Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate And Accumulated Depreciation (Real Estate And Accumulated Depreciation) (Details)

v3.22.0.1
Schedule III - Real Estate And Accumulated Depreciation (Real Estate And Accumulated Depreciation) (Details)
ft² in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
ft²
property
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 27,712
Initial Cost to Company, Land $ 880,028
Initial Cost to Company, Buildings and Improvements 1,812,241
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 501,631
Gross Carrying Amount at December 31, 2021, Land 880,028
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,313,872
Gross Carrying Amount at December 31, 2021, Total 3,193,900
Accumulated Depreciation $ 1,234,682
Commercial Real Estate [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 27,010
Initial Cost to Company, Land $ 845,531
Initial Cost to Company, Buildings and Improvements 1,678,797
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 475,368
Gross Carrying Amount at December 31, 2021, Land 845,531
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,154,165
Gross Carrying Amount at December 31, 2021, Total 2,999,696
Accumulated Depreciation 1,167,824
Real Estate Facilities [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Initial Cost to Company, Land 867,345
Initial Cost to Company, Buildings and Improvements 1,763,720
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 475,417
Gross Carrying Amount at December 31, 2021, Land 867,345
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,239,137
Gross Carrying Amount at December 31, 2021, Total 3,106,482
Accumulated Depreciation $ 1,178,397
Buena Park Industrial Center [Member] | Commercial Real Estate [Member] | Buena Park, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 317
Initial Cost to Company, Land $ 3,245
Initial Cost to Company, Buildings and Improvements 7,703
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,663
Gross Carrying Amount at December 31, 2021, Land 3,245
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 11,366
Gross Carrying Amount at December 31, 2021, Total 14,611
Accumulated Depreciation $ 8,982
Year(s) Acquired 1997
Carson [Member] | Commercial Real Estate [Member] | Carson, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 77
Initial Cost to Company, Land $ 990
Initial Cost to Company, Buildings and Improvements 2,496
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,805
Gross Carrying Amount at December 31, 2021, Land 990
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 4,301
Gross Carrying Amount at December 31, 2021, Total 5,291
Accumulated Depreciation $ 3,591
Year(s) Acquired 1997
Cerritos Business Center [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 395
Initial Cost to Company, Land $ 4,218
Initial Cost to Company, Buildings and Improvements 10,273
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,952
Gross Carrying Amount at December 31, 2021, Land 4,218
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 15,225
Gross Carrying Amount at December 31, 2021, Total 19,443
Accumulated Depreciation $ 12,417
Year(s) Acquired 1997
Cerritos/Edwards [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 31
Initial Cost to Company, Land $ 450
Initial Cost to Company, Buildings and Improvements 1,217
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,728
Gross Carrying Amount at December 31, 2021, Land 450
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,945
Gross Carrying Amount at December 31, 2021, Total 3,395
Accumulated Depreciation $ 2,443
Year(s) Acquired 1997
Concord Business Park [Member] | Commercial Real Estate [Member] | Concord, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 246
Initial Cost to Company, Land $ 12,454
Initial Cost to Company, Buildings and Improvements 20,491
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,282
Gross Carrying Amount at December 31, 2021, Land 12,454
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 21,773
Gross Carrying Amount at December 31, 2021, Total 34,227
Accumulated Depreciation $ 8,788
Year(s) Acquired 2011
Culver City [Member] | Commercial Real Estate [Member] | Culver City, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 147
Initial Cost to Company, Land $ 3,252
Initial Cost to Company, Buildings and Improvements 8,157
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 6,608
Gross Carrying Amount at December 31, 2021, Land 3,252
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 14,765
Gross Carrying Amount at December 31, 2021, Total 18,017
Accumulated Depreciation $ 12,572
Year(s) Acquired 1997
Bayview Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 104
Initial Cost to Company, Land $ 4,990
Initial Cost to Company, Buildings and Improvements 4,831
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 412
Gross Carrying Amount at December 31, 2021, Land 4,990
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 5,243
Gross Carrying Amount at December 31, 2021, Total 10,233
Accumulated Depreciation $ 2,379
Year(s) Acquired 2011
Christy Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 334
Initial Cost to Company, Land $ 11,451
Initial Cost to Company, Buildings and Improvements 16,254
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,714
Gross Carrying Amount at December 31, 2021, Land 11,451
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 17,968
Gross Carrying Amount at December 31, 2021, Total 29,419
Accumulated Depreciation $ 7,927
Year(s) Acquired 2011
Industrial Drive Distribution Center [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 199
Initial Cost to Company, Land $ 7,482
Initial Cost to Company, Buildings and Improvements 6,812
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,257
Gross Carrying Amount at December 31, 2021, Land 7,482
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 8,069
Gross Carrying Amount at December 31, 2021, Total 15,551
Accumulated Depreciation $ 3,477
Year(s) Acquired 2011
Bay Center Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 463
Initial Cost to Company, Land $ 19,052
Initial Cost to Company, Buildings and Improvements 50,501
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,631
Gross Carrying Amount at December 31, 2021, Land 19,052
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 54,132
Gross Carrying Amount at December 31, 2021, Total 73,184
Accumulated Depreciation $ 21,477
Year(s) Acquired 2011
Cabot Distribution Center [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 249
Initial Cost to Company, Land $ 5,859
Initial Cost to Company, Buildings and Improvements 10,811
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 532
Gross Carrying Amount at December 31, 2021, Land 5,859
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 11,343
Gross Carrying Amount at December 31, 2021, Total 17,202
Accumulated Depreciation $ 4,144
Year(s) Acquired 2011
Diablo Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 271
Initial Cost to Company, Land $ 9,102
Initial Cost to Company, Buildings and Improvements 15,721
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,189
Gross Carrying Amount at December 31, 2021, Land 9,102
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 16,910
Gross Carrying Amount at December 31, 2021, Total 26,012
Accumulated Depreciation $ 6,778
Year(s) Acquired 2011
Eden Landing [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 83
Initial Cost to Company, Land $ 3,275
Initial Cost to Company, Buildings and Improvements 6,174
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 212
Gross Carrying Amount at December 31, 2021, Land 3,275
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 6,386
Gross Carrying Amount at December 31, 2021, Total 9,661
Accumulated Depreciation $ 2,558
Year(s) Acquired 2011
Hayward Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 1,091
Initial Cost to Company, Land $ 28,256
Initial Cost to Company, Buildings and Improvements 54,418
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 8,582
Gross Carrying Amount at December 31, 2021, Land 28,256
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 63,000
Gross Carrying Amount at December 31, 2021, Total 91,256
Accumulated Depreciation $ 23,024
Year(s) Acquired 2011
Huntwood Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 176
Initial Cost to Company, Land $ 7,391
Initial Cost to Company, Buildings and Improvements 11,819
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,383
Gross Carrying Amount at December 31, 2021, Land 7,391
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 13,202
