Schedule III Real Estate Investments and Accumulated Depreciation - Property Holdings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	220
Encumbrances	$ 44,318
Initial Cost of Land	1,055,146
Initial Cost of Buildings & Improvements	717,086
Costs Capitalized Subsequent to Acquisition	192,127
Gross carrying amount, Land	1,055,146
Gross carrying amount, Building & Improvements	909,201
Total	2,052,941
Accumulated Depreciation	208,279	$ 169,772	$ 139,814
Unamortized net deferred financing costs	(30)
Real estate investment property, excluding unamortized net deferred financing costs [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	44,348
Real estate investment property, excluding intangible assets [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total	1,964,347
Accumulated Depreciation	144,922
Real estate investment property, intangible assets [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total	88,594
Accumulated Depreciation	$ 63,357
Los Angeles [Member] | 104th St [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,701
Initial Cost of Buildings & Improvements	976
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	3,701
Gross carrying amount, Building & Improvements	976
Total	4,677
Accumulated Depreciation	$ 58
Los Angeles [Member] | 139th Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	21,236
Initial Cost of Buildings & Improvements	15,783
Costs Capitalized Subsequent to Acquisition	2
Gross carrying amount, Land	21,236
Gross carrying amount, Building & Improvements	15,785
Total	37,021
Accumulated Depreciation	$ 847
Los Angeles [Member] | 630 Glasgow [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,245
Initial Cost of Buildings & Improvements	1,855
Costs Capitalized Subsequent to Acquisition	400
Gross carrying amount, Land	2,245
Gross carrying amount, Building & Improvements	2,255
Total	4,500
Accumulated Depreciation	$ 658
Los Angeles [Member] | 747 Glasgow [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,759
Initial Cost of Buildings & Improvements	1,555
Costs Capitalized Subsequent to Acquisition	297
Gross carrying amount, Land	1,759
Gross carrying amount, Building & Improvements	1,852
Total	3,611
Accumulated Depreciation	$ 366
Los Angeles [Member] | 14611 Broadway [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,757
Initial Cost of Buildings & Improvements	1,243
Costs Capitalized Subsequent to Acquisition	1,020
Gross carrying amount, Land	4,757
Gross carrying amount, Building & Improvements	2,263
Total	7,020
Accumulated Depreciation	$ 880
Los Angeles [Member] | 19601 Hamilton [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	7,409
Initial Cost of Buildings & Improvements	4,072
Costs Capitalized Subsequent to Acquisition	744
Gross carrying amount, Land	7,409
Gross carrying amount, Building & Improvements	4,816
Total	12,225
Accumulated Depreciation	$ 1,141
Los Angeles [Member] | 709 Hindry [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,105
Initial Cost of Buildings & Improvements	2,972
Costs Capitalized Subsequent to Acquisition	168
Gross carrying amount, Land	2,105
Gross carrying amount, Building & Improvements	3,140
Total	5,245
Accumulated Depreciation	$ 296
Los Angeles [Member] | Acacia [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	5,143
Initial Cost of Buildings & Improvements	1,985
Costs Capitalized Subsequent to Acquisition	625
Gross carrying amount, Land	5,143
Gross carrying amount, Building & Improvements	2,610
Total	7,753
Accumulated Depreciation	$ 470
Los Angeles [Member] | Anderson [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	5
Encumbrances	$ 0
Initial Cost of Land	17,095
Initial Cost of Buildings & Improvements	1,271
Costs Capitalized Subsequent to Acquisition	323
Gross carrying amount, Land	17,095
Gross carrying amount, Building & Improvements	1,594
Total	18,689
Accumulated Depreciation	$ 14
Los Angeles [Member] | Dominguez [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	11,370
Initial Cost of Buildings & Improvements	1,535
Costs Capitalized Subsequent to Acquisition	1,504
Gross carrying amount, Land	11,370
Gross carrying amount, Building & Improvements	3,039
Total	14,409
Accumulated Depreciation	$ 152
Los Angeles [Member] | Garfield [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	5
Encumbrances	$ 21,333
Initial Cost of Land	27,539
Initial Cost of Buildings & Improvements	22,694
Costs Capitalized Subsequent to Acquisition	3,738
Gross carrying amount, Land	27,539
Gross carrying amount, Building & Improvements	26,432
Total	53,971
Accumulated Depreciation	$ 7,343
Los Angeles [Member] | Hawthorne [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	8
Encumbrances	$ 0
Initial Cost of Land	17,226
Initial Cost of Buildings & Improvements	10,069
Costs Capitalized Subsequent to Acquisition	1,509
Gross carrying amount, Land	17,226
Gross carrying amount, Building & Improvements	11,578
Total	28,804
Accumulated Depreciation	$ 782
Los Angeles [Member] | Las Hermanas [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,330
Initial Cost of Buildings & Improvements	751
Costs Capitalized Subsequent to Acquisition	673
Gross carrying amount, Land	3,330
Gross carrying amount, Building & Improvements	1,424
Total	4,754
Accumulated Depreciation	$ 254
Los Angeles [Member] | Lynwood [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	3
Encumbrances	$ 0
Initial Cost of Land	43,885
Initial Cost of Buildings & Improvements	0
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	43,885
Gross carrying amount, Building & Improvements	0
Total	43,885
Accumulated Depreciation	$ 0
Los Angeles [Member] | Manhattan Beach [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	7,874
Initial Cost of Buildings & Improvements	5,641
Costs Capitalized Subsequent to Acquisition	443
Gross carrying amount, Land	7,874
