Schedule III Real Estate And Accumulated Depreciation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 property	Feb. 11, 2015 property
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	126	11
Encumbrances	$ 103,898
Initial Cost of Land	390,548
Initial Cost of Buildings and Improvements	425,833
Costs Capitalized Subsequent to Acquisition	48,362
Gross carrying amount as of 12/31/14, Land	390,548
Gross carrying amount as of 12/31/14, Building & Improvements	474,195
Gross carrying amount as of 12/31/14, Total	864,743
Accumulated Depreciation	26,343
Unamortized net premiums	603
Intangible assets	43,492
Amortization of Intangible Assets	19,750
Encumbrances net	104,501
Gross carrying amount carried, net	908,235
Accumulated depreciation total	46,093
Los Angeles [Member] | 630 Glasgow [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Inglewood, CA
Encumbrances	2,321
Initial Cost of Land	2,245
Initial Cost of Buildings and Improvements	1,855
Costs Capitalized Subsequent to Acquisition	363
Gross carrying amount as of 12/31/14, Land	2,245
Gross carrying amount as of 12/31/14, Building & Improvements	2,218
Gross carrying amount as of 12/31/14, Total	4,463
Accumulated Depreciation	266
Year Acquired	2011
Year Constructed	1988
Los Angeles [Member] | 747 Glasgow [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Inglewood, CA
Initial Cost of Land	1,759
Initial Cost of Buildings and Improvements	1,555
Costs Capitalized Subsequent to Acquisition	62
Gross carrying amount as of 12/31/14, Land	1,759
Gross carrying amount as of 12/31/14, Building & Improvements	1,617
Gross carrying amount as of 12/31/14, Total	3,376
Accumulated Depreciation	32
Year Acquired	2014
Year Constructed	1981
Los Angeles [Member] | 14605 Miller [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Fontana, CA
Initial Cost of Land	8,695
Initial Cost of Buildings and Improvements	12,945
Gross carrying amount as of 12/31/14, Land	8,695
Gross carrying amount as of 12/31/14, Building & Improvements	12,945
Gross carrying amount as of 12/31/14, Total	21,640
Accumulated Depreciation	14
Year Acquired	2014
Year Constructed	1990
Los Angeles [Member] | 14611 Broadway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Gardena, CA
Initial Cost of Land	4,757
Initial Cost of Buildings and Improvements	1,243
Costs Capitalized Subsequent to Acquisition	613
Gross carrying amount as of 12/31/14, Land	4,757
Gross carrying amount as of 12/31/14, Building & Improvements	1,856
Gross carrying amount as of 12/31/14, Total	6,613
Accumulated Depreciation	93
Year Acquired	2013
Year Constructed	1962
Los Angeles [Member] | 19601 Hamilton [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Torrance, CA
Encumbrances	6,378
Initial Cost of Land	7,409
Initial Cost of Buildings and Improvements	4,072
Costs Capitalized Subsequent to Acquisition	8
Gross carrying amount as of 12/31/14, Land	7,409
Gross carrying amount as of 12/31/14, Building & Improvements	4,080
Gross carrying amount as of 12/31/14, Total	11,489
Accumulated Depreciation	352
Year Acquired	2011
Year Constructed	1985
Los Angeles [Member] | California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Corona, CA
Initial Cost of Land	3,225
Initial Cost of Buildings and Improvements	4,416
Costs Capitalized Subsequent to Acquisition	4
Gross carrying amount as of 12/31/14, Land	3,225
Gross carrying amount as of 12/31/14, Building & Improvements	4,420
Gross carrying amount as of 12/31/14, Total	7,645
Accumulated Depreciation	65
Year Acquired	2014
Year Constructed	1994
Los Angeles [Member] | Garfield [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	5
Location	Commerce, CA
Encumbrances	24,627
Initial Cost of Land	27,539
Initial Cost of Buildings and Improvements	22,694
Costs Capitalized Subsequent to Acquisition	951
Gross carrying amount as of 12/31/14, Land	27,539
Gross carrying amount as of 12/31/14, Building & Improvements	23,645
Gross carrying amount as of 12/31/14, Total	51,184
Accumulated Depreciation	1,849
Year Acquired	2012
Year Constructed	2002
Los Angeles [Member] | Las Hermanas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Compton, CA
Initial Cost of Land	3,330
Initial Cost of Buildings and Improvements	751
Costs Capitalized Subsequent to Acquisition	178
Gross carrying amount as of 12/31/14, Land	3,330
Gross carrying amount as of 12/31/14, Building & Improvements	929
Gross carrying amount as of 12/31/14, Total	4,259
Accumulated Depreciation	17
Year Acquired	2014
Year Constructed	1970
Los Angeles [Member] | Manhattan Beach [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Redondo Beach, CA
Initial Cost of Land	7,874
Initial Cost of Buildings and Improvements	5,641
Costs Capitalized Subsequent to Acquisition	53
Gross carrying amount as of 12/31/14, Land	7,874
Gross carrying amount as of 12/31/14, Building & Improvements	5,694
Gross carrying amount as of 12/31/14, Total	13,568
Accumulated Depreciation	372