Gross Carrying Amount at December 31, 2021, Total 20,593
Accumulated Depreciation $ 5,213
Year(s) Acquired 2011
Parkway Commerce [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 407
Initial Cost to Company, Land $ 4,398
Initial Cost to Company, Buildings and Improvements 10,433
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,724
Gross Carrying Amount at December 31, 2021, Land 4,398
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 15,157
Gross Carrying Amount at December 31, 2021, Total 19,555
Accumulated Depreciation $ 12,384
Year(s) Acquired 1997
La Mirada Commerce Center [Member] | Commercial Real Estate [Member] | La Mirada, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 73
Initial Cost to Company, Land $ 11,122
Initial Cost to Company, Buildings and Improvements 2,153
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 513
Gross Carrying Amount at December 31, 2021, Land 11,122
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,666
Gross Carrying Amount at December 31, 2021, Total 13,788
Accumulated Depreciation $ 364
Year(s) Acquired 2020
Laguna Hills Commerce Center [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 513
Initial Cost to Company, Land $ 16,262
Initial Cost to Company, Buildings and Improvements 39,559
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 9,422
Gross Carrying Amount at December 31, 2021, Land 16,262
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 48,981
Gross Carrying Amount at December 31, 2021, Total 65,243
Accumulated Depreciation $ 39,294
Year(s) Acquired 1997
Plaza Del Lago [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 101
Initial Cost to Company, Land $ 2,037
Initial Cost to Company, Buildings and Improvements 5,051
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,232
Gross Carrying Amount at December 31, 2021, Land 2,037
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 9,283
Gross Carrying Amount at December 31, 2021, Total 11,320
Accumulated Depreciation $ 7,755
Year(s) Acquired 1997
Canada Business Center [Member] | Commercial Real Estate [Member] | Lake Forest, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 297
Initial Cost to Company, Land $ 5,508
Initial Cost to Company, Buildings and Improvements 13,785
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 6,961
Gross Carrying Amount at December 31, 2021, Land 5,508
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 20,746
Gross Carrying Amount at December 31, 2021, Total 26,254
Accumulated Depreciation $ 16,826
Year(s) Acquired 1997
Dixon Landing Business Park [Member] | Commercial Real Estate [Member] | Milpitas, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 505
Initial Cost to Company, Land $ 26,301
Initial Cost to Company, Buildings and Improvements 21,121
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,438
Gross Carrying Amount at December 31, 2021, Land 26,301
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 25,559
Gross Carrying Amount at December 31, 2021, Total 51,860
Accumulated Depreciation $ 11,490
Year(s) Acquired 2011
Monterey/Calle [Member] | Commercial Real Estate [Member] | Monterey, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 12
Initial Cost to Company, Land $ 288
Initial Cost to Company, Buildings and Improvements 706
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 382
Gross Carrying Amount at December 31, 2021, Land 288
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 1,088
Gross Carrying Amount at December 31, 2021, Total 1,376
Accumulated Depreciation $ 927
Year(s) Acquired 1997
Monterey Park [Member] | Commercial Real Estate [Member] | Monterey Park, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 199
Initial Cost to Company, Land $ 3,078
Initial Cost to Company, Buildings and Improvements 7,862
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,878
Gross Carrying Amount at December 31, 2021, Land 3,078
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 9,740
Gross Carrying Amount at December 31, 2021, Total 12,818
Accumulated Depreciation $ 8,158
Year(s) Acquired 1997
Port Of Oakland [Member] | Commercial Real Estate [Member] | Oakland, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 200
Initial Cost to Company, Land $ 5,638
Initial Cost to Company, Buildings and Improvements 11,066
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 914
Gross Carrying Amount at December 31, 2021, Land 5,638
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 11,980
Gross Carrying Amount at December 31, 2021, Total 17,618
Accumulated Depreciation $ 4,901
Year(s) Acquired 2011
Kearney Mesa [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 164
Initial Cost to Company, Land $ 2,894
Initial Cost to Company, Buildings and Improvements 7,089
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,983
Gross Carrying Amount at December 31, 2021, Land 2,894
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 11,072
Gross Carrying Amount at December 31, 2021, Total 13,966
Accumulated Depreciation $ 8,642
Year(s) Acquired 1997
Rose Canyon Business Park [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 233
Initial Cost to Company, Land $ 15,129
Initial Cost to Company, Buildings and Improvements 20,054
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,058
Gross Carrying Amount at December 31, 2021, Land 15,129
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 23,112
Gross Carrying Amount at December 31, 2021, Total 38,241
Accumulated Depreciation $ 15,452
Year(s) Acquired 2005
Charcot Business Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 283
Initial Cost to Company, Land $ 18,654
Initial Cost to Company, Buildings and Improvements 17,580
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,113
Gross Carrying Amount at December 31, 2021, Land 18,654
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 19,693
Gross Carrying Amount at December 31, 2021, Total 38,347
Accumulated Depreciation $ 8,692
Year(s) Acquired 2011/2014
Las Plumas [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 214
Initial Cost to Company, Land $ 4,379
Initial Cost to Company, Buildings and Improvements 12,889
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 6,900
Gross Carrying Amount at December 31, 2021, Land 4,379
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 19,789
Gross Carrying Amount at December 31, 2021, Total 24,168
Accumulated Depreciation $ 17,082
Year(s) Acquired 1998
Little Orchard Distribution Center [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 213
Initial Cost to Company, Land $ 7,725
Initial Cost to Company, Buildings and Improvements 3,846
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,851
Gross Carrying Amount at December 31, 2021, Land 7,725
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 5,697
Gross Carrying Amount at December 31, 2021, Total 13,422
Accumulated Depreciation $ 2,135
Year(s) Acquired 2011
Montague Industrial Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 316
Initial Cost to Company, Land $ 14,476
Initial Cost to Company, Buildings and Improvements 12,807
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 782
Gross Carrying Amount at December 31, 2021, Land 14,476
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 13,589
Gross Carrying Amount at December 31, 2021, Total 28,065
Accumulated Depreciation $ 6,345
Year(s) Acquired 2011
Oakland Road [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 177
Initial Cost to Company, Land $ 3,458
Initial Cost to Company, Buildings and Improvements 8,765
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,415
Gross Carrying Amount at December 31, 2021, Land 3,458
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 12,180
Gross Carrying Amount at December 31, 2021, Total 15,638
Accumulated Depreciation $ 10,210
Year(s) Acquired 1997
Rogers Ave [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 67
Initial Cost to Company, Land $ 3,540
Initial Cost to Company, Buildings and Improvements 4,896
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 564
Gross Carrying Amount at December 31, 2021, Land 3,540
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 5,460
Gross Carrying Amount at December 31, 2021, Total 9,000
Accumulated Depreciation $ 3,379
Year(s) Acquired 2006
Doolittle Business Park [Member] | Commercial Real Estate [Member] | San Leandro, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 113
Initial Cost to Company, Land $ 3,929
Initial Cost to Company, Buildings and Improvements 6,231
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 355
Gross Carrying Amount at December 31, 2021, Land 3,929