Gross carrying amount, Building & Improvements	6,084
Total	13,958
Accumulated Depreciation	$ 1,347
Los Angeles [Member] | Shoemaker [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	4,759
Initial Cost of Buildings & Improvements	1,099
Costs Capitalized Subsequent to Acquisition	25
Gross carrying amount, Land	4,759
Gross carrying amount, Building & Improvements	1,124
Total	5,883
Accumulated Depreciation	$ 43
Los Angeles [Member] | Slauson [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	4,679
Initial Cost of Buildings & Improvements	697
Costs Capitalized Subsequent to Acquisition	45
Gross carrying amount, Land	4,679
Gross carrying amount, Building & Improvements	742
Total	5,421
Accumulated Depreciation	$ 8
Los Angeles [Member] | South Main [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	16,371
Initial Cost of Buildings & Improvements	7,045
Costs Capitalized Subsequent to Acquisition	17,043
Gross carrying amount, Land	16,371
Gross carrying amount, Building & Improvements	24,088
Total	40,459
Accumulated Depreciation	$ 6,122
Los Angeles [Member] | South Main III [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	11,521
Initial Cost of Buildings & Improvements	12,467
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	11,521
Gross carrying amount, Building & Improvements	12,467
Total	23,988
Accumulated Depreciation	$ 849
Los Angeles [Member] | Telegraph Springs [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	7,063
Initial Cost of Buildings & Improvements	7,236
Costs Capitalized Subsequent to Acquisition	241
Gross carrying amount, Land	7,063
Gross carrying amount, Building & Improvements	7,477
Total	14,540
Accumulated Depreciation	$ 529
Los Angeles [Member] | Vermont [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	10,173
Initial Cost of Buildings & Improvements	7,105
Costs Capitalized Subsequent to Acquisition	221
Gross carrying amount, Land	10,173
Gross carrying amount, Building & Improvements	7,326
Total	17,499
Accumulated Depreciation	$ 365
Los Angeles [Member] | 1215 Walnut [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	6,130
Initial Cost of Buildings & Improvements	2,522
Costs Capitalized Subsequent to Acquisition	10
Gross carrying amount, Land	6,130
Gross carrying amount, Building & Improvements	2,532
Total	8,662
Accumulated Depreciation	$ 174
Los Angeles [Member] | Walnut II [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	6,097
Initial Cost of Buildings & Improvements	5,069
Costs Capitalized Subsequent to Acquisition	595
Gross carrying amount, Land	6,097
Gross carrying amount, Building & Improvements	5,664
Total	11,761
Accumulated Depreciation	$ 169
Northern New Jersey/New York City [Member] | 1 Dodge Drive [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,819
Initial Cost of Buildings & Improvements	2,982
Costs Capitalized Subsequent to Acquisition	1,628
Gross carrying amount, Land	3,819
Gross carrying amount, Building & Improvements	4,610
Total	8,429
Accumulated Depreciation	$ 1,459
Northern New Jersey/New York City [Member] | 17 Madison [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	974
Initial Cost of Buildings & Improvements	1,647
Costs Capitalized Subsequent to Acquisition	543
Gross carrying amount, Land	974
Gross carrying amount, Building & Improvements	2,190
Total	3,164
Accumulated Depreciation	$ 590
Northern New Jersey/New York City [Member] | 20 Pulaski [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,003
Initial Cost of Buildings & Improvements	4,946
Costs Capitalized Subsequent to Acquisition	1,201
Gross carrying amount, Land	4,003
Gross carrying amount, Building & Improvements	6,147
Total	10,150
Accumulated Depreciation	$ 1,235
Northern New Jersey/New York City [Member] | 22 Madison [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,365
Initial Cost of Buildings & Improvements	1,607
Costs Capitalized Subsequent to Acquisition	885
Gross carrying amount, Land	1,365
Gross carrying amount, Building & Improvements	2,492
Total	3,857
Accumulated Depreciation	$ 203
Northern New Jersey/New York City [Member] | 48th 3rd and 286 [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	12,061
Initial Cost of Buildings & Improvements	1,664
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	12,061
Gross carrying amount, Building & Improvements	1,664
Total	13,725
Accumulated Depreciation	$ 41
Northern New Jersey/New York City [Member] | 49th Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	21,674
Initial Cost of Buildings & Improvements	2,999
Costs Capitalized Subsequent to Acquisition	1,125
Gross carrying amount, Land	21,674
Gross carrying amount, Building & Improvements	4,124
Total	25,798
Accumulated Depreciation	$ 104
Northern New Jersey/New York City [Member] | 50 Kero [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	10,343
Initial Cost of Buildings & Improvements	3,876
Costs Capitalized Subsequent to Acquisition	3,100
Gross carrying amount, Land	10,343
Gross carrying amount, Building & Improvements	6,976
Total	17,319
Accumulated Depreciation	$ 455
Northern New Jersey/New York City [Member] | 51 Kero [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	3,236
Initial Cost of Buildings & Improvements	589
Costs Capitalized Subsequent to Acquisition	1
Gross carrying amount, Land	3,236
Gross carrying amount, Building & Improvements	590
Total	3,826
Accumulated Depreciation	$ 7
Northern New Jersey/New York City [Member] | 74th North Bergen [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,933
Initial Cost of Buildings & Improvements	1,817
Costs Capitalized Subsequent to Acquisition	353
Gross carrying amount, Land	2,933
Gross carrying amount, Building & Improvements	2,170
Total	5,103
Accumulated Depreciation	$ 255
Northern New Jersey/New York City [Member] | 81 First N Hackensack [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	25,901