Year Acquired	2012
Los Angeles [Member] | South Main [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	3
Location	Carson, CA
Initial Cost of Land	10,072
Initial Cost of Buildings and Improvements	4,849
Gross carrying amount as of 12/31/14, Land	10,072
Gross carrying amount as of 12/31/14, Building & Improvements	4,849
Gross carrying amount as of 12/31/14, Total	14,921
Accumulated Depreciation	272
Year Acquired	2012
Year Constructed	1966
Los Angeles [Member] | South Main II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Carson, CA
Initial Cost of Land	6,299
Initial Cost of Buildings and Improvements	2,196
Gross carrying amount as of 12/31/14, Land	6,299
Gross carrying amount as of 12/31/14, Building & Improvements	2,196
Gross carrying amount as of 12/31/14, Total	8,495
Accumulated Depreciation	30
Year Acquired	2014
Los Angeles [Member] | Whittier [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Whittier, CA
Initial Cost of Land	7,736
Initial Cost of Buildings and Improvements	7,902
Costs Capitalized Subsequent to Acquisition	412
Gross carrying amount as of 12/31/14, Land	7,736
Gross carrying amount as of 12/31/14, Building & Improvements	8,314
Gross carrying amount as of 12/31/14, Total	16,050
Accumulated Depreciation	597
Year Acquired	2012
Year Constructed	2004
Northern New Jersey/New York City [Member] | 1 Dodge Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	West Caldwell, NJ
Initial Cost of Land	3,819
Initial Cost of Buildings and Improvements	2,982
Costs Capitalized Subsequent to Acquisition	581
Gross carrying amount as of 12/31/14, Land	3,819
Gross carrying amount as of 12/31/14, Building & Improvements	3,563
Gross carrying amount as of 12/31/14, Total	7,382
Accumulated Depreciation	135
Year Acquired	2013
Year Constructed	1985
Northern New Jersey/New York City [Member] | 17 Madison [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Fairfield, NJ
Initial Cost of Land	974
Initial Cost of Buildings and Improvements	1,647
Costs Capitalized Subsequent to Acquisition	65
Gross carrying amount as of 12/31/14, Land	974
Gross carrying amount as of 12/31/14, Building & Improvements	1,712
Gross carrying amount as of 12/31/14, Total	2,686
Accumulated Depreciation	70
Year Acquired	2013
Year Constructed	1979
Northern New Jersey/New York City [Member] | Interstate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	South Brunswick, NJ
Initial Cost of Land	13,686
Initial Cost of Buildings and Improvements	12,135
Costs Capitalized Subsequent to Acquisition	8,914
Gross carrying amount as of 12/31/14, Land	13,686
Gross carrying amount as of 12/31/14, Building & Improvements	21,049
Gross carrying amount as of 12/31/14, Total	34,735
Accumulated Depreciation	1,491
Year Acquired	2010
Northern New Jersey/New York City [Member] | Pulaski [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Bayonne, NJ
Initial Cost of Land	4,003
Initial Cost of Buildings and Improvements	4,946
Costs Capitalized Subsequent to Acquisition	116
Gross carrying amount as of 12/31/14, Land	4,003
Gross carrying amount as of 12/31/14, Building & Improvements	5,062
Gross carrying amount as of 12/31/14, Total	9,065
Accumulated Depreciation	104
Year Acquired	2014
Year Constructed	1965
Northern New Jersey/New York City [Member] | 341 Michele [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Carlstadt, NJ
Initial Cost of Land	2,372
Initial Cost of Buildings and Improvements	4,798
Costs Capitalized Subsequent to Acquisition	76
Gross carrying amount as of 12/31/14, Land	2,372
Gross carrying amount as of 12/31/14, Building & Improvements	4,874
Gross carrying amount as of 12/31/14, Total	7,246
Accumulated Depreciation	150
Year Acquired	2013
Year Constructed	1973
Northern New Jersey/New York City [Member] | 465 Meadow [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Carlstadt, NJ
Initial Cost of Land	713
Initial Cost of Buildings and Improvements	1,618
Gross carrying amount as of 12/31/14, Land	713
Gross carrying amount as of 12/31/14, Building & Improvements	1,618
Gross carrying amount as of 12/31/14, Total	2,331
Accumulated Depreciation	50
Year Acquired	2013
Year Constructed	1972
Northern New Jersey/New York City [Member] | 550 Delancy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Newark, NJ
Initial Cost of Land	9,230
Initial Cost of Buildings and Improvements	4,855
Costs Capitalized Subsequent to Acquisition	10
Gross carrying amount as of 12/31/14, Land	9,230
Gross carrying amount as of 12/31/14, Building & Improvements	4,865
Gross carrying amount as of 12/31/14, Total	14,095
Accumulated Depreciation	214
Year Acquired	2013
Year Constructed	1987
Northern New Jersey/New York City [Member] | 620 Division [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Elizabeth, NJ
Encumbrances	6,335
Initial Cost of Land	6,491
Initial Cost of Buildings and Improvements	3,568
Costs Capitalized Subsequent to Acquisition	2,981
Gross carrying amount as of 12/31/14, Land	6,491