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 6,586
Gross Carrying Amount at December 31, 2021, Total 10,515
Accumulated Depreciation $ 2,677
Year(s) Acquired 2011
Bayshore Corporate Center [Member] | Commercial Real Estate [Member] | San Mateo, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 340
Initial Cost to Company, Land $ 25,109
Initial Cost to Company, Buildings and Improvements 36,891
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 7,647
Gross Carrying Amount at December 31, 2021, Land 25,109
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 44,538
Gross Carrying Amount at December 31, 2021, Total 69,647
Accumulated Depreciation $ 18,644
Year(s) Acquired 2013
San Ramon/Norris Canyon [Member] | Commercial Real Estate [Member] | San Ramon, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 52
Initial Cost to Company, Land $ 1,486
Initial Cost to Company, Buildings and Improvements 3,642
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,385
Gross Carrying Amount at December 31, 2021, Land 1,486
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 5,027
Gross Carrying Amount at December 31, 2021, Total 6,513
Accumulated Depreciation $ 4,154
Year(s) Acquired 1997
Commerce Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 251
Initial Cost to Company, Land $ 17,218
Initial Cost to Company, Buildings and Improvements 21,914
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,012
Gross Carrying Amount at December 31, 2021, Land 17,218
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 25,926
Gross Carrying Amount at December 31, 2021, Total 43,144
Accumulated Depreciation $ 18,298
Year(s) Acquired 2007
Santa Clara Tech Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 178
Initial Cost to Company, Land $ 7,673
Initial Cost to Company, Buildings and Improvements 15,645
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,792
Gross Carrying Amount at December 31, 2021, Land 7,673
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 19,437
Gross Carrying Amount at December 31, 2021, Total 27,110
Accumulated Depreciation $ 15,356
Year(s) Acquired 2000
San Tomas Business Center [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 79
Initial Cost to Company, Land $ 12,932
Initial Cost to Company, Buildings and Improvements 3,549
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 931
Gross Carrying Amount at December 31, 2021, Land 12,932
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 4,480
Gross Carrying Amount at December 31, 2021, Total 17,412
Accumulated Depreciation $ 707
Year(s) Acquired 2019
Walsh At Lafayette [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 321
Initial Cost to Company, Land $ 13,439
Initial Cost to Company, Buildings and Improvements 17,890
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,223
Gross Carrying Amount at December 31, 2021, Land 13,439
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 19,113
Gross Carrying Amount at December 31, 2021, Total 32,552
Accumulated Depreciation $ 8,535
Year(s) Acquired 2011
Hathaway Industrial Park [Member] | Commercial Real Estate [Member] | Santa Fe Springs, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 543
Initial Cost to Company, Land $ 65,494
Initial Cost to Company, Buildings and Improvements 36,786
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,715
Gross Carrying Amount at December 31, 2021, Land 65,494
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 39,501
Gross Carrying Amount at December 31, 2021, Total 104,995
Accumulated Depreciation $ 3,557
Year(s) Acquired 2019
Signal Hill [Member] | Commercial Real Estate [Member] | Signal Hill, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 343
Initial Cost to Company, Land $ 16,360
Initial Cost to Company, Buildings and Improvements 16,678
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,851
Gross Carrying Amount at December 31, 2021, Land 16,360
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 20,529
Gross Carrying Amount at December 31, 2021, Total 36,889
Accumulated Depreciation $ 12,634
Year(s) Acquired 1997/2006/2019
Airport Boulevard [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 52
Initial Cost to Company, Land $ 899
Initial Cost to Company, Buildings and Improvements 2,387
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 809
Gross Carrying Amount at December 31, 2021, Land 899
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 3,196
Gross Carrying Amount at December 31, 2021, Total 4,095
Accumulated Depreciation $ 2,702
Year(s) Acquired 1997
South San Francisco/Produce [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 41
Initial Cost to Company, Land $ 776
Initial Cost to Company, Buildings and Improvements 1,886
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 514
Gross Carrying Amount at December 31, 2021, Land 776
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,400
Gross Carrying Amount at December 31, 2021, Total 3,176
Accumulated Depreciation $ 1,987
Year(s) Acquired 1997
Studio City/Ventura [Member] | Commercial Real Estate [Member] | Studio City, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 22
Initial Cost to Company, Land $ 621
Initial Cost to Company, Buildings and Improvements 1,530
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 552
Gross Carrying Amount at December 31, 2021, Land 621
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,082
Gross Carrying Amount at December 31, 2021, Total 2,703
Accumulated Depreciation $ 1,775
Year(s) Acquired 1997
Kifer Industrial Park [Member] | Commercial Real Estate [Member] | Sunnyvale, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 287
Initial Cost to Company, Land $ 13,227
Initial Cost to Company, Buildings and Improvements 37,874
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,946
Gross Carrying Amount at December 31, 2021, Land 13,227
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 39,820
Gross Carrying Amount at December 31, 2021, Total 53,047
Accumulated Depreciation $ 15,730
Year(s) Acquired 2011
Torrance [Member] | Commercial Real Estate [Member] | Torrance, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 147
Initial Cost to Company, Land $ 2,318
Initial Cost to Company, Buildings and Improvements 6,069
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,833
Gross Carrying Amount at December 31, 2021, Land 2,318
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 9,902
Gross Carrying Amount at December 31, 2021, Total 12,220
Accumulated Depreciation $ 8,206
Year(s) Acquired 1997
Boca Commerce [Member] | Commercial Real Estate [Member] | Boca Raton, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 135
Initial Cost to Company, Land $ 7,795
Initial Cost to Company, Buildings and Improvements 9,258
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,208
Gross Carrying Amount at December 31, 2021, Land 7,795
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 12,466
Gross Carrying Amount at December 31, 2021, Total 20,261
Accumulated Depreciation $ 8,093
Year(s) Acquired 2006
MICC [Member] | Commercial Real Estate [Member] | Miami, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 3,468
Initial Cost to Company, Land $ 95,115
Initial Cost to Company, Buildings and Improvements 112,583
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 44,849
Gross Carrying Amount at December 31, 2021, Land 95,115
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 157,432
Gross Carrying Amount at December 31, 2021, Total 252,547
Accumulated Depreciation $ 110,110
Year(s) Acquired 2003/2011/2014
Wellington [Member] | Commercial Real Estate [Member] | Wellington, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 263
Initial Cost to Company, Land $ 10,845
Initial Cost to Company, Buildings and Improvements 18,560
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,705
Gross Carrying Amount at December 31, 2021, Land 10,845
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 21,265
Gross Carrying Amount at December 31, 2021, Total 32,110
Accumulated Depreciation $ 12,067
Year(s) Acquired 2006
Ammendale [Member] | Commercial Real Estate [Member] | Beltsville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 255
Initial Cost to Company, Land $ 3,652
Initial Cost to Company, Buildings and Improvements 15,218
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 10,333
Gross Carrying Amount at December 31, 2021, Land 3,652
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 25,551
Gross Carrying Amount at December 31, 2021, Total 29,203
Accumulated Depreciation $ 22,126
Year(s) Acquired 1998