Initial Cost of Buildings & Improvements	0
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	25,901
Gross carrying amount, Building & Improvements	0
Total	25,901
Accumulated Depreciation	$ 0
Northern New Jersey/New York City [Member] | 85 Doremus [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	5,918
Initial Cost of Buildings & Improvements	513
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	5,918
Gross carrying amount, Building & Improvements	513
Total	6,431
Accumulated Depreciation	$ 28
Northern New Jersey/New York City [Member] | 341 Michele [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,372
Initial Cost of Buildings & Improvements	4,798
Costs Capitalized Subsequent to Acquisition	891
Gross carrying amount, Land	2,372
Gross carrying amount, Building & Improvements	5,689
Total	8,061
Accumulated Depreciation	$ 993
Northern New Jersey/New York City [Member] | 422 Frelinghuysen [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	16,728
Initial Cost of Buildings & Improvements	0
Costs Capitalized Subsequent to Acquisition	6,781
Gross carrying amount, Land	16,728
Gross carrying amount, Building & Improvements	6,781
Total	23,509
Accumulated Depreciation	$ 317
Northern New Jersey/New York City [Member] | 465 Meadow [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	713
Initial Cost of Buildings & Improvements	1,618
Costs Capitalized Subsequent to Acquisition	229
Gross carrying amount, Land	713
Gross carrying amount, Building & Improvements	1,847
Total	2,560
Accumulated Depreciation	$ 378
Northern New Jersey/New York City [Member] | 550 Delancy [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	9,230
Initial Cost of Buildings & Improvements	4,855
Costs Capitalized Subsequent to Acquisition	1,970
Gross carrying amount, Land	9,230
Gross carrying amount, Building & Improvements	6,825
Total	16,055
Accumulated Depreciation	$ 1,237
Northern New Jersey/New York City [Member] | 620 Division [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	6,491
Initial Cost of Buildings & Improvements	3,568
Costs Capitalized Subsequent to Acquisition	3,405
Gross carrying amount, Land	6,491
Gross carrying amount, Building & Improvements	6,973
Total	13,464
Accumulated Depreciation	$ 2,708
Northern New Jersey/New York City [Member] | 7777 West Side [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,525
Initial Cost of Buildings & Improvements	8,856
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	4,525
Gross carrying amount, Building & Improvements	8,856
Total	13,381
Accumulated Depreciation	$ 616
Northern New Jersey/New York City [Member] | 900 Hart [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,202
Initial Cost of Buildings & Improvements	3,866
Costs Capitalized Subsequent to Acquisition	1,301
Gross carrying amount, Land	3,202
Gross carrying amount, Building & Improvements	5,167
Total	8,369
Accumulated Depreciation	$ 898
Northern New Jersey/New York City [Member] | 901 North [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	8,035
Initial Cost of Buildings & Improvements	913
Costs Capitalized Subsequent to Acquisition	829
Gross carrying amount, Land	8,035
Gross carrying amount, Building & Improvements	1,742
Total	9,777
Accumulated Depreciation	$ 352
Northern New Jersey/New York City [Member] | Avenue A [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	4
Encumbrances	$ 0
Initial Cost of Land	7,516
Initial Cost of Buildings & Improvements	4,660
Costs Capitalized Subsequent to Acquisition	684
Gross carrying amount, Land	7,516
Gross carrying amount, Building & Improvements	5,344
Total	12,860
Accumulated Depreciation	$ 476
Northern New Jersey/New York City [Member] | Belleville [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 11,728
Initial Cost of Land	12,845
Initial Cost of Buildings & Improvements	18,041
Costs Capitalized Subsequent to Acquisition	1,332
Gross carrying amount, Land	12,845
Gross carrying amount, Building & Improvements	19,373
Total	32,218
Accumulated Depreciation	$ 4,250
Northern New Jersey/New York City [Member] | Commerce [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,656
Initial Cost of Buildings & Improvements	1,544
Costs Capitalized Subsequent to Acquisition	128
Gross carrying amount, Land	1,656
Gross carrying amount, Building & Improvements	1,672
Total	3,328
Accumulated Depreciation	$ 54
Northern New Jersey/New York City [Member] | Dell [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	6,641
Initial Cost of Buildings & Improvements	771
Costs Capitalized Subsequent to Acquisition	548
Gross carrying amount, Land	6,641
Gross carrying amount, Building & Improvements	1,319
Total	7,960
Accumulated Depreciation	$ 243
Northern New Jersey/New York City [Member] | Ethel [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	2,748
Initial Cost of Buildings & Improvements	3,801
Costs Capitalized Subsequent to Acquisition	1,441
Gross carrying amount, Land	2,748
Gross carrying amount, Building & Improvements	5,242
Total	7,990
Accumulated Depreciation	$ 1,197
Northern New Jersey/New York City [Member] | Interstate [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	13,686
Initial Cost of Buildings & Improvements	12,135
Costs Capitalized Subsequent to Acquisition	11,104
Gross carrying amount, Land	13,686
Gross carrying amount, Building & Improvements	23,239
Total	36,925
Accumulated Depreciation	$ 5,582
Northern New Jersey/New York City [Member] | JFK Airgate [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	4
Encumbrances	$ 0
Initial Cost of Land	18,282
Initial Cost of Buildings & Improvements	32,933
Costs Capitalized Subsequent to Acquisition	4,928
Gross carrying amount, Land	18,282
Gross carrying amount, Building & Improvements	37,861
Total	56,143
Accumulated Depreciation	$ 7,596
