Schedule III - Real Estate and Accumulated Depreciation - Schedule of Real Estate and Accumulated Depreciation (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) ft²	Dec. 21, 2018 ft²	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 335,811
Initial cost, land and improvements	2,058,007
Initial cost, buildings and Improvements	2,777,476
Costs capitalized subsequent to acquisition/ improvement	3,591,149
Land and improvements, gross	2,100,230
Buildings and improvements, gross	6,326,402
Land and improvements and buildings and improvements, gross	8,426,632
Accumulated depreciation	$ 1,391,368		$ 1,264,162	$ 1,139,853	$ 994,241
Rentable square feet | ft²	13,232,580
345 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Rentable square feet | ft²		110,030
Office Building [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 335,811
Initial cost, land and improvements	1,117,915
Initial cost, buildings and Improvements	2,777,476
Costs capitalized subsequent to acquisition/ improvement	2,472,731
Land and improvements, gross	1,160,138
Buildings and improvements, gross	5,207,984
Land and improvements and buildings and improvements, gross	6,368,122
Accumulated depreciation	$ 1,391,368
Rentable square feet | ft²	13,232,580
Office Building [Member] | 2829 Townsgate Rd., Thousand Oaks, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,248
Initial cost, buildings and Improvements	8,001
Costs capitalized subsequent to acquisition/ improvement	8,267
Land and improvements, gross	5,248
Buildings and improvements, gross	16,268
Land and improvements and buildings and improvements, gross	21,516
Accumulated depreciation	$ 11,862
Depreciation life	35 years
Rentable square feet | ft²	84,098
Office Building [Member] | 2240 E. Imperial Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,044
Initial cost, buildings and Improvements	11,763
Costs capitalized subsequent to acquisition/ improvement	29,509
Land and improvements, gross	1,048
Buildings and improvements, gross	41,268
Land and improvements and buildings and improvements, gross	42,316
Accumulated depreciation	$ 25,671
Depreciation life	35 years
Rentable square feet | ft²	122,870
Office Building [Member] | 2250 E. Imperial Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,579
Initial cost, buildings and Improvements	29,062
Costs capitalized subsequent to acquisition/ improvement	36,148
Land and improvements, gross	2,547
Buildings and improvements, gross	65,242
Land and improvements and buildings and improvements, gross	67,789
Accumulated depreciation	$ 52,858
Depreciation life	35 years
Rentable square feet | ft²	298,728
Office Building [Member] | 2260 E. Imperial Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,518
Initial cost, buildings and Improvements	28,370
Costs capitalized subsequent to acquisition/ improvement	36,672
Land and improvements, gross	2,547
Buildings and improvements, gross	65,013
Land and improvements and buildings and improvements, gross	67,560
Accumulated depreciation	$ 14,064
Depreciation life	35 years
Rentable square feet | ft²	298,728
Office Building [Member] | 909 N. Pacific Coast Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,577
Initial cost, buildings and Improvements	34,042
Costs capitalized subsequent to acquisition/ improvement	48,056
Land and improvements, gross	3,577
Buildings and improvements, gross	82,098
Land and improvements and buildings and improvements, gross	85,675
Accumulated depreciation	$ 38,602
Depreciation life	35 years
Rentable square feet | ft²	244,136
Office Building [Member] | 999 N. Pacific Coast Highway, El Segundo, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,407
Initial cost, buildings and Improvements	34,326
Costs capitalized subsequent to acquisition/ improvement	16,497
Land and improvements, gross	1,407
Buildings and improvements, gross	50,823
Land and improvements and buildings and improvements, gross	52,230
Accumulated depreciation	$ 23,178
Depreciation life	35 years
Rentable square feet | ft²	128,588
Office Building [Member] | 6115 W. Sunset Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,313
Initial cost, buildings and Improvements	3
Costs capitalized subsequent to acquisition/ improvement	16,458
Land and improvements, gross	2,455
Buildings and improvements, gross	15,319
Land and improvements and buildings and improvements, gross	17,774
Accumulated depreciation	$ 1,483
Depreciation life	35 years
Rentable square feet | ft²	26,105
Office Building [Member] | 6121 W. Sunset Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 11,120
Initial cost, buildings and Improvements	4,256
Costs capitalized subsequent to acquisition/ improvement	43,952
Land and improvements, gross	8,703
Buildings and improvements, gross	50,625
Land and improvements and buildings and improvements, gross	59,328
Accumulated depreciation	$ 5,631
Depreciation life	35 years
Rentable square feet | ft²	91,173
Office Building [Member] | 1525 N. Gower Street, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,318
Initial cost, buildings and Improvements	3
Costs capitalized subsequent to acquisition/ improvement	9,642