Gaithersburgh/Christopher [Member] | Commercial Real Estate [Member] | Gaithersburg, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 29
Initial Cost to Company, Land $ 475
Initial Cost to Company, Buildings and Improvements 1,203
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 905
Gross Carrying Amount at December 31, 2021, Land 475
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,108
Gross Carrying Amount at December 31, 2021, Total 2,583
Accumulated Depreciation $ 1,733
Year(s) Acquired 1997
Gude Drive (Land) [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Initial Cost to Company, Land $ 1,142
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 328
Gross Carrying Amount at December 31, 2021, Land 1,142
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 328
Gross Carrying Amount at December 31, 2021, Total 1,470
Accumulated Depreciation $ 243
Year(s) Acquired 2001
Parklawn Business Park [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 231
Initial Cost to Company, Land $ 3,387
Initial Cost to Company, Buildings and Improvements 19,628
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 6,193
Gross Carrying Amount at December 31, 2021, Land 3,387
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 25,821
Gross Carrying Amount at December 31, 2021, Total 29,208
Accumulated Depreciation $ 13,777
Year(s) Acquired 2010
The Grove 270 [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 577
Initial Cost to Company, Land $ 11,009
Initial Cost to Company, Buildings and Improvements 58,364
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 23,703
Gross Carrying Amount at December 31, 2021, Land 11,009
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 82,067
Gross Carrying Amount at December 31, 2021, Total 93,076
Accumulated Depreciation $ 41,184
Year(s) Acquired 2010/2016
Ben White [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 108
Initial Cost to Company, Land $ 1,550
Initial Cost to Company, Buildings and Improvements 7,015
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,385
Gross Carrying Amount at December 31, 2021, Land 1,550
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 10,400
Gross Carrying Amount at December 31, 2021, Total 11,950
Accumulated Depreciation $ 7,398
Year(s) Acquired 1998
Lamar Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 198
Initial Cost to Company, Land $ 2,528
Initial Cost to Company, Buildings and Improvements 6,596
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 8,477
Gross Carrying Amount at December 31, 2021, Land 2,528
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 15,073
Gross Carrying Amount at December 31, 2021, Total 17,601
Accumulated Depreciation $ 12,321
Year(s) Acquired 1997
McKalla [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 236
Initial Cost to Company, Land $ 1,945
Initial Cost to Company, Buildings and Improvements 13,212
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,568
Gross Carrying Amount at December 31, 2021, Land 1,945
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 15,780
Gross Carrying Amount at December 31, 2021, Total 17,725
Accumulated Depreciation $ 10,130
Year(s) Acquired 1998/2012
McNeil [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 525
Initial Cost to Company, Land $ 5,477
Initial Cost to Company, Buildings and Improvements 24,495
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 5,992
Gross Carrying Amount at December 31, 2021, Land 5,477
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 30,487
Gross Carrying Amount at December 31, 2021, Total 35,964
Accumulated Depreciation $ 16,293
Year(s) Acquired 1999/2010/2012/2014
Rutland [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 235
Initial Cost to Company, Land $ 2,022
Initial Cost to Company, Buildings and Improvements 9,397
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,007
Gross Carrying Amount at December 31, 2021, Land 2,022
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 12,404
Gross Carrying Amount at December 31, 2021, Total 14,426
Accumulated Depreciation $ 9,583
Year(s) Acquired 1998/1999
Waterford [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 106
Initial Cost to Company, Land $ 2,108
Initial Cost to Company, Buildings and Improvements 9,649
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,007
Gross Carrying Amount at December 31, 2021, Land 2,108
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 13,656
Gross Carrying Amount at December 31, 2021, Total 15,764
Accumulated Depreciation $ 11,391
Year(s) Acquired 1999
Braker Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 257
Initial Cost to Company, Land $ 1,874
Initial Cost to Company, Buildings and Improvements 13,990
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,140
Gross Carrying Amount at December 31, 2021, Land 1,874
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 17,130
Gross Carrying Amount at December 31, 2021, Total 19,004
Accumulated Depreciation $ 9,417
Year(s) Acquired 2010
Mopac Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 117
Initial Cost to Company, Land $ 719
Initial Cost to Company, Buildings and Improvements 3,579
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 739
Gross Carrying Amount at December 31, 2021, Land 719
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 4,318
Gross Carrying Amount at December 31, 2021, Total 5,037
Accumulated Depreciation $ 2,347
Year(s) Acquired 2010
Southpark Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 181
Initial Cost to Company, Land $ 1,266
Initial Cost to Company, Buildings and Improvements 9,882
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,701
Gross Carrying Amount at December 31, 2021, Land 1,266
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 12,583
Gross Carrying Amount at December 31, 2021, Total 13,849
Accumulated Depreciation $ 6,771
Year(s) Acquired 2010
Valwood Business Center [Member] | Commercial Real Estate [Member] | Carrolton, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 356
Initial Cost to Company, Land $ 2,510
Initial Cost to Company, Buildings and Improvements 13,859
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,002
Gross Carrying Amount at December 31, 2021, Land 2,510
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 17,861
Gross Carrying Amount at December 31, 2021, Total 20,371
Accumulated Depreciation $ 7,506
Year(s) Acquired 2013
Northway Plaza [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 131
Initial Cost to Company, Land $ 1,742
Initial Cost to Company, Buildings and Improvements 4,503
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,629
Gross Carrying Amount at December 31, 2021, Land 1,742
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 7,132
Gross Carrying Amount at December 31, 2021, Total 8,874
Accumulated Depreciation $ 2,763
Year(s) Acquired 2013
Springlake Business Center [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 206
Initial Cost to Company, Land $ 2,607
Initial Cost to Company, Buildings and Improvements 5,715
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,698
Gross Carrying Amount at December 31, 2021, Land 2,607
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 7,413
Gross Carrying Amount at December 31, 2021, Total 10,020
Accumulated Depreciation $ 3,516
Year(s) Acquired 2013/2014
Westwood Business Park [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 112
Initial Cost to Company, Land $ 941
Initial Cost to Company, Buildings and Improvements 6,884
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,501
Gross Carrying Amount at December 31, 2021, Land 941
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 9,385
Gross Carrying Amount at December 31, 2021, Total 10,326
Accumulated Depreciation $ 6,825
Year(s) Acquired 2003
Eastgate [Member] | Commercial Real Estate [Member] | Garland, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 36
Initial Cost to Company, Land $ 480
Initial Cost to Company, Buildings and Improvements 1,203
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 552
Gross Carrying Amount at December 31, 2021, Land 480
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 1,755
Gross Carrying Amount at December 31, 2021, Total 2,235
Accumulated Depreciation $ 1,443
Year(s) Acquired 1997
Port America [Member] | Commercial Real Estate [Member] | Grapevine, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 718
Initial Cost to Company, Land $ 20,308
Initial Cost to Company, Buildings and Improvements 100,896
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 143
Gross Carrying Amount at December 31, 2021, Land 20,308