Northern New Jersey/New York City [Member] | Manor [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,076
Initial Cost of Buildings & Improvements	5,262
Costs Capitalized Subsequent to Acquisition	1,674
Gross carrying amount, Land	4,076
Gross carrying amount, Building & Improvements	6,936
Total	11,012
Accumulated Depreciation	$ 878
Northern New Jersey/New York City [Member] | Melanie Lane [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	3
Encumbrances	$ 0
Initial Cost of Land	5,931
Initial Cost of Buildings & Improvements	13,178
Costs Capitalized Subsequent to Acquisition	2,932
Gross carrying amount, Land	5,931
Gross carrying amount, Building & Improvements	16,110
Total	22,041
Accumulated Depreciation	$ 3,344
Northern New Jersey/New York City [Member] | Middlebrook [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	18
Encumbrances	$ 0
Initial Cost of Land	16,442
Initial Cost of Buildings & Improvements	10,241
Costs Capitalized Subsequent to Acquisition	12,016
Gross carrying amount, Land	16,442
Gross carrying amount, Building & Improvements	22,257
Total	38,699
Accumulated Depreciation	$ 7,842
Northern New Jersey/New York City [Member] | Morgan [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	71,051
Initial Cost of Buildings & Improvements	10,888
Costs Capitalized Subsequent to Acquisition	203
Gross carrying amount, Land	71,051
Gross carrying amount, Building & Improvements	11,091
Total	82,142
Accumulated Depreciation	$ 106
Northern New Jersey/New York City [Member] | New Dutch [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,773
Initial Cost of Buildings & Improvements	2,004
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	4,773
Gross carrying amount, Building & Improvements	2,004
Total	6,777
Accumulated Depreciation	$ 160
Northern New Jersey/New York City [Member] | Paterson Plank [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,127
Initial Cost of Buildings & Improvements	455
Costs Capitalized Subsequent to Acquisition	88
Gross carrying amount, Land	4,127
Gross carrying amount, Building & Improvements	543
Total	4,670
Accumulated Depreciation	$ 79
Northern New Jersey/New York City [Member] | Schoolhouse [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,375
Initial Cost of Buildings & Improvements	5,705
Costs Capitalized Subsequent to Acquisition	295
Gross carrying amount, Land	2,375
Gross carrying amount, Building & Improvements	6,000
Total	8,375
Accumulated Depreciation	$ 589
Northern New Jersey/New York City [Member] | Stockton [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	12,327
Initial Cost of Buildings & Improvements	1,282
Costs Capitalized Subsequent to Acquisition	222
Gross carrying amount, Land	12,327
Gross carrying amount, Building & Improvements	1,504
Total	13,831
Accumulated Depreciation	$ 255
Northern New Jersey/New York City [Member] | Terminal Way [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	3,537
Initial Cost of Buildings & Improvements	3,598
Costs Capitalized Subsequent to Acquisition	124
Gross carrying amount, Land	3,537
Gross carrying amount, Building & Improvements	3,722
Total	7,259
Accumulated Depreciation	$ 507
Northern New Jersey/New York City [Member] | Whelan [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	6,366
Initial Cost of Buildings & Improvements	5,704
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	6,366
Gross carrying amount, Building & Improvements	5,704
Total	12,070
Accumulated Depreciation	$ 6
Northern New Jersey/New York City [Member] | Wilson [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,016
Initial Cost of Buildings & Improvements	484
Costs Capitalized Subsequent to Acquisition	813
Gross carrying amount, Land	2,016
Gross carrying amount, Building & Improvements	1,297
Total	3,313
Accumulated Depreciation	$ 235
Northern New Jersey/New York City [Member] | Woodside [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	23,987
Initial Cost of Buildings & Improvements	3,796
Costs Capitalized Subsequent to Acquisition	3,944
Gross carrying amount, Land	23,987
Gross carrying amount, Building & Improvements	7,740
Total	31,727
Accumulated Depreciation	$ 305
San Francisco Bay Area [Member] | 20th Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	18,092
Initial Cost of Buildings & Improvements	6,730
Costs Capitalized Subsequent to Acquisition	1,017
Gross carrying amount, Land	18,092
Gross carrying amount, Building & Improvements	7,747
Total	25,839
Accumulated Depreciation	$ 70
San Francisco Bay Area [Member] | 238/242 Lawrence [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	6,674
Initial Cost of Buildings & Improvements	2,655
Costs Capitalized Subsequent to Acquisition	1,546
Gross carrying amount, Land	6,674
Gross carrying amount, Building & Improvements	4,201
Total	10,875
Accumulated Depreciation	$ 1,412
San Francisco Bay Area [Member] | 240 Littlefield [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	5,107
Initial Cost of Buildings & Improvements	3,293
Costs Capitalized Subsequent to Acquisition	2,852
Gross carrying amount, Land	5,107
Gross carrying amount, Building & Improvements	6,145
Total	11,252
Accumulated Depreciation	$ 1,038
San Francisco Bay Area [Member] | 299 Lawrence [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,352
Initial Cost of Buildings & Improvements	1,198
Costs Capitalized Subsequent to Acquisition	423
Gross carrying amount, Land	1,352
Gross carrying amount, Building & Improvements	1,621
Total	2,973
Accumulated Depreciation	$ 620
San Francisco Bay Area [Member] | 631 Brennan [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,932
Initial Cost of Buildings & Improvements	2,245
Costs Capitalized Subsequent to Acquisition	561
Gross carrying amount, Land	1,932
Gross carrying amount, Building & Improvements	2,806
Total	4,738