Gross carrying amount as of 12/31/14, Building & Improvements	6,549
Gross carrying amount as of 12/31/14, Total	13,040
Accumulated Depreciation	627
Year Acquired	2011
Year Constructed	1980
Northern New Jersey/New York City [Member] | 900 Hart [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Piscataway, NJ
Initial Cost of Land	3,202
Initial Cost of Buildings and Improvements	3,866
Costs Capitalized Subsequent to Acquisition	186
Gross carrying amount as of 12/31/14, Land	3,202
Gross carrying amount as of 12/31/14, Building & Improvements	4,052
Gross carrying amount as of 12/31/14, Total	7,254
Accumulated Depreciation	22
Year Acquired	2014
Year Constructed	1983
Northern New Jersey/New York City [Member] | Belleville [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Kearny, NJ
Encumbrances	13,670
Initial Cost of Land	12,845
Initial Cost of Buildings and Improvements	18,041
Costs Capitalized Subsequent to Acquisition	68
Gross carrying amount as of 12/31/14, Land	12,845
Gross carrying amount as of 12/31/14, Building & Improvements	18,109
Gross carrying amount as of 12/31/14, Total	30,954
Accumulated Depreciation	1,642
Year Acquired	2011
Year Constructed	2006
Northern New Jersey/New York City [Member] | Dell [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Carlstadt, NJ
Initial Cost of Land	6,641
Initial Cost of Buildings and Improvements	771
Costs Capitalized Subsequent to Acquisition	23
Gross carrying amount as of 12/31/14, Land	6,641
Gross carrying amount as of 12/31/14, Building & Improvements	794
Gross carrying amount as of 12/31/14, Total	7,435
Accumulated Depreciation	68
Year Acquired	2011
Year Constructed	1972
Northern New Jersey/New York City [Member] | Ethel [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Piscataway, NJ
Initial Cost of Land	2,748
Initial Cost of Buildings and Improvements	3,801
Costs Capitalized Subsequent to Acquisition	865
Gross carrying amount as of 12/31/14, Land	2,748
Gross carrying amount as of 12/31/14, Building & Improvements	4,666
Gross carrying amount as of 12/31/14, Total	7,414
Accumulated Depreciation	148
Year Acquired	2013
Northern New Jersey/New York City [Member] | JFK Airgate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	4
Location	Queens, NY
Initial Cost of Land	18,282
Initial Cost of Buildings and Improvements	32,933
Costs Capitalized Subsequent to Acquisition	58
Gross carrying amount as of 12/31/14, Land	18,282
Gross carrying amount as of 12/31/14, Building & Improvements	32,991
Gross carrying amount as of 12/31/14, Total	51,273
Accumulated Depreciation	1,002
Year Acquired	2013
Northern New Jersey/New York City [Member] | Melanie Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	3
Location	East Hanover, NJ
Initial Cost of Land	5,931
Initial Cost of Buildings and Improvements	13,178
Costs Capitalized Subsequent to Acquisition	481
Gross carrying amount as of 12/31/14, Land	5,931
Gross carrying amount as of 12/31/14, Building & Improvements	13,659
Gross carrying amount as of 12/31/14, Total	19,590
Accumulated Depreciation	484
Year Acquired	2013
Northern New Jersey/New York City [Member] | Middlebrook [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	18
Location	Bound Brook, NJ
Encumbrances	13,350
Initial Cost of Land	16,442
Initial Cost of Buildings and Improvements	10,241
Costs Capitalized Subsequent to Acquisition	6,066
Gross carrying amount as of 12/31/14, Land	16,442
Gross carrying amount as of 12/31/14, Building & Improvements	16,307
Gross carrying amount as of 12/31/14, Total	32,749
Accumulated Depreciation	2,614
Year Acquired	2010
Northern New Jersey/New York City [Member] | Terminal Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Avenel, NJ
Initial Cost of Land	3,537
Initial Cost of Buildings and Improvements	3,598
Gross carrying amount as of 12/31/14, Land	3,537
Gross carrying amount as of 12/31/14, Building & Improvements	3,598
Gross carrying amount as of 12/31/14, Total	7,135
Accumulated Depreciation	12
Year Acquired	2014
San Francisco Bay Area [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings		4
San Francisco Bay Area [Member] | 238/242 Lawrence [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	South San Francisco, CA
Encumbrances	689
Initial Cost of Land	6,674
Initial Cost of Buildings and Improvements	2,655
Costs Capitalized Subsequent to Acquisition	835
Gross carrying amount as of 12/31/14, Land	6,674
Gross carrying amount as of 12/31/14, Building & Improvements	3,490
Gross carrying amount as of 12/31/14, Total	10,164
Accumulated Depreciation	509
Year Acquired	2010
Year Constructed	1986
San Francisco Bay Area [Member] | 240 Littlefield Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	South San Francisco, CA
Initial Cost of Land	5,107
Initial Cost of Buildings and Improvements	3,293
Costs Capitalized Subsequent to Acquisition	2,847
Gross carrying amount as of 12/31/14, Land	5,107