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 101,039
Gross Carrying Amount at December 31, 2021, Total 121,347
Accumulated Depreciation $ 1,511
Year(s) Acquired 2021
Freeport Business Park [Member] | Commercial Real Estate [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 339
Initial Cost to Company, Land $ 5,552
Initial Cost to Company, Buildings and Improvements 17,568
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,428
Gross Carrying Amount at December 31, 2021, Land 5,552
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 20,996
Gross Carrying Amount at December 31, 2021, Total 26,548
Accumulated Depreciation $ 6,664
Year(s) Acquired 2013/2021
NFTZ [Member] | Commercial Real Estate [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 231
Initial Cost to Company, Land $ 1,517
Initial Cost to Company, Buildings and Improvements 6,499
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,024
Gross Carrying Amount at December 31, 2021, Land 1,517
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 10,523
Gross Carrying Amount at December 31, 2021, Total 12,040
Accumulated Depreciation $ 8,919
Year(s) Acquired 1998
Number of properties subject to ground leases | property 2
La Prada [Member] | Commercial Real Estate [Member] | Mesquite, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 56
Initial Cost to Company, Land $ 495
Initial Cost to Company, Buildings and Improvements 1,235
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 823
Gross Carrying Amount at December 31, 2021, Land 495
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 2,058
Gross Carrying Amount at December 31, 2021, Total 2,553
Accumulated Depreciation $ 1,728
Year(s) Acquired 1997
The Summit [Member] | Commercial Real Estate [Member] | Plano, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 184
Initial Cost to Company, Land $ 1,536
Initial Cost to Company, Buildings and Improvements 6,654
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,420
Gross Carrying Amount at December 31, 2021, Land 1,536
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 11,074
Gross Carrying Amount at December 31, 2021, Total 12,610
Accumulated Depreciation $ 9,252
Year(s) Acquired 1998
Jupiter Business Park [Member] | Commercial Real Estate [Member] | Plano, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 141
Initial Cost to Company, Land $ 2,283
Initial Cost to Company, Buildings and Improvements 22,817
Gross Carrying Amount at December 31, 2021, Land 2,283
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 22,817
Gross Carrying Amount at December 31, 2021, Total 25,100
Accumulated Depreciation $ 86
Year(s) Acquired 2021
Arapaho Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 408
Initial Cost to Company, Land $ 5,226
Initial Cost to Company, Buildings and Improvements 10,661
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,989
Gross Carrying Amount at December 31, 2021, Land 5,226
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 15,650
Gross Carrying Amount at December 31, 2021, Total 20,876
Accumulated Depreciation $ 8,068
Year(s) Acquired 2013/2014
Richardson Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 117
Initial Cost to Company, Land $ 799
Initial Cost to Company, Buildings and Improvements 3,568
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,232
Gross Carrying Amount at December 31, 2021, Land 799
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 6,800
Gross Carrying Amount at December 31, 2021, Total 7,599
Accumulated Depreciation $ 5,872
Year(s) Acquired 1998
Bren Mar [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 113
Initial Cost to Company, Land $ 2,197
Initial Cost to Company, Buildings and Improvements 5,380
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 4,523
Gross Carrying Amount at December 31, 2021, Land 2,197
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 9,903
Gross Carrying Amount at December 31, 2021, Total 12,100
Accumulated Depreciation $ 8,151
Year(s) Acquired 1997
Eisenhower [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 95
Initial Cost to Company, Land $ 1,440
Initial Cost to Company, Buildings and Improvements 3,635
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,947
Gross Carrying Amount at December 31, 2021, Land 1,440
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 6,582
Gross Carrying Amount at December 31, 2021, Total 8,022
Accumulated Depreciation $ 5,567
Year(s) Acquired 1997
Pickett Industrial Park [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 246
Initial Cost to Company, Land $ 19,138
Initial Cost to Company, Buildings and Improvements 25,016
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,429
Gross Carrying Amount at December 31, 2021, Land 19,138
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 26,445
Gross Carrying Amount at December 31, 2021, Total 45,583
Accumulated Depreciation $ 1,336
Year(s) Acquired 2020
Beaumont [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 107
Initial Cost to Company, Land $ 4,736
Initial Cost to Company, Buildings and Improvements 11,051
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,294
Gross Carrying Amount at December 31, 2021, Land 4,736
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 13,345
Gross Carrying Amount at December 31, 2021, Total 18,081
Accumulated Depreciation $ 9,110
Year(s) Acquired 2006
Dulles South [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 99
Initial Cost to Company, Land $ 1,373
Initial Cost to Company, Buildings and Improvements 6,810
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 3,172
Gross Carrying Amount at December 31, 2021, Land 1,373
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 9,982
Gross Carrying Amount at December 31, 2021, Total 11,355
Accumulated Depreciation $ 7,932
Year(s) Acquired 1999
Lafayette [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 197
Initial Cost to Company, Land $ 1,680
Initial Cost to Company, Buildings and Improvements 13,398
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 6,794
Gross Carrying Amount at December 31, 2021, Land 1,680
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 20,192
Gross Carrying Amount at December 31, 2021, Total 21,872
Accumulated Depreciation $ 15,849
Year(s) Acquired 1999/2000
Fair Oaks Business Park [Member] | Commercial Real Estate [Member] | Fairfax, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 290
Initial Cost to Company, Land $ 13,598
Initial Cost to Company, Buildings and Improvements 36,232
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 10,498
Gross Carrying Amount at December 31, 2021, Land 13,598
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 46,730
Gross Carrying Amount at December 31, 2021, Total 60,328
Accumulated Depreciation $ 31,981
Year(s) Acquired 2004/2007
Gunston [Member] | Commercial Real Estate [Member] | Lorton, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 247
Initial Cost to Company, Land $ 4,146
Initial Cost to Company, Buildings and Improvements 17,872
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 13,136
Gross Carrying Amount at December 31, 2021, Land 4,146
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 31,008
Gross Carrying Amount at December 31, 2021, Total 35,154
Accumulated Depreciation $ 24,173
Year(s) Acquired 1998
The Mile [Member] | Commercial Real Estate [Member] | McLean, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 628
Initial Cost to Company, Land $ 38,279
Initial Cost to Company, Buildings and Improvements 83,596
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 27,497
Gross Carrying Amount at December 31, 2021, Land 38,279
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 111,093
Gross Carrying Amount at December 31, 2021, Total 149,372
Accumulated Depreciation $ 58,282
Year(s) Acquired 2010/2011
Prosperity at Merrifield [Member] | Commercial Real Estate [Member] | Merrifield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 659
Initial Cost to Company, Land $ 23,147
Initial Cost to Company, Buildings and Improvements 67,575
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 40,476
Gross Carrying Amount at December 31, 2021, Land 23,147
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 108,051
Gross Carrying Amount at December 31, 2021, Total 131,198
Accumulated Depreciation $ 79,924
Year(s) Acquired 2001
Alban Road [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 150
Initial Cost to Company, Land $ 1,935
Initial Cost to Company, Buildings and Improvements 4,736
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 5,261
Gross Carrying Amount at December 31, 2021, Land 1,935