Accumulated Depreciation	$ 691
San Francisco Bay Area [Member] | Ahern [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	3,246
Initial Cost of Buildings & Improvements	2,749
Costs Capitalized Subsequent to Acquisition	871
Gross carrying amount, Land	3,246
Gross carrying amount, Building & Improvements	3,620
Total	6,866
Accumulated Depreciation	$ 1,184
San Francisco Bay Area [Member] | Ahern II [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,467
Initial Cost of Buildings & Improvements	4,527
Costs Capitalized Subsequent to Acquisition	201
Gross carrying amount, Land	2,467
Gross carrying amount, Building & Improvements	4,728
Total	7,195
Accumulated Depreciation	$ 710
San Francisco Bay Area [Member] | Burroughs [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	3
Encumbrances	$ 0
Initial Cost of Land	5,400
Initial Cost of Buildings & Improvements	7,092
Costs Capitalized Subsequent to Acquisition	1,379
Gross carrying amount, Land	5,400
Gross carrying amount, Building & Improvements	8,471
Total	13,871
Accumulated Depreciation	$ 1,288
San Francisco Bay Area [Member] | Caribbean [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	3
Encumbrances	$ 0
Initial Cost of Land	17,483
Initial Cost of Buildings & Improvements	14,493
Costs Capitalized Subsequent to Acquisition	2,658
Gross carrying amount, Land	17,483
Gross carrying amount, Building & Improvements	17,151
Total	34,634
Accumulated Depreciation	$ 3,709
San Francisco Bay Area [Member] | Carlton Court [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,036
Initial Cost of Buildings & Improvements	1,475
Costs Capitalized Subsequent to Acquisition	162
Gross carrying amount, Land	2,036
Gross carrying amount, Building & Improvements	1,637
Total	3,673
Accumulated Depreciation	$ 421
San Francisco Bay Area [Member] | Clawiter [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 4,045
Initial Cost of Land	5,964
Initial Cost of Buildings & Improvements	1,159
Costs Capitalized Subsequent to Acquisition	167
Gross carrying amount, Land	5,964
Gross carrying amount, Building & Improvements	1,326
Total	7,290
Accumulated Depreciation	$ 247
San Francisco Bay Area [Member] | Hotchkiss [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,163
Initial Cost of Buildings & Improvements	3,152
Costs Capitalized Subsequent to Acquisition	865
Gross carrying amount, Land	4,163
Gross carrying amount, Building & Improvements	4,017
Total	8,180
Accumulated Depreciation	$ 291
San Francisco Bay Area [Member] | Hitchkiss II [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,042
Initial Cost of Buildings & Improvements	3,081
Costs Capitalized Subsequent to Acquisition	347
Gross carrying amount, Land	3,042
Gross carrying amount, Building & Improvements	3,428
Total	6,470
Accumulated Depreciation	$ 87
San Francisco Bay Area [Member] | Merced [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	4
Encumbrances	$ 0
Initial Cost of Land	25,621
Initial Cost of Buildings & Improvements	9,318
Costs Capitalized Subsequent to Acquisition	576
Gross carrying amount, Land	25,621
Gross carrying amount, Building & Improvements	9,894
Total	35,515
Accumulated Depreciation	$ 484
San Francisco Bay Area [Member] | 221 Michele [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,710
Initial Cost of Buildings & Improvements	2,540
Costs Capitalized Subsequent to Acquisition	659
Gross carrying amount, Land	2,710
Gross carrying amount, Building & Improvements	3,199
Total	5,909
Accumulated Depreciation	$ 309
San Francisco Bay Area [Member] | Minnesota and Tennessee [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	34,738
Initial Cost of Buildings & Improvements	13,141
Costs Capitalized Subsequent to Acquisition	190
Gross carrying amount, Land	34,738
Gross carrying amount, Building & Improvements	13,331
Total	48,069
Accumulated Depreciation	$ 112
San Francisco Bay Area [Member] | San Clemente [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	5,126
Initial Cost of Buildings & Improvements	3,938
Costs Capitalized Subsequent to Acquisition	138
Gross carrying amount, Land	5,126
Gross carrying amount, Building & Improvements	4,076
Total	9,202
Accumulated Depreciation	$ 146
San Francisco Bay Area [Member] | West 140th [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	9,578
Initial Cost of Buildings & Improvements	6,297
Costs Capitalized Subsequent to Acquisition	3,745
Gross carrying amount, Land	9,578
Gross carrying amount, Building & Improvements	10,042
Total	19,620
Accumulated Depreciation	$ 996
San Francisco Bay Area [Member] | Whitney [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	3
Encumbrances	$ 0
Initial Cost of Land	13,821
Initial Cost of Buildings & Improvements	9,016
Costs Capitalized Subsequent to Acquisition	2,123
Gross carrying amount, Land	13,821
Gross carrying amount, Building & Improvements	11,139
Total	24,960
Accumulated Depreciation	$ 533
San Francisco Bay Area [Member] | Wicks [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,224
Initial Cost of Buildings & Improvements	298
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	2,224
Gross carrying amount, Building & Improvements	298
Total	2,522
Accumulated Depreciation	$ 15
San Francisco Bay Area [Member] | Central Pacific Business Park I [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	3
Encumbrances	$ 0
Initial Cost of Land	8,468
Initial Cost of Buildings & Improvements	14,165
Costs Capitalized Subsequent to Acquisition	1,061
Gross carrying amount, Land	8,468
Gross carrying amount, Building & Improvements	15,226
Total	23,694
Accumulated Depreciation	$ 2,381
San Francisco Bay Area [Member] | Central Pacific Business Park II [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	4
Encumbrances	$ 0
Initial Cost of Land	13,642
Initial Cost of Buildings & Improvements	23,658