Gross carrying amount as of 12/31/14, Building & Improvements	6,140
Gross carrying amount as of 12/31/14, Total	11,247
Accumulated Depreciation	92
Year Acquired	2013
Year Constructed	2013
San Francisco Bay Area [Member] | 299 Lawrence [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	South San Francisco, CA
Initial Cost of Land	1,352
Initial Cost of Buildings and Improvements	1,198
Costs Capitalized Subsequent to Acquisition	416
Gross carrying amount as of 12/31/14, Land	1,352
Gross carrying amount as of 12/31/14, Building & Improvements	1,614
Gross carrying amount as of 12/31/14, Total	2,966
Accumulated Depreciation	263
Year Acquired	2010
Year Constructed	1968
San Francisco Bay Area [Member] | 631 Brennan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	San Jose, CA
Initial Cost of Land	1,932
Initial Cost of Buildings and Improvements	2,245
Costs Capitalized Subsequent to Acquisition	447
Gross carrying amount as of 12/31/14, Land	1,932
Gross carrying amount as of 12/31/14, Building & Improvements	2,692
Gross carrying amount as of 12/31/14, Total	4,624
Accumulated Depreciation	180
Year Acquired	2012
Year Constructed	1975
San Francisco Bay Area [Member] | Ahern [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Union City, CA
Encumbrances	3,348
Initial Cost of Land	3,246
Initial Cost of Buildings and Improvements	2,749
Costs Capitalized Subsequent to Acquisition	402
Gross carrying amount as of 12/31/14, Land	3,246
Gross carrying amount as of 12/31/14, Building & Improvements	3,151
Gross carrying amount as of 12/31/14, Total	6,397
Accumulated Depreciation	438
Year Acquired	2010
Year Constructed	1986
San Francisco Bay Area [Member] | Burroughs [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	3
Location	San Leandro, CA
Initial Cost of Land	5,400
Initial Cost of Buildings and Improvements	7,092
Costs Capitalized Subsequent to Acquisition	100
Gross carrying amount as of 12/31/14, Land	5,400
Gross carrying amount as of 12/31/14, Building & Improvements	7,192
Gross carrying amount as of 12/31/14, Total	12,592
Accumulated Depreciation	128
Year Acquired	2014
Year Constructed	1966
San Francisco Bay Area [Member] | Caribbean [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	3
Location	Sunnyvale, CA
Initial Cost of Land	17,483
Initial Cost of Buildings and Improvements	14,493
Costs Capitalized Subsequent to Acquisition	1,635
Gross carrying amount as of 12/31/14, Land	17,483
Gross carrying amount as of 12/31/14, Building & Improvements	16,128
Gross carrying amount as of 12/31/14, Total	33,611
Accumulated Depreciation	1,027
Year Acquired	2012
San Francisco Bay Area [Member] | Carlton Court [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	South San Francisco, CA
Initial Cost of Land	2,036
Initial Cost of Buildings and Improvements	1,475
Costs Capitalized Subsequent to Acquisition	108
Gross carrying amount as of 12/31/14, Land	2,036
Gross carrying amount as of 12/31/14, Building & Improvements	1,583
Gross carrying amount as of 12/31/14, Total	3,619
Accumulated Depreciation	111
Year Acquired	2012
Year Constructed	1981
San Francisco Bay Area [Member] | Clawiter [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Hayward, CA
Encumbrances	4,669
Initial Cost of Land	5,964
Initial Cost of Buildings and Improvements	1,159
Costs Capitalized Subsequent to Acquisition	23
Gross carrying amount as of 12/31/14, Land	5,964
Gross carrying amount as of 12/31/14, Building & Improvements	1,182
Gross carrying amount as of 12/31/14, Total	7,146
Accumulated Depreciation	88
Year Acquired	2011
Year Constructed	1967
San Francisco Bay Area [Member] | Park Union City [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	3
Location	Union City, CA
Initial Cost of Land	8,468
Initial Cost of Buildings and Improvements	14,165
Gross carrying amount as of 12/31/14, Land	8,468
Gross carrying amount as of 12/31/14, Building & Improvements	14,165
Gross carrying amount as of 12/31/14, Total	22,633
Accumulated Depreciation	16
Year Acquired	2014
Year Constructed	1989
San Francisco Bay Area [Member] | Fortune/Qume [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	San Jose, CA
Initial Cost of Land	2,518
Initial Cost of Buildings and Improvements	2,484
Costs Capitalized Subsequent to Acquisition	707
Gross carrying amount as of 12/31/14, Land	2,518
Gross carrying amount as of 12/31/14, Building & Improvements	3,191
Gross carrying amount as of 12/31/14, Total	5,709
Accumulated Depreciation	575
Year Acquired	2010
Year Constructed	1980
San Francisco Bay Area [Member] | Warm Springs I And II [ Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Fremont, CA
Initial Cost of Land	3,664
Initial Cost of Buildings and Improvements	2,782
Costs Capitalized Subsequent to Acquisition	1,119
Gross carrying amount as of 12/31/14, Land	3,664
Gross carrying amount as of 12/31/14, Building & Improvements	3,901
Gross carrying amount as of 12/31/14, Total	7,565
Accumulated Depreciation	848