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 9,997
Gross Carrying Amount at December 31, 2021, Total 11,932
Accumulated Depreciation $ 8,385
Year(s) Acquired 1997
I-95 [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 210
Initial Cost to Company, Land $ 3,535
Initial Cost to Company, Buildings and Improvements 15,672
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 15,128
Gross Carrying Amount at December 31, 2021, Land 3,535
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 30,800
Gross Carrying Amount at December 31, 2021, Total 34,335
Accumulated Depreciation $ 25,926
Year(s) Acquired 2000
Fullterton Road Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 243
Initial Cost to Company, Land $ 7,438
Initial Cost to Company, Buildings and Improvements 24,971
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 1,241
Gross Carrying Amount at December 31, 2021, Land 7,438
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 26,212
Gross Carrying Amount at December 31, 2021, Total 33,650
Accumulated Depreciation $ 3,990
Year(s) Acquired 2018
Northern Virginia Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 814
Initial Cost to Company, Land $ 18,369
Initial Cost to Company, Buildings and Improvements 87,258
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 7,575
Gross Carrying Amount at December 31, 2021, Land 18,369
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 94,833
Gross Carrying Amount at December 31, 2021, Total 113,202
Accumulated Depreciation $ 14,750
Year(s) Acquired 2018
Northpointe [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 147
Initial Cost to Company, Land $ 2,767
Initial Cost to Company, Buildings and Improvements 8,778
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 5,182
Gross Carrying Amount at December 31, 2021, Land 2,767
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 13,960
Gross Carrying Amount at December 31, 2021, Total 16,727
Accumulated Depreciation $ 11,920
Year(s) Acquired 1997/1998
Shaw Road [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 149
Initial Cost to Company, Land $ 2,969
Initial Cost to Company, Buildings and Improvements 10,008
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 5,094
Gross Carrying Amount at December 31, 2021, Land 2,969
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 15,102
Gross Carrying Amount at December 31, 2021, Total 18,071
Accumulated Depreciation $ 12,864
Year(s) Acquired 1998
Tysons Corporate Center [Member] | Commercial Real Estate [Member] | Vienna, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 270
Initial Cost to Company, Land $ 9,885
Initial Cost to Company, Buildings and Improvements 25,302
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 11,028
Gross Carrying Amount at December 31, 2021, Land 9,885
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 36,330
Gross Carrying Amount at December 31, 2021, Total 46,215
Accumulated Depreciation $ 19,502
Year(s) Acquired 2010
Woodbridge [Member] | Commercial Real Estate [Member] | Woodbridge, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 114
Initial Cost to Company, Land $ 1,350
Initial Cost to Company, Buildings and Improvements 3,398
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 2,484
Gross Carrying Amount at December 31, 2021, Land 1,350
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 5,882
Gross Carrying Amount at December 31, 2021, Total 7,232
Accumulated Depreciation $ 4,947
Year(s) Acquired 1997
212th Business Park [Member] | Commercial Real Estate [Member] | Kent, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 951
Initial Cost to Company, Land $ 19,573
Initial Cost to Company, Buildings and Improvements 17,695
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 13,478
Gross Carrying Amount at December 31, 2021, Land 19,573
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 31,173
Gross Carrying Amount at December 31, 2021, Total 50,746
Accumulated Depreciation $ 15,437
Year(s) Acquired 2012
Overlake [Member] | Commercial Real Estate [Member] | Redmond, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 371
Initial Cost to Company, Land $ 20,906
Initial Cost to Company, Buildings and Improvements 38,522
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 8,045
Gross Carrying Amount at December 31, 2021, Land 20,906
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 46,567
Gross Carrying Amount at December 31, 2021, Total 67,473
Accumulated Depreciation $ 32,500
Year(s) Acquired 2007
Renton [Member] | Commercial Real Estate [Member] | Renton, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 28
Initial Cost to Company, Land $ 330
Initial Cost to Company, Buildings and Improvements 889
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 760
Gross Carrying Amount at December 31, 2021, Land 330
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 1,649
Gross Carrying Amount at December 31, 2021, Total 1,979
Accumulated Depreciation $ 1,393
Year(s) Acquired 1997
Highgate at the Mile [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Number of units of Real Estate Property | property 395
Highgate at the Mile [Member] | Multifamily [Member] | McLean, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Number of units of Real Estate Property | property 395
Initial Cost to Company, Land $ 21,814
Initial Cost to Company, Buildings and Improvements 84,923
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 49
Gross Carrying Amount at December 31, 2021, Land 21,814
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 84,972
Gross Carrying Amount at December 31, 2021, Total 106,786
Accumulated Depreciation $ 10,573
Year(s) Acquired 2018
Royal Tech [Member] | Properties Held for Sale [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Square Feet | ft² 702
Initial Cost to Company, Land $ 12,683
Initial Cost to Company, Buildings and Improvements 48,521
Cost Capitalized Subsequent to Acquisition, Buildings and Improvements 26,214
Gross Carrying Amount at December 31, 2021, Land 12,683
Gross Carrying Amount at December 31, 2021, Buildings and Improvements 74,735
Gross Carrying Amount at December 31, 2021, Total 87,418
Accumulated Depreciation $ 56,285
Year(s) Acquired 1998-2000/2011
Minimum [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Ground leases expiration date 2029
Minimum [Member] | Buena Park Industrial Center [Member] | Commercial Real Estate [Member] | Buena Park, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Carson [Member] | Commercial Real Estate [Member] | Carson, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Cerritos Business Center [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Cerritos/Edwards [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Concord Business Park [Member] | Commercial Real Estate [Member] | Concord, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Culver City [Member] | Commercial Real Estate [Member] | Culver City, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Bayview Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Christy Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Industrial Drive Distribution Center [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Bay Center Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Cabot Distribution Center [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Diablo Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Eden Landing [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Hayward Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Huntwood Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Parkway Commerce [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | La Mirada Commerce Center [Member] | Commercial Real Estate [Member] | La Mirada, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Laguna Hills Commerce Center [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Plaza Del Lago [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Canada Business Center [Member] | Commercial Real Estate [Member] | Lake Forest, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Dixon Landing Business Park [Member] | Commercial Real Estate [Member] | Milpitas, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Monterey/Calle [Member] | Commercial Real Estate [Member] | Monterey, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Monterey Park [Member] | Commercial Real Estate [Member] | Monterey Park, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Port Of Oakland [Member] | Commercial Real Estate [Member] | Oakland, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Kearney