Land and improvements, gross	1,318
Buildings and improvements, gross	9,645
Land and improvements and buildings and improvements, gross	10,963
Accumulated depreciation	$ 870
Depreciation life	35 years
Rentable square feet | ft²	9,610
Office Building [Member] | 1575 N. Gower Street, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 22,153
Initial cost, buildings and Improvements	51
Costs capitalized subsequent to acquisition/ improvement	119,406
Land and improvements, gross	22,153
Buildings and improvements, gross	119,457
Land and improvements and buildings and improvements, gross	141,610
Accumulated depreciation	$ 8,149
Depreciation life	35 years
Rentable square feet | ft²	251,245
Office Building [Member] | 1500 N. El Centro Avenue, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 9,235
Initial cost, buildings and Improvements	21
Costs capitalized subsequent to acquisition/ improvement	58,582
Land and improvements, gross	9,235
Buildings and improvements, gross	58,603
Land and improvements and buildings and improvements, gross	67,838
Accumulated depreciation	$ 4,026
Depreciation life	35 years
Rentable square feet | ft²	104,504
Office Building [Member] | 1550 N. El Centro Avenue, Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 16,970
Initial cost, buildings and Improvements	39
Costs capitalized subsequent to acquisition/ improvement	135,583
Land and improvements, gross	16,970
Buildings and improvements, gross	135,622
Land and improvements and buildings and improvements, gross	152,592
Accumulated depreciation	$ 9,911
Depreciation life	35 years
Office Building [Member] | 6255 W. Sunset Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,111
Initial cost, buildings and Improvements	60,320
Costs capitalized subsequent to acquisition/ improvement	44,535
Land and improvements, gross	18,111
Buildings and improvements, gross	104,855
Land and improvements and buildings and improvements, gross	122,966
Accumulated depreciation	$ 29,278
Depreciation life	35 years
Rentable square feet | ft²	323,920
Office Building [Member] | 3750 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, buildings and Improvements	$ 1,941
Costs capitalized subsequent to acquisition/ improvement	11,153
Buildings and improvements, gross	13,094
Land and improvements and buildings and improvements, gross	13,094
Accumulated depreciation	$ 10,395
Depreciation life	35 years
Rentable square feet | ft²	10,457
Office Building [Member] | 3760 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, buildings and Improvements	$ 17,467
Costs capitalized subsequent to acquisition/ improvement	13,714
Buildings and improvements, gross	31,181
Land and improvements and buildings and improvements, gross	31,181
Accumulated depreciation	$ 25,635
Depreciation life	35 years
Rentable square feet | ft²	165,278
Office Building [Member] | 3780 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, buildings and Improvements	$ 22,319
Costs capitalized subsequent to acquisition/ improvement	23,008
Buildings and improvements, gross	45,327
Land and improvements and buildings and improvements, gross	45,327
Accumulated depreciation	$ 37,365
Depreciation life	35 years
Rentable square feet | ft²	219,777
Office Building [Member] | 3800 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, buildings and Improvements	$ 19,408
Costs capitalized subsequent to acquisition/ improvement	20,838
Buildings and improvements, gross	40,246
Land and improvements and buildings and improvements, gross	40,246
Accumulated depreciation	$ 23,575
Depreciation life	35 years
Rentable square feet | ft²	192,476
Office Building [Member] | 3840 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, buildings and Improvements	$ 13,586
Costs capitalized subsequent to acquisition/ improvement	10,364
Buildings and improvements, gross	23,950
Land and improvements and buildings and improvements, gross	23,950
Accumulated depreciation	$ 15,417
Depreciation life	35 years
Rentable square feet | ft²	136,026
Office Building [Member] | 3880 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, buildings and Improvements	$ 9,704
Costs capitalized subsequent to acquisition/ improvement	11,277
Buildings and improvements, gross	20,981
Land and improvements and buildings and improvements, gross	20,981
Accumulated depreciation	$ 3,820
Depreciation life	35 years
Rentable square feet | ft²	96,035
Office Building [Member] | 3900 Kilroy Airport Way, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, buildings and Improvements	$ 12,615
Costs capitalized subsequent to acquisition/ improvement	11,983
Buildings and improvements, gross	24,598
Land and improvements and buildings and improvements, gross	24,598
Accumulated depreciation	$ 17,147
Depreciation life	35 years
Rentable square feet | ft²	129,893
Office Building [Member] | Kilroy Airport Center, Phase IV, Long Beach, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Costs capitalized subsequent to acquisition/ improvement	$ 4,997
Buildings and improvements, gross	4,997
Land and improvements and buildings and improvements, gross	4,997