Year Acquired	2010
Year Constructed	1984
Seattle [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings		4
Seattle [Member] | 79th Ave South [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Kent, WA
Initial Cost of Land	1,267
Initial Cost of Buildings and Improvements	1,503
Costs Capitalized Subsequent to Acquisition	205
Gross carrying amount as of 12/31/14, Land	1,267
Gross carrying amount as of 12/31/14, Building & Improvements	1,708
Gross carrying amount as of 12/31/14, Total	2,975
Accumulated Depreciation	21
Year Acquired	2014
Year Constructed	2000
Seattle [Member] | 3401 Lind [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Renton, WA
Encumbrances	5,685
Initial Cost of Land	2,999
Initial Cost of Buildings and Improvements	6,707
Gross carrying amount as of 12/31/14, Land	2,999
Gross carrying amount as of 12/31/14, Building & Improvements	6,707
Gross carrying amount as of 12/31/14, Total	9,706
Accumulated Depreciation	36
Year Acquired	2014
Seattle [Member] | 17600 West Valley Highway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Tukwila, WA
Encumbrances	4,740
Initial Cost of Land	3,361
Initial Cost of Buildings and Improvements	5,260
Costs Capitalized Subsequent to Acquisition	303
Gross carrying amount as of 12/31/14, Land	3,361
Gross carrying amount as of 12/31/14, Building & Improvements	5,563
Gross carrying amount as of 12/31/14, Total	8,924
Accumulated Depreciation	391
Year Acquired	2012
Year Constructed	1986
Seattle [Member] | Auburn 1307 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Auburn, WA
Initial Cost of Land	4,253
Initial Cost of Buildings and Improvements	5,034
Gross carrying amount as of 12/31/14, Land	4,253
Gross carrying amount as of 12/31/14, Building & Improvements	5,034
Gross carrying amount as of 12/31/14, Total	9,287
Accumulated Depreciation	52
Year Acquired	2014
Year Constructed	2002
Seattle [Member] | Kent 188 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Kent, WA
Encumbrances	5,098
Initial Cost of Land	3,251
Initial Cost of Buildings and Improvements	4,719
Costs Capitalized Subsequent to Acquisition	1,179
Gross carrying amount as of 12/31/14, Land	3,251
Gross carrying amount as of 12/31/14, Building & Improvements	5,898
Gross carrying amount as of 12/31/14, Total	9,149
Accumulated Depreciation	715
Year Acquired	2010
Year Constructed	1979
Seattle [Member] | Kent 216th [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Kent, WA
Initial Cost of Land	3,672
Initial Cost of Buildings and Improvements	5,408
Costs Capitalized Subsequent to Acquisition	276
Gross carrying amount as of 12/31/14, Land	3,672
Gross carrying amount as of 12/31/14, Building & Improvements	5,684
Gross carrying amount as of 12/31/14, Total	9,356
Accumulated Depreciation	29
Year Acquired	2014
Year Constructed	1996
Seattle [Member] | SeaTac 8th Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Burien, WA
Initial Cost of Land	2,501
Initial Cost of Buildings and Improvements	4,020
Costs Capitalized Subsequent to Acquisition	332
Gross carrying amount as of 12/31/14, Land	2,501
Gross carrying amount as of 12/31/14, Building & Improvements	4,352
Gross carrying amount as of 12/31/14, Total	6,853
Accumulated Depreciation	231
Year Acquired	2013
Year Constructed	1988
Seattle [Member] | SW 34th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Renton, WA
Encumbrances	2,707
Initial Cost of Land	2,912
Initial Cost of Buildings and Improvements	3,289
Gross carrying amount as of 12/31/14, Land	2,912
Gross carrying amount as of 12/31/14, Building & Improvements	3,289
Gross carrying amount as of 12/31/14, Total	6,201
Accumulated Depreciation	81
Year Acquired	2014
Seattle [Member] | Valley Corporate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Kent, WA
Encumbrances	8,360
Initial Cost of Land	5,264
Initial Cost of Buildings and Improvements	9,096
Costs Capitalized Subsequent to Acquisition	341
Gross carrying amount as of 12/31/14, Land	5,264
Gross carrying amount as of 12/31/14, Building & Improvements	9,437
Gross carrying amount as of 12/31/14, Total	14,701
Accumulated Depreciation	792
Year Acquired	2011
Year Constructed	1987
Miami [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings		2
Miami [Member] | 10th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Hialeah, FL
Initial Cost of Land	6,376
Initial Cost of Buildings and Improvements	2,624
Costs Capitalized Subsequent to Acquisition	1,179
Gross carrying amount as of 12/31/14, Land	6,376
Gross carrying amount as of 12/31/14, Building & Improvements	3,803
Gross carrying amount as of 12/31/14, Total	10,179
Accumulated Depreciation	575
Year Acquired	2010
Miami [Member] | 26th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Miami, FL
Initial Cost of Land	4,569
Initial Cost of Buildings and Improvements	6,183
Costs Capitalized Subsequent to Acquisition	27
Gross carrying amount as of 12/31/14, Land	4,569