Mesa [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Rose Canyon Business Park [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Charcot Business Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Las Plumas [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Little Orchard Distribution Center [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Montague Industrial Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Oakland Road [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Rogers Ave [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Doolittle Business Park [Member] | Commercial Real Estate [Member] | San Leandro, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Bayshore Corporate Center [Member] | Commercial Real Estate [Member] | San Mateo, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | San Ramon/Norris Canyon [Member] | Commercial Real Estate [Member] | San Ramon, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Commerce Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Santa Clara Tech Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | San Tomas Business Center [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Walsh At Lafayette [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Hathaway Industrial Park [Member] | Commercial Real Estate [Member] | Santa Fe Springs, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Signal Hill [Member] | Commercial Real Estate [Member] | Signal Hill, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Airport Boulevard [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | South San Francisco/Produce [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Studio City/Ventura [Member] | Commercial Real Estate [Member] | Studio City, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Kifer Industrial Park [Member] | Commercial Real Estate [Member] | Sunnyvale, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Torrance [Member] | Commercial Real Estate [Member] | Torrance, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Boca Commerce [Member] | Commercial Real Estate [Member] | Boca Raton, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | MICC [Member] | Commercial Real Estate [Member] | Miami, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Wellington [Member] | Commercial Real Estate [Member] | Wellington, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Ammendale [Member] | Commercial Real Estate [Member] | Beltsville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Gaithersburgh/Christopher [Member] | Commercial Real Estate [Member] | Gaithersburg, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Gude Drive (Land) [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Parklawn Business Park [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | The Grove 270 [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Ben White [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Lamar Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | McKalla [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | McNeil [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Rutland [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Waterford [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Braker Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Mopac Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Southpark Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Valwood Business Center [Member] | Commercial Real Estate [Member] | Carrolton, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Northway Plaza [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Springlake Business Center [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Westwood Business Park [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Eastgate [Member] | Commercial Real Estate [Member] | Garland, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Port America [Member] | Commercial Real Estate [Member] | Grapevine, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Freeport Business Park [Member] | Commercial Real Estate [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | NFTZ [Member] | Commercial Real Estate [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Ground leases expiration date 2029
Minimum [Member] | La Prada [Member] | Commercial Real Estate [Member] | Mesquite, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | The Summit [Member] | Commercial Real Estate [Member] | Plano, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Jupiter Business Park [Member] | Commercial Real Estate [Member] | Plano, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Arapaho Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Richardson Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Bren Mar [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Eisenhower [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Pickett Industrial Park [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Beaumont [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Dulles South [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Lafayette [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Fair Oaks Business Park [Member] | Commercial Real Estate [Member] | Fairfax, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Gunston [Member] | Commercial Real Estate [Member] | Lorton, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | The Mile [Member] | Commercial Real Estate [Member] | McLean, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Prosperity at Merrifield [Member] | Commercial Real Estate [Member] | Merrifield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Alban Road [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | I-95 [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Fullterton Road Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Northern Virginia Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Northpointe [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Shaw Road [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Tysons Corporate Center [Member] | Commercial Real Estate [Member] | Vienna, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Woodbridge [Member] | Commercial Real Estate [Member] | Woodbridge, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | 212th Business Park [Member] | Commercial Real Estate [Member] | Kent, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Overlake [Member] | Commercial Real Estate [Member] | Redmond, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Renton [Member] | Commercial Real Estate [Member] | Renton, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Highgate at the Mile [Member] | Multifamily [Member] | McLean, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Minimum [Member] | Royal Tech [Member] | Properties Held for Sale [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 5 years
Maximum [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Ground leases expiration date 2030
Maximum [Member] | Buena Park Industrial Center [Member] | Commercial Real Estate [Member] | Buena Park, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Carson [Member] | Commercial Real Estate [Member] | Carson, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Cerritos Business Center [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Cerritos/Edwards [Member] | Commercial Real Estate [Member] | Cerritos, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Concord Business Park [Member] | Commercial Real Estate [Member] | Concord, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Culver City [Member] | Commercial Real Estate [Member] | Culver City, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Bayview Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Christy Business Park [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Industrial Drive Distribution Center [Member] | Commercial Real Estate [Member] | Fremont, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Bay Center Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Cabot Distribution Center [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Diablo Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Eden Landing [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Hayward Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Huntwood Business Park [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Parkway Commerce [Member] | Commercial Real Estate [Member] | Hayward, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | La Mirada Commerce Center [Member] | Commercial Real Estate [Member] | La