvements	18,597
Total Carrying Amount	29,649
Accumulated Depreciation	$ 1,739
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Lake Montclair Center Dumfries, VA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 14,098
Initial Cost to Company of Land	7,077
Initial Cost to Company of Buildings and Improvements	12,028
Increase (Decrease) in Net Investments	702
Carrying Amount of Land	7,077
Carrying Amount of Buildings and Improvements	12,730
Total Carrying Amount	19,807
Accumulated Depreciation	$ 1,482
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 938 W. North Avenue Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 14,100
Initial Cost to Company of Land	2,314
Initial Cost to Company of Buildings and Improvements	17,067
Increase (Decrease) in Net Investments	2,044
Carrying Amount of Land	2,314
Carrying Amount of Buildings and Improvements	19,111
Total Carrying Amount	21,425
Accumulated Depreciation	$ 1,733
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 27 E. 61st Street Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,813
Initial Cost to Company of Buildings and Improvements	14,438
Increase (Decrease) in Net Investments	6,693
Carrying Amount of Land	4,813
Carrying Amount of Buildings and Improvements	21,131
Total Carrying Amount	25,944
Accumulated Depreciation	$ 131
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 17 E. 71st Street Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 19,000
Initial Cost to Company of Land	7,391
Initial Cost to Company of Buildings and Improvements	20,176
Increase (Decrease) in Net Investments	266
Carrying Amount of Land	7,391
Carrying Amount of Buildings and Improvements	20,442
Total Carrying Amount	27,833
Accumulated Depreciation	$ 1,680
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Broughton St. Portfolio Savannah, GA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 24,699
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	0
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	0
Total Carrying Amount	0
Accumulated Depreciation	$ 0
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 1035 Third Ave Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 41,387
Initial Cost to Company of Land	12,759
Initial Cost to Company of Buildings and Improvements	37,431
Increase (Decrease) in Net Investments	4,648
Carrying Amount of Land	14,099
Carrying Amount of Buildings and Improvements	40,739
Total Carrying Amount	54,838
Accumulated Depreciation	$ 2,992
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 801 Madison Avenue Manhattan, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	4,178
Initial Cost to Company of Buildings and Improvements	28,470
Increase (Decrease) in Net Investments	4,474
Carrying Amount of Land	4,178
Carrying Amount of Buildings and Improvements	32,945
Total Carrying Amount	37,123
Accumulated Depreciation	$ 206
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 2208-2216 Fillmore Street San Francisco, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 5,606
Initial Cost to Company of Land	3,027
Initial Cost to Company of Buildings and Improvements	6,376
Increase (Decrease) in Net Investments	26
Carrying Amount of Land	3,027
Carrying Amount of Buildings and Improvements	6,402
Total Carrying Amount	9,429
Accumulated Depreciation	$ 348
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 146 Geary Street San Francisco, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 27,700
Initial Cost to Company of Land	9,500
Initial Cost to Company of Buildings and Improvements	28,500
Increase (Decrease) in Net Investments	7
Carrying Amount of Land	9,500
Carrying Amount of Buildings and Improvements	28,507
Total Carrying Amount	38,007
Accumulated Depreciation	$ 1,544
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 2207 Fillmore Street San Francisco, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 1,120
Initial Cost to Company of Land	1,498
Initial Cost to Company of Buildings and Improvements	1,735
Increase (Decrease) in Net Investments	119
Carrying Amount of Land	1,498
Carrying Amount of Buildings and Improvements	1,854
Total Carrying Amount	3,352
Accumulated Depreciation	$ 93
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 1861 Union St. San Francisco, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 2,315
Initial Cost to Company of Land	2,188
Initial Cost to Company of Buildings and Improvements	1,293
Increase (Decrease) in Net Investments	8
Carrying Amount of Land	2,188
Carrying Amount of Buildings and Improvements	1,301
Total Carrying Amount	3,489
Accumulated Depreciation	$ 67
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 1964 Union Street San Francisco, CA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 1,463
Initial Cost to Company of Land	563
Initial Cost to Company of Buildings and Improvements	1,688
Increase (Decrease) in Net Investments	2,577
Carrying Amount of Land	563
Carrying Amount of Buildings and Improvements	4,265
Total Carrying Amount	4,828
Accumulated Depreciation	$ 44
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Restaurants at Fort Point - Boston, MA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 6,425
Initial Cost to Company of Land	1,041
Initial Cost to Company of Buildings and Improvements	10,905
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,041
Carrying Amount of Buildings and Improvements	10,905
Total Carrying Amount	11,946
Accumulated Depreciation	$ 545
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Wake Forest Crossing - Wake Forest, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 24,000
Initial Cost to Company of Land	7,570
Initial Cost to Company of Buildings and Improvements	24,829
Increase (Decrease) in Net Investments	196
Carrying Amount of Land	7,570
Carrying Amount of Buildings and Improvements	25,025
Total Carrying Amount	32,595
Accumulated Depreciation	$ 989
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Airport Mall - Bangor, ME