Gross carrying amount as of 12/31/14, Building & Improvements	6,210
Gross carrying amount as of 12/31/14, Total	10,779
Accumulated Depreciation	374
Year Acquired	2012
Year Constructed	1973
Miami [Member] | 39th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Doral, FL
Encumbrances	1,921
Initial Cost of Land	1,420
Initial Cost of Buildings and Improvements	2,717
Costs Capitalized Subsequent to Acquisition	8
Gross carrying amount as of 12/31/14, Land	1,420
Gross carrying amount as of 12/31/14, Building & Improvements	2,725
Gross carrying amount as of 12/31/14, Total	4,145
Accumulated Depreciation	231
Year Acquired	2011
Year Constructed	2002
Miami [Member] | 48th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Miami Gardens, FL
Initial Cost of Land	4,322
Initial Cost of Buildings and Improvements	2,187
Costs Capitalized Subsequent to Acquisition	47
Gross carrying amount as of 12/31/14, Land	4,322
Gross carrying amount as of 12/31/14, Building & Improvements	2,234
Gross carrying amount as of 12/31/14, Total	6,556
Accumulated Depreciation	177
Year Acquired	2011
Year Constructed	1987
Miami [Member] | 60th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Miami Lakes, FL
Initial Cost of Land	6,203
Initial Cost of Buildings and Improvements	1,567
Costs Capitalized Subsequent to Acquisition	6,345
Gross carrying amount as of 12/31/14, Land	6,203
Gross carrying amount as of 12/31/14, Building & Improvements	7,912
Gross carrying amount as of 12/31/14, Total	14,115
Accumulated Depreciation	1,129
Year Acquired	2010
Miami [Member] | 70th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Miami, FL
Initial Cost of Land	1,434
Initial Cost of Buildings and Improvements	2,333
Costs Capitalized Subsequent to Acquisition	136
Gross carrying amount as of 12/31/14, Land	1,434
Gross carrying amount as of 12/31/14, Building & Improvements	2,469
Gross carrying amount as of 12/31/14, Total	3,903
Accumulated Depreciation	224
Year Acquired	2011
Year Constructed	1999
Miami [Member] | 78th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Doral, FL
Initial Cost of Land	2,445
Initial Cost of Buildings and Improvements	1,755
Costs Capitalized Subsequent to Acquisition	1,885
Gross carrying amount as of 12/31/14, Land	2,445
Gross carrying amount as of 12/31/14, Building & Improvements	3,640
Gross carrying amount as of 12/31/14, Total	6,085
Accumulated Depreciation	285
Year Acquired	2012
Year Constructed	1977
Miami [Member] | 107th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Medley, FL
Initial Cost of Land	2,787
Initial Cost of Buildings and Improvements	2,036
Costs Capitalized Subsequent to Acquisition	30
Gross carrying amount as of 12/31/14, Land	2,787
Gross carrying amount as of 12/31/14, Building & Improvements	2,066
Gross carrying amount as of 12/31/14, Total	4,853
Accumulated Depreciation	109
Year Acquired	2013
Year Constructed	2001
Miami [Member] | 101st Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Medley, FL
Initial Cost of Land	2,647
Initial Cost of Buildings and Improvements	3,258
Costs Capitalized Subsequent to Acquisition	552
Gross carrying amount as of 12/31/14, Land	2,647
Gross carrying amount as of 12/31/14, Building & Improvements	3,810
Gross carrying amount as of 12/31/14, Total	6,457
Accumulated Depreciation	304
Year Acquired	2013
Year Constructed	2012
Miami [Member] | 131st Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Medley, FL
Initial Cost of Land	2,903
Initial Cost of Buildings and Improvements	5,729
Gross carrying amount as of 12/31/14, Land	2,903
Gross carrying amount as of 12/31/14, Building & Improvements	5,729
Gross carrying amount as of 12/31/14, Total	8,632
Accumulated Depreciation	19
Year Acquired	2014
Year Constructed	1999
Miami [Member] | Americas Gateway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	6
Location	Doral, FL
Initial Cost of Land	11,152
Initial Cost of Buildings and Improvements	11,721
Costs Capitalized Subsequent to Acquisition	663
Gross carrying amount as of 12/31/14, Land	11,152
Gross carrying amount as of 12/31/14, Building & Improvements	12,384
Gross carrying amount as of 12/31/14, Total	23,536
Accumulated Depreciation	603
Year Acquired	2013
Washington DC and Baltimore [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1	1
Washington DC and Baltimore [Member] | 75th Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	5
Location	Landover, MD
Initial Cost of Land	10,658
Initial Cost of Buildings and Improvements	18,615
Gross carrying amount as of 12/31/14, Land	10,658
Gross carrying amount as of 12/31/14, Building & Improvements	18,615
Gross carrying amount as of 12/31/14, Total	29,273
Accumulated Depreciation	21
Year Acquired	2014
Washington DC and Baltimore [Member] | 3601 Pennsy [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Landover, MD
Initial Cost of Land	2,331
Initial Cost of Buildings and Improvements	4,375
Costs Capitalized Subsequent to Acquisition	11
Gross carrying amount as of 12/31/14, Land	2,331