Mirada, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Laguna Hills Commerce Center [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Plaza Del Lago [Member] | Commercial Real Estate [Member] | Laguna Hills, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Canada Business Center [Member] | Commercial Real Estate [Member] | Lake Forest, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Dixon Landing Business Park [Member] | Commercial Real Estate [Member] | Milpitas, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Monterey/Calle [Member] | Commercial Real Estate [Member] | Monterey, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Monterey Park [Member] | Commercial Real Estate [Member] | Monterey Park, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Port Of Oakland [Member] | Commercial Real Estate [Member] | Oakland, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Kearney Mesa [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Rose Canyon Business Park [Member] | Commercial Real Estate [Member] | San Diego, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Charcot Business Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Las Plumas [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Little Orchard Distribution Center [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Montague Industrial Park [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Oakland Road [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Rogers Ave [Member] | Commercial Real Estate [Member] | San Jose, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Doolittle Business Park [Member] | Commercial Real Estate [Member] | San Leandro, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Bayshore Corporate Center [Member] | Commercial Real Estate [Member] | San Mateo, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | San Ramon/Norris Canyon [Member] | Commercial Real Estate [Member] | San Ramon, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Commerce Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Santa Clara Tech Park [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | San Tomas Business Center [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Walsh At Lafayette [Member] | Commercial Real Estate [Member] | Santa Clara, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Hathaway Industrial Park [Member] | Commercial Real Estate [Member] | Santa Fe Springs, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Signal Hill [Member] | Commercial Real Estate [Member] | Signal Hill, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Airport Boulevard [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | South San Francisco/Produce [Member] | Commercial Real Estate [Member] | So San Francisco, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Studio City/Ventura [Member] | Commercial Real Estate [Member] | Studio City, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Kifer Industrial Park [Member] | Commercial Real Estate [Member] | Sunnyvale, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Torrance [Member] | Commercial Real Estate [Member] | Torrance, CA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Boca Commerce [Member] | Commercial Real Estate [Member] | Boca Raton, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | MICC [Member] | Commercial Real Estate [Member] | Miami, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Wellington [Member] | Commercial Real Estate [Member] | Wellington, FL [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Ammendale [Member] | Commercial Real Estate [Member] | Beltsville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Gaithersburgh/Christopher [Member] | Commercial Real Estate [Member] | Gaithersburg, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Gude Drive (Land) [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Parklawn Business Park [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | The Grove 270 [Member] | Commercial Real Estate [Member] | Rockville, MD [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Ben White [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Lamar Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | McKalla [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | McNeil [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Rutland [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Waterford [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Braker Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Mopac Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Southpark Business Park [Member] | Commercial Real Estate [Member] | Austin, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Valwood Business Center [Member] | Commercial Real Estate [Member] | Carrolton, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Northway Plaza [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Springlake Business Center [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Westwood Business Park [Member] | Commercial Real Estate [Member] | Farmers Branch, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Eastgate [Member] | Commercial Real Estate [Member] | Garland, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Port America [Member] | Commercial Real Estate [Member] | Grapevine, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Freeport Business Park [Member] | Commercial Real Estate [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | NFTZ [Member] | Commercial Real Estate [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Ground leases expiration date 2030
Maximum [Member] | La Prada [Member] | Commercial Real Estate [Member] | Mesquite, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | The Summit [Member] | Commercial Real Estate [Member] | Plano, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Jupiter Business Park [Member] | Commercial Real Estate [Member] | Plano, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Arapaho Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Richardson Business Park [Member] | Commercial Real Estate [Member] | Richardson, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Bren Mar [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Eisenhower [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Pickett Industrial Park [Member] | Commercial Real Estate [Member] | Alexandria, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Beaumont [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Dulles South [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Lafayette [Member] | Commercial Real Estate [Member] | Chantilly, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Fair Oaks Business Park [Member] | Commercial Real Estate [Member] | Fairfax, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Gunston [Member] | Commercial Real Estate [Member] | Lorton, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | The Mile [Member] | Commercial Real Estate [Member] | McLean, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Prosperity at Merrifield [Member] | Commercial Real Estate [Member] | Merrifield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Alban Road [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | I-95 [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Fullterton Road Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Northern Virginia Industrial Park [Member] | Commercial Real Estate [Member] | Springfield, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Northpointe [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Shaw Road [Member] | Commercial Real Estate [Member] | Sterling, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Tysons Corporate Center [Member] | Commercial Real Estate [Member] | Vienna, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Woodbridge [Member] | Commercial Real Estate [Member] | Woodbridge, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | 212th Business Park [Member] | Commercial Real Estate [Member] | Kent, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Overlake [Member] | Commercial Real Estate [Member] | Redmond, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Renton [Member] | Commercial Real Estate [Member] | Renton, WA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years
Maximum [Member] | Highgate at the Mile [Member] | Multifamily [Member] | McLean, VA [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 40 years
Maximum [Member] | Royal Tech [Member] | Properties Held for Sale [Member] | Irving, TX [Member]  
Real Estate and Accumulated Depreciation [Line Items]  
Depreciable Lives (Years) 30 years