Accumulated depreciation	$ 4,997
Depreciation life	35 years
Office Building [Member] | 8560 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 9,720
Initial cost, buildings and Improvements	50,956
Costs capitalized subsequent to acquisition/ improvement	600
Land and improvements, gross	9,720
Buildings and improvements, gross	51,556
Land and improvements and buildings and improvements, gross	61,276
Accumulated depreciation	$ 4,209
Depreciation life	35 years
Rentable square feet | ft²	71,875
Office Building [Member] | 8570 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 31,693
Initial cost, buildings and Improvements	27,974
Costs capitalized subsequent to acquisition/ improvement	925
Land and improvements, gross	31,693
Buildings and improvements, gross	28,899
Land and improvements and buildings and improvements, gross	60,592
Accumulated depreciation	$ 2,085
Depreciation life	35 years
Rentable square feet | ft²	43,603
Office Building [Member] | 8580 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 10,013
Initial cost, buildings and Improvements	3,695
Costs capitalized subsequent to acquisition/ improvement	135
Land and improvements, gross	10,013
Buildings and improvements, gross	3,830
Land and improvements and buildings and improvements, gross	13,843
Accumulated depreciation	$ 264
Depreciation life	35 years
Rentable square feet | ft²	7,126
Office Building [Member] | 8590 W. Sunset Blvd, West Hollywood, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 39,954
Initial cost, buildings and Improvements	27,884
Costs capitalized subsequent to acquisition/ improvement	1,092
Land and improvements, gross	39,954
Buildings and improvements, gross	28,976
Land and improvements and buildings and improvements, gross	68,930
Accumulated depreciation	$ 2,267
Depreciation life	35 years
Rentable square feet | ft²	56,095
Office Building [Member] | 12100 W. Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 170,000
Initial cost, land and improvements	352
Initial cost, buildings and Improvements	45,611
Costs capitalized subsequent to acquisition/ improvement	18,518
Land and improvements, gross	9,633
Buildings and improvements, gross	54,848
Land and improvements and buildings and improvements, gross	64,481
Accumulated depreciation	$ 27,316
Depreciation life	35 years
Rentable square feet | ft²	152,048
Office Building [Member] | 12200 W. Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,329
Initial cost, buildings and Improvements	35,488
Costs capitalized subsequent to acquisition/ improvement	23,707
Land and improvements, gross	3,977
Buildings and improvements, gross	59,547
Land and improvements and buildings and improvements, gross	63,524
Accumulated depreciation	$ 37,257
Depreciation life	35 years
Rentable square feet | ft²	150,832
Office Building [Member] | 12233 Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 22,100
Initial cost, buildings and Improvements	53,170
Costs capitalized subsequent to acquisition/ improvement	3,986
Land and improvements, gross	22,100
Buildings and improvements, gross	57,156
Land and improvements and buildings and improvements, gross	79,256
Accumulated depreciation	$ 11,832
Depreciation life	35 years
Rentable square feet | ft²	151,029
Office Building [Member] | 12312 W. Olympic Blvd., Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,325
Initial cost, buildings and Improvements	12,202
Costs capitalized subsequent to acquisition/ improvement	11,341
Land and improvements, gross	3,399
Buildings and improvements, gross	23,469
Land and improvements and buildings and improvements, gross	26,868
Accumulated depreciation	$ 12,017
Depreciation life	35 years
Rentable square feet | ft²	76,644
Office Building [Member] | 1633 26th St., Santa Monica, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,080
Initial cost, buildings and Improvements	6,672
Costs capitalized subsequent to acquisition/ improvement	3,139
Land and improvements, gross	2,040
Buildings and improvements, gross	9,851
Land and improvements and buildings and improvements, gross	11,891
Accumulated depreciation	$ 6,908
Depreciation life	35 years
Rentable square feet | ft²	43,857
Office Building [Member] | 2100/2110 Colorado Ave., Santa Monica, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 91,332
Initial cost, land and improvements	5,474
Initial cost, buildings and Improvements	26,087
Costs capitalized subsequent to acquisition/ improvement	14,620
Land and improvements, gross	5,476
Buildings and improvements, gross	40,705
Land and improvements and buildings and improvements, gross	46,181
Accumulated depreciation	$ 24,031
Depreciation life	35 years
Rentable square feet | ft²	102,864
Office Building [Member] | 3130 Wilshire Blvd., Santa Monica, [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 8,921
Initial cost, buildings and Improvements	6,579
Costs capitalized subsequent to acquisition/ improvement	15,992
Land and improvements, gross	9,188
Buildings and improvements, gross	22,304
Land and improvements and buildings and improvements, gross	31,492
Accumulated depreciation	$ 14,674
Depreciation life	35 years