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 5,613
Initial Cost to Company of Land	2,294
Initial Cost to Company of Buildings and Improvements	7,067
Increase (Decrease) in Net Investments	74
Carrying Amount of Land	2,294
Carrying Amount of Buildings and Improvements	7,141
Total Carrying Amount	9,435
Accumulated Depreciation	$ 278
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Colonie Plaza - Albany, NY
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 11,890
Initial Cost to Company of Land	2,852
Initial Cost to Company of Buildings and Improvements	9,619
Increase (Decrease) in Net Investments	4
Carrying Amount of Land	2,852
Carrying Amount of Buildings and Improvements	9,623
Total Carrying Amount	12,475
Accumulated Depreciation	$ 338
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Dauphin Plaza - Harrisburg, PA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 10,270
Initial Cost to Company of Land	5,290
Initial Cost to Company of Buildings and Improvements	9,464
Increase (Decrease) in Net Investments	317
Carrying Amount of Land	5,290
Carrying Amount of Buildings and Improvements	9,781
Total Carrying Amount	15,071
Accumulated Depreciation	$ 351
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | JFK Plaza - Waterville, ME
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 4,490
Initial Cost to Company of Land	751
Initial Cost to Company of Buildings and Improvements	5,991
Increase (Decrease) in Net Investments	7
Carrying Amount of Land	751
Carrying Amount of Buildings and Improvements	5,998
Total Carrying Amount	6,749
Accumulated Depreciation	$ 222
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Mayfair Shopping Center - Philadelphia, PA
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	6,178
Initial Cost to Company of Buildings and Improvements	9,266
Increase (Decrease) in Net Investments	32
Carrying Amount of Land	6,178
Carrying Amount of Buildings and Improvements	9,298
Total Carrying Amount	15,476
Accumulated Depreciation	$ 294
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Shaw's Plaza Waterville, ME
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 8,035
Initial Cost to Company of Land	828
Initial Cost to Company of Buildings and Improvements	11,814
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	828
Carrying Amount of Buildings and Improvements	11,814
Total Carrying Amount	12,642
Accumulated Depreciation	$ 388
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Wells Plaza - Wells, ME
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 3,368
Initial Cost to Company of Land	1,892
Initial Cost to Company of Buildings and Improvements	2,585
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,892
Carrying Amount of Buildings and Improvements	2,585
Total Carrying Amount	4,477
Accumulated Depreciation	$ 124
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | 717 N Michigan - Chicago, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 18,199
Initial Cost to Company of Land	20,674
Initial Cost to Company of Buildings and Improvements	10,093
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	20,674
Carrying Amount of Buildings and Improvements	10,093
Total Carrying Amount	30,767
Accumulated Depreciation	$ 270
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Shaw's Plaza North Windham, ME
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 5,988
Initial Cost to Company of Land	1,876
Initial Cost to Company of Buildings and Improvements	6,696
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	1,876
Carrying Amount of Buildings and Improvements	6,696
Total Carrying Amount	8,572
Accumulated Depreciation	$ 94
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund IV | Lincoln Place Fairview Heights, IL
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 23,100
Initial Cost to Company of Land	7,149
Initial Cost to Company of Buildings and Improvements	22,201
Increase (Decrease) in Net Investments	55
Carrying Amount of Land	7,149
Carrying Amount of Buildings and Improvements	22,256
Total Carrying Amount	29,405
Accumulated Depreciation	$ 545
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund V | Plaza Santa Fe Santa Fe, NM
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	0
Initial Cost to Company of Buildings and Improvements	28,214
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	0
Carrying Amount of Buildings and Improvements	28,214
Total Carrying Amount	28,214
Accumulated Depreciation	$ 452
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund V | Hickory Ridge - Hickory, NC
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 28,613
Initial Cost to Company of Land	7,852
Initial Cost to Company of Buildings and Improvements	29,998
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	7,852
Carrying Amount of Buildings and Improvements	29,998
Total Carrying Amount	37,850
Accumulated Depreciation	$ 312
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund V | New Towne Plaza - Canton, MI
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	5,040
Initial Cost to Company of Buildings and Improvements	17,391
Increase (Decrease) in Net Investments	1
Carrying Amount of Land	5,040
Carrying Amount of Buildings and Improvements	17,392
Total Carrying Amount	22,432
Accumulated Depreciation	$ 208
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Funds | Fund V | Fairlane Green Allen Park, MI
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Initial Cost to Company of Land	18,121
Initial Cost to Company of Buildings and Improvements	37,626
Increase (Decrease) in Net Investments	0
Carrying Amount of Land	18,121
Carrying Amount of Buildings and Improvements	37,626
Total Carrying Amount	55,747
Accumulated Depreciation	$ 0
Life on which Depreciation in Latest Statement of Income is Compared	40 years
Buildings
Real Estate and Accumulated Depreciation [Line Items]
Life on which Depreciation in Latest Statement of Income is Compared	40 years