Gross carrying amount as of 12/31/14, Building & Improvements	4,386
Gross carrying amount as of 12/31/14, Total	6,717
Accumulated Depreciation	137
Year Acquired	2013
Year Constructed	1996
Washington DC and Baltimore [Member] | 4230 Forbes [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Lanham, MD
Initial Cost of Land	1,736
Initial Cost of Buildings and Improvements	2,395
Costs Capitalized Subsequent to Acquisition	111
Gross carrying amount as of 12/31/14, Land	1,736
Gross carrying amount as of 12/31/14, Building & Improvements	2,506
Gross carrying amount as of 12/31/14, Total	4,242
Accumulated Depreciation	90
Year Acquired	2013
Year Constructed	2003
Washington DC and Baltimore [Member] | 8215 Dorsey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Jessup, MD
Initial Cost of Land	2,263
Initial Cost of Buildings and Improvements	3,200
Gross carrying amount as of 12/31/14, Land	2,263
Gross carrying amount as of 12/31/14, Building & Improvements	3,200
Gross carrying amount as of 12/31/14, Total	5,463
Accumulated Depreciation	102
Year Acquired	2013
Washington DC and Baltimore [Member] | 8730 Bollman [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Savage, MD
Initial Cost of Land	4,361
Initial Cost of Buildings and Improvements	2,757
Costs Capitalized Subsequent to Acquisition	527
Gross carrying amount as of 12/31/14, Land	4,361
Gross carrying amount as of 12/31/14, Building & Improvements	3,284
Gross carrying amount as of 12/31/14, Total	7,645
Accumulated Depreciation	298
Year Acquired	2011
Year Constructed	1984
Washington DC and Baltimore [Member] | Dorsey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Jessup, MD
Initial Cost of Land	3,207
Initial Cost of Buildings and Improvements	2,383
Costs Capitalized Subsequent to Acquisition	1,258
Gross carrying amount as of 12/31/14, Land	3,207
Gross carrying amount as of 12/31/14, Building & Improvements	3,641
Gross carrying amount as of 12/31/14, Total	6,848
Accumulated Depreciation	440
Year Acquired	2011
Year Constructed	1977
Washington DC and Baltimore [Member] | Global Plaza [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Sterling, VA
Initial Cost of Land	1,948
Initial Cost of Buildings and Improvements	3,619
Costs Capitalized Subsequent to Acquisition	7
Gross carrying amount as of 12/31/14, Land	1,948
Gross carrying amount as of 12/31/14, Building & Improvements	3,626
Gross carrying amount as of 12/31/14, Total	5,574
Accumulated Depreciation	277
Year Acquired	2012
Year Constructed	2006
Washington DC and Baltimore [Member] | Hampton [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Capitol Heights, MD
Initial Cost of Land	5,095
Initial Cost of Buildings and Improvements	11,672
Gross carrying amount as of 12/31/14, Land	5,095
Gross carrying amount as of 12/31/14, Building & Improvements	11,672
Gross carrying amount as of 12/31/14, Total	16,767
Accumulated Depreciation	202
Year Acquired	2014
Year Constructed	2006
Washington DC and Baltimore [Member] | 9020 Junction [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Annapolis Junction, MD
Initial Cost of Land	2,526
Initial Cost of Buildings and Improvements	10,419
Gross carrying amount as of 12/31/14, Land	2,526
Gross carrying amount as of 12/31/14, Building & Improvements	10,419
Gross carrying amount as of 12/31/14, Total	12,945
Accumulated Depreciation	35
Year Acquired	2014
Washington DC and Baltimore [Member] | Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Hanover, MD
Initial Cost of Land	4,543
Initial Cost of Buildings and Improvements	12,094
Gross carrying amount as of 12/31/14, Land	4,543
Gross carrying amount as of 12/31/14, Building & Improvements	12,094
Gross carrying amount as of 12/31/14, Total	16,637
Accumulated Depreciation	266
Year Acquired	2014
Washington DC and Baltimore [Member] | Route 100 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	2
Location	Elkridge, MD
Initial Cost of Land	6,492
Initial Cost of Buildings and Improvements	9,403
Costs Capitalized Subsequent to Acquisition	1,135
Gross carrying amount as of 12/31/14, Land	6,492
Gross carrying amount as of 12/31/14, Building & Improvements	10,538
Gross carrying amount as of 12/31/14, Total	17,030
Accumulated Depreciation	473
Year Acquired	2013
Washington DC and Baltimore [Member] | Sweitzer [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Laurel, MD
Initial Cost of Land	2,541
Initial Cost of Buildings and Improvements	3,835
Costs Capitalized Subsequent to Acquisition	12
Gross carrying amount as of 12/31/14, Land	2,541
Gross carrying amount as of 12/31/14, Building & Improvements	3,847
Gross carrying amount as of 12/31/14, Total	6,388
Accumulated Depreciation	237
Year Acquired	2012
Year Constructed	1995
Washington DC and Baltimore [Member] | Troy Hill [Member]
Real Estate and Accumulated Depreciation [Line Items]
Number of buildings	1
Location	Elkridge, MD
Initial Cost of Land	1,409