Costs Capitalized Subsequent to Acquisition	5,219
Gross carrying amount, Land	13,642
Gross carrying amount, Building & Improvements	28,877
Total	42,519
Accumulated Depreciation	$ 4,732
Seattle [Member] | 79th Ave South [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,267
Initial Cost of Buildings & Improvements	1,503
Costs Capitalized Subsequent to Acquisition	594
Gross carrying amount, Land	1,267
Gross carrying amount, Building & Improvements	2,097
Total	3,364
Accumulated Depreciation	$ 428
Seattle [Member] | 917 Valley [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,203
Initial Cost of Buildings & Improvements	4,551
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	2,203
Gross carrying amount, Building & Improvements	4,551
Total	6,754
Accumulated Depreciation	$ 5
Seattle [Member] | 3401 Lind [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,999
Initial Cost of Buildings & Improvements	6,707
Costs Capitalized Subsequent to Acquisition	465
Gross carrying amount, Land	2,999
Gross carrying amount, Building & Improvements	7,172
Total	10,171
Accumulated Depreciation	$ 1,045
Seattle [Member] | 4225 2nd Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,236
Initial Cost of Buildings & Improvements	4,049
Costs Capitalized Subsequent to Acquisition	2,012
Gross carrying amount, Land	4,236
Gross carrying amount, Building & Improvements	6,061
Total	10,297
Accumulated Depreciation	$ 790
Seattle [Member] | 4930 3rd Avenue South [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,984
Initial Cost of Buildings & Improvements	2,424
Costs Capitalized Subsequent to Acquisition	783
Gross carrying amount, Land	3,984
Gross carrying amount, Building & Improvements	3,207
Total	7,191
Accumulated Depreciation	$ 364
Seattle [Member] | 17600 West Valley Highway [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,361
Initial Cost of Buildings & Improvements	5,260
Costs Capitalized Subsequent to Acquisition	1,193
Gross carrying amount, Land	3,361
Gross carrying amount, Building & Improvements	6,453
Total	9,814
Accumulated Depreciation	$ 1,630
Seattle [Member] | Auburn 400 [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,415
Initial Cost of Buildings & Improvements	5,234
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	4,415
Gross carrying amount, Building & Improvements	5,234
Total	9,649
Accumulated Depreciation	$ 52
Seattle [Member] | Auburn 1307 [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,253
Initial Cost of Buildings & Improvements	5,034
Costs Capitalized Subsequent to Acquisition	249
Gross carrying amount, Land	4,253
Gross carrying amount, Building & Improvements	5,283
Total	9,536
Accumulated Depreciation	$ 867
Seattle [Member] | Dawson [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,902
Initial Cost of Buildings & Improvements	278
Costs Capitalized Subsequent to Acquisition	396
Gross carrying amount, Land	3,902
Gross carrying amount, Building & Improvements	674
Total	4,576
Accumulated Depreciation	$ 41
Seattle [Member] | Denver [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,203
Initial Cost of Buildings & Improvements	1,345
Costs Capitalized Subsequent to Acquisition	489
Gross carrying amount, Land	3,203
Gross carrying amount, Building & Improvements	1,834
Total	5,037
Accumulated Depreciation	$ 278
Seattle [Member] | East Valley [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,693
Initial Cost of Buildings & Improvements	2,959
Costs Capitalized Subsequent to Acquisition	40
Gross carrying amount, Land	2,693
Gross carrying amount, Building & Improvements	2,999
Total	5,692
Accumulated Depreciation	$ 126
Seattle [Member] | East Marginal [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	2,618
Initial Cost of Buildings & Improvements	380
Costs Capitalized Subsequent to Acquisition	0
Gross carrying amount, Land	2,618
Gross carrying amount, Building & Improvements	380
Total	2,998
Accumulated Depreciation	$ 1
Seattle [Member] | Hanford [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,821
Initial Cost of Buildings & Improvements	2,250
Costs Capitalized Subsequent to Acquisition	471
Gross carrying amount, Land	3,821
Gross carrying amount, Building & Improvements	2,721
Total	6,542
Accumulated Depreciation	$ 176
Seattle [Member] | Kent 188 [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,251
Initial Cost of Buildings & Improvements	4,719
Costs Capitalized Subsequent to Acquisition	1,248
Gross carrying amount, Land	3,251
Gross carrying amount, Building & Improvements	5,967
Total	9,218
Accumulated Depreciation	$ 1,737
Seattle [Member] | Kent 190 [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,560
Initial Cost of Buildings & Improvements	5,561
Costs Capitalized Subsequent to Acquisition	355
Gross carrying amount, Land	4,560
Gross carrying amount, Building & Improvements	5,916
Total	10,476
Accumulated Depreciation	$ 840
Seattle [Member] | Kent 202 [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	5,761
Initial Cost of Buildings & Improvements	9,114
Costs Capitalized Subsequent to Acquisition	2,810
Gross carrying amount, Land	5,761
Gross carrying amount, Building & Improvements	11,924
Total	17,685
Accumulated Depreciation	$ 1,709
Seattle [Member] | Kent 216th [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,672
Initial Cost of Buildings & Improvements	5,408
Costs Capitalized Subsequent to Acquisition	912
Gross carrying amount, Land	3,672
Gross carrying amount, Building & Improvements	6,320
Total	9,992
Accumulated Depreciation	$ 1,104
Seattle [Member] | Kent Corporate Park [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	4
Encumbrances	$ 0
Initial Cost of Land	5,032
Initial Cost of Buildings & Improvements	6,916
Costs Capitalized Subsequent to Acquisition	1,907
Gross carrying amount, Land	5,032