Initial Cost of Buildings and Improvements	5,033
Costs Capitalized Subsequent to Acquisition	20
Gross carrying amount as of 12/31/14, Land	1,409
Gross carrying amount as of 12/31/14, Building & Improvements	5,053
Gross carrying amount as of 12/31/14, Total	6,462
Accumulated Depreciation	$ 320
Year Acquired	2012
Year Constructed	2003
Maximum [Member] | Los Angeles [Member] | Manhattan Beach [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1970
Maximum [Member] | Los Angeles [Member] | South Main II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2012
Maximum [Member] | Northern New Jersey/New York City [Member] | Interstate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2014
Maximum [Member] | Northern New Jersey/New York City [Member] | Ethel [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1984
Maximum [Member] | Northern New Jersey/New York City [Member] | JFK Airgate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1991
Maximum [Member] | Northern New Jersey/New York City [Member] | Melanie Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1998
Maximum [Member] | Northern New Jersey/New York City [Member] | Middlebrook [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1976
Maximum [Member] | Northern New Jersey/New York City [Member] | Terminal Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1968
Maximum [Member] | San Francisco Bay Area [Member] | Caribbean [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1981
Maximum [Member] | Seattle [Member] | 3401 Lind [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2012
Maximum [Member] | Seattle [Member] | SW 34th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2010
Maximum [Member] | Miami [Member] | 10th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2005
Maximum [Member] | Miami [Member] | 60th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2011
Maximum [Member] | Miami [Member] | Americas Gateway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1982
Maximum [Member] | Washington DC and Baltimore [Member] | 75th Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1990
Maximum [Member] | Washington DC and Baltimore [Member] | 8215 Dorsey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1981
Maximum [Member] | Washington DC and Baltimore [Member] | 9020 Junction [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2012
Maximum [Member] | Washington DC and Baltimore [Member] | Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	2012
Maximum [Member] | Washington DC and Baltimore [Member] | Route 100 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1974
Minimum [Member] | Los Angeles [Member] | Manhattan Beach [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1963
Minimum [Member] | Los Angeles [Member] | South Main II [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1963
Minimum [Member] | Northern New Jersey/New York City [Member] | Interstate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1999
Minimum [Member] | Northern New Jersey/New York City [Member] | Ethel [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1981
Minimum [Member] | Northern New Jersey/New York City [Member] | JFK Airgate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1986
Minimum [Member] | Northern New Jersey/New York City [Member] | Melanie Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1980
Minimum [Member] | Northern New Jersey/New York City [Member] | Middlebrook [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1958
Minimum [Member] | Northern New Jersey/New York City [Member] | Terminal Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1950
Minimum [Member] | San Francisco Bay Area [Member] | Caribbean [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1980
Minimum [Member] | Seattle [Member] | 3401 Lind [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1984
Minimum [Member] | Seattle [Member] | SW 34th Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1996
Minimum [Member] | Miami [Member] | 10th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1957
Minimum [Member] | Miami [Member] | 60th Avenue [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1971
Minimum [Member] | Miami [Member] | Americas Gateway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1978
Minimum [Member] | Washington DC and Baltimore [Member] | 75th Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1987
Minimum [Member] | Washington DC and Baltimore [Member] | 8215 Dorsey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1965
Minimum [Member] | Washington DC and Baltimore [Member] | 9020 Junction [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1989
Minimum [Member] | Washington DC and Baltimore [Member] | Parkway [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1968
Minimum [Member] | Washington DC and Baltimore [Member] | Route 100 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Year Constructed	1973