Gross carrying amount, Building & Improvements	8,823
Total	13,855
Accumulated Depreciation	$ 1,269
Seattle [Member] | Lucile [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,498
Initial Cost of Buildings & Improvements	3,504
Costs Capitalized Subsequent to Acquisition	1,342
Gross carrying amount, Land	4,498
Gross carrying amount, Building & Improvements	4,846
Total	9,344
Accumulated Depreciation	$ 586
Seattle [Member] | Lund [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,573
Initial Cost of Buildings & Improvements	4,399
Costs Capitalized Subsequent to Acquisition	82
Gross carrying amount, Land	2,573
Gross carrying amount, Building & Improvements	4,481
Total	7,054
Accumulated Depreciation	$ 467
Seattle [Member] | Olympic [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,499
Initial Cost of Buildings & Improvements	1,431
Costs Capitalized Subsequent to Acquisition	536
Gross carrying amount, Land	1,499
Gross carrying amount, Building & Improvements	1,967
Total	3,466
Accumulated Depreciation	$ 432
Seattle [Member] | SeaTac 8th Ave [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,501
Initial Cost of Buildings & Improvements	4,020
Costs Capitalized Subsequent to Acquisition	1,150
Gross carrying amount, Land	2,501
Gross carrying amount, Building & Improvements	5,170
Total	7,671
Accumulated Depreciation	$ 1,142
Seattle [Member] | SW 34th [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,912
Initial Cost of Buildings & Improvements	3,289
Costs Capitalized Subsequent to Acquisition	498
Gross carrying amount, Land	2,912
Gross carrying amount, Building & Improvements	3,787
Total	6,699
Accumulated Depreciation	$ 632
Seattle [Member] | Valley Corporate [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 7,242
Initial Cost of Land	5,264
Initial Cost of Buildings & Improvements	9,096
Costs Capitalized Subsequent to Acquisition	1,991
Gross carrying amount, Land	5,264
Gross carrying amount, Building & Improvements	11,087
Total	16,351
Accumulated Depreciation	$ 2,567
Miami [Member] | 26th Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,444
Initial Cost of Buildings & Improvements	4,558
Costs Capitalized Subsequent to Acquisition	1,178
Gross carrying amount, Land	3,444
Gross carrying amount, Building & Improvements	5,736
Total	9,180
Accumulated Depreciation	$ 956
Miami [Member] | 48th Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	4,322
Initial Cost of Buildings & Improvements	2,187
Costs Capitalized Subsequent to Acquisition	574
Gross carrying amount, Land	4,322
Gross carrying amount, Building & Improvements	2,761
Total	7,083
Accumulated Depreciation	$ 547
Miami [Member] | 60th Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	6,203
Initial Cost of Buildings & Improvements	1,567
Costs Capitalized Subsequent to Acquisition	7,346
Gross carrying amount, Land	6,203
Gross carrying amount, Building & Improvements	8,913
Total	15,116
Accumulated Depreciation	$ 3,091
Miami [Member] | 70th Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,434
Initial Cost of Buildings & Improvements	2,333
Costs Capitalized Subsequent to Acquisition	198
Gross carrying amount, Land	1,434
Gross carrying amount, Building & Improvements	2,531
Total	3,965
Accumulated Depreciation	$ 596
Miami [Member] | 70th Avenue II [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,152
Initial Cost of Buildings & Improvements	3,418
Costs Capitalized Subsequent to Acquisition	524
Gross carrying amount, Land	2,152
Gross carrying amount, Building & Improvements	3,942
Total	6,094
Accumulated Depreciation	$ 400
Miami [Member] | 70th Avenue III [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,543
Initial Cost of Buildings & Improvements	3,167
Costs Capitalized Subsequent to Acquisition	690
Gross carrying amount, Land	2,543
Gross carrying amount, Building & Improvements	3,857
Total	6,400
Accumulated Depreciation	$ 319
Miami [Member] | 70th Avenue IV [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,119
Initial Cost of Buildings & Improvements	1,456
Costs Capitalized Subsequent to Acquisition	151
Gross carrying amount, Land	1,119
Gross carrying amount, Building & Improvements	1,607
Total	2,726
Accumulated Depreciation	$ 125
Miami [Member] | 70th Avenue V [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	5,036
Initial Cost of Buildings & Improvements	3,419
Costs Capitalized Subsequent to Acquisition	1,526
Gross carrying amount, Land	5,036
Gross carrying amount, Building & Improvements	4,945
Total	9,981
Accumulated Depreciation	$ 149
Miami [Member] | 74th Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,327
Initial Cost of Buildings & Improvements	3,538
Costs Capitalized Subsequent to Acquisition	614
Gross carrying amount, Land	2,327
Gross carrying amount, Building & Improvements	4,152
Total	6,479
Accumulated Depreciation	$ 363
Miami [Member] | 78th Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,445
Initial Cost of Buildings & Improvements	1,755
Costs Capitalized Subsequent to Acquisition	2,604
Gross carrying amount, Land	2,445
Gross carrying amount, Building & Improvements	4,359
Total	6,804
Accumulated Depreciation	$ 1,121
Miami [Member] | 81st Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	2
Encumbrances	$ 0
Initial Cost of Land	2,938
Initial Cost of Buildings & Improvements	5,242
Costs Capitalized Subsequent to Acquisition	1,311
Gross carrying amount, Land	2,938
Gross carrying amount, Building & Improvements	6,553
Total	9,491
Accumulated Depreciation	$ 1,040
Miami [Member] | 94th Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,000
Initial Cost of Buildings & Improvements	3,580
Costs Capitalized Subsequent to Acquisition	336
Gross carrying amount, Land	3,000
Gross carrying amount, Building & Improvements	3,916
Total	6,916
Accumulated Depreciation	$ 247
Miami [Member] | 107th Avenue [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,787
Initial Cost of Buildings & Improvements	2,036
Costs Capitalized Subsequent to Acquisition	506
Gross carrying amount, Land	2,787
Gross carrying amount, Building & Improvements	2,542
Total	5,329
Accumulated Depreciation	$ 608
Miami [Member] | 101st Road [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,647
Initial Cost of Buildings & Improvements	3,258
Costs Capitalized Subsequent to Acquisition	468
Gross carrying amount, Land	2,647
Gross carrying amount, Building & Improvements	3,726
Total	6,373
Accumulated Depreciation	$ 781
Miami [Member] | 131st Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,903
Initial Cost of Buildings & Improvements	5,729
Costs Capitalized Subsequent to Acquisition	500
Gross carrying amount, Land	2,903
Gross carrying amount, Building & Improvements	6,229
Total	9,132
Accumulated Depreciation	$ 1,026
Miami [Member] | 12950 SW South River [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,971
Initial Cost of Buildings & Improvements	4,029
Costs Capitalized Subsequent to Acquisition	368
Gross carrying amount, Land	1,971
Gross carrying amount, Building & Improvements	4,397
Total	6,368
Accumulated Depreciation	$ 429
Miami [Member] | Americas Gateway [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	6
Encumbrances	$ 0
Initial Cost of Land	11,152
Initial Cost of Buildings & Improvements	11,721
Costs Capitalized Subsequent to Acquisition	3,276
Gross carrying amount, Land	11,152
Gross carrying amount, Building & Improvements	14,997
Total	26,149
Accumulated Depreciation	$ 3,402
Miami [Member] | Miami International Trade Center [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	4
Encumbrances	$ 0
Initial Cost of Land	5,063
Initial Cost of Buildings & Improvements	10,958
Costs Capitalized Subsequent to Acquisition	1,260
Gross carrying amount, Land	5,063
Gross carrying amount, Building & Improvements	12,218
Total	17,281
Accumulated Depreciation	$ 1,623
Washington D.C. [Member] | 75th Ave [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	5
Encumbrances	$ 0
Initial Cost of Land	10,658
Initial Cost of Buildings & Improvements	18,615
Costs Capitalized Subsequent to Acquisition	4,226
Gross carrying amount, Land	10,658
Gross carrying amount, Building & Improvements	22,829
Total	33,487
Accumulated Depreciation	$ 3,457
Washington D.C. [Member] | 2920 V Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,248
Initial Cost of Buildings & Improvements	1,670
Costs Capitalized Subsequent to Acquisition	1,499
Gross carrying amount, Land	2,248
Gross carrying amount, Building & Improvements	3,169
Total	5,417
Accumulated Depreciation	$ 223
Washington D.C. [Member] | 3601 Pennsy [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	2,331
Initial Cost of Buildings & Improvements	4,375
Costs Capitalized Subsequent to Acquisition	1,425
Gross carrying amount, Land	2,331
Gross carrying amount, Building & Improvements	5,800
Total	8,131
Accumulated Depreciation	$ 966
Washington D.C. [Member] | 4230 Forbes [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,736
Initial Cost of Buildings & Improvements	2,395
Costs Capitalized Subsequent to Acquisition	853
Gross carrying amount, Land	1,736
Gross carrying amount, Building & Improvements	3,248
Total	4,984
Accumulated Depreciation	$ 511
Washington D.C. [Member] | 9070 Junction [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,538
Initial Cost of Buildings & Improvements	6,670
Costs Capitalized Subsequent to Acquisition	2,838
Gross carrying amount, Land	3,538
Gross carrying amount, Building & Improvements	9,508
Total	13,046
Accumulated Depreciation	$ 2,099
Washington D.C. [Member] | Business Parkway [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	3,038
Initial Cost of Buildings & Improvements	3,007
Costs Capitalized Subsequent to Acquisition	4
Gross carrying amount, Land	3,038
Gross carrying amount, Building & Improvements	3,011
Total	6,049
Accumulated Depreciation	$ 261
Washington D.C. [Member] | Hampton Overlook [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	3
Encumbrances	$ 0
Initial Cost of Land	4,602
Initial Cost of Buildings & Improvements	7,521
Costs Capitalized Subsequent to Acquisition	826
Gross carrying amount, Land	4,602
Gross carrying amount, Building & Improvements	8,347
Total	12,949
Accumulated Depreciation	$ 804
Washington D.C. [Member] | New Ridge [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	0
Encumbrances	$ 0
Initial Cost of Land	5,689
Initial Cost of Buildings & Improvements	1,567
Costs Capitalized Subsequent to Acquisition	190
Gross carrying amount, Land	5,689
Gross carrying amount, Building & Improvements	1,757
Total	7,446
Accumulated Depreciation	$ 178
Washington D.C. [Member] | Parkway [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	4,543
Initial Cost of Buildings & Improvements	12,094
Costs Capitalized Subsequent to Acquisition	372
Gross carrying amount, Land	4,543
Gross carrying amount, Building & Improvements	12,466
Total	17,009
Accumulated Depreciation	$ 2,062
Washington D.C. [Member] | Troy Hill [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	1
Encumbrances	$ 0
Initial Cost of Land	1,409
Initial Cost of Buildings & Improvements	5,033
Costs Capitalized Subsequent to Acquisition	495
Gross carrying amount, Land	1,409
Gross carrying amount, Building & Improvements	5,528
Total	6,937
Accumulated Depreciation	$ 1,140
Washington D.C. [Member] | V Street [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
No. of Bldgs. | property	6
Encumbrances	$ 0
Initial Cost of Land	67,132
Initial Cost of Buildings & Improvements	41,299
Costs Capitalized Subsequent to Acquisition	13,342
Gross carrying amount, Land	67,132
Gross carrying amount, Building & Improvements	54,641
Total	121,773
Accumulated Depreciation	$ 8,187