Rentable square feet | ft²	90,074
Office Building [Member] | 501 Santa Monica Blvd., Santa Monica, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,547
Initial cost, buildings and Improvements	12,044
Costs capitalized subsequent to acquisition/ improvement	14,129
Land and improvements, gross	4,551
Buildings and improvements, gross	26,169
Land and improvements and buildings and improvements, gross	30,720
Accumulated depreciation	$ 15,614
Depreciation life	35 years
Rentable square feet | ft²	76,803
Office Building [Member] | 2211 Michelson, Irvine, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 9,319
Initial cost, buildings and Improvements	82,836
Costs capitalized subsequent to acquisition/ improvement	6,629
Land and improvements, gross	9,319
Buildings and improvements, gross	89,465
Land and improvements and buildings and improvements, gross	98,784
Accumulated depreciation	$ 27,097
Depreciation life	35 years
Rentable square feet | ft²	271,556
Office Building [Member] | 12225 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,700
Initial cost, buildings and Improvements	9,633
Costs capitalized subsequent to acquisition/ improvement	3,493
Land and improvements, gross	1,673
Buildings and improvements, gross	13,153
Land and improvements and buildings and improvements, gross	14,826
Accumulated depreciation	$ 8,905
Depreciation life	35 years
Rentable square feet | ft²	58,401
Office Building [Member] | 12235 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,507
Initial cost, buildings and Improvements	8,543
Costs capitalized subsequent to acquisition/ improvement	8,965
Land and improvements, gross	1,540
Buildings and improvements, gross	17,475
Land and improvements and buildings and improvements, gross	19,015
Accumulated depreciation	$ 9,681
Depreciation life	35 years
Rentable square feet | ft²	53,751
Office Building [Member] | 12340 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,201
Initial cost, buildings and Improvements	13,896
Costs capitalized subsequent to acquisition/ improvement	9,858
Land and improvements, gross	4,201
Buildings and improvements, gross	23,754
Land and improvements and buildings and improvements, gross	27,955
Accumulated depreciation	$ 11,257
Depreciation life	35 years
Rentable square feet | ft²	89,272
Office Building [Member] | 12390 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,453
Initial cost, buildings and Improvements	11,981
Costs capitalized subsequent to acquisition/ improvement	3,896
Land and improvements, gross	3,453
Buildings and improvements, gross	15,877
Land and improvements and buildings and improvements, gross	19,330
Accumulated depreciation	$ 8,995
Depreciation life	35 years
Rentable square feet | ft²	70,140
Office Building [Member] | 12348 High Bluff Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,629
Initial cost, buildings and Improvements	3,096
Costs capitalized subsequent to acquisition/ improvement	6,141
Land and improvements, gross	1,629
Buildings and improvements, gross	9,237
Land and improvements and buildings and improvements, gross	10,866
Accumulated depreciation	$ 6,206
Depreciation life	35 years
Rentable square feet | ft²	38,806
Office Building [Member] | 12400 High Bluff Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 15,167
Initial cost, buildings and Improvements	40,497
Costs capitalized subsequent to acquisition/ improvement	14,337
Land and improvements, gross	15,167
Buildings and improvements, gross	54,834
Land and improvements and buildings and improvements, gross	70,001
Accumulated depreciation	$ 27,243
Depreciation life	35 years
Rentable square feet | ft²	209,220
Office Building [Member] | 3579 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 2,167
Initial cost, buildings and Improvements	6,897
Costs capitalized subsequent to acquisition/ improvement	7,449
Land and improvements, gross	2,858
Buildings and improvements, gross	13,655
Land and improvements and buildings and improvements, gross	16,513
Accumulated depreciation	$ 9,512
Depreciation life	35 years
Rentable square feet | ft²	52,418
Office Building [Member] | 3611 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,184
Initial cost, buildings and Improvements	19,352
Costs capitalized subsequent to acquisition/ improvement	18,881
Land and improvements, gross	5,259
Buildings and improvements, gross	37,158
Land and improvements and buildings and improvements, gross	42,417
Accumulated depreciation	$ 24,251
Depreciation life	35 years
Rentable square feet | ft²	129,656
Office Building [Member] | 3661 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,038
Initial cost, buildings and Improvements	21,144
Costs capitalized subsequent to acquisition/ improvement	16,178
Land and improvements, gross	4,725
Buildings and improvements, gross	36,635
Land and improvements and buildings and improvements, gross	41,360
Accumulated depreciation	$ 20,619
Depreciation life	35 years
Rentable square feet | ft²	128,364
Office Building [Member] | 3721 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,297
Initial cost, buildings and Improvements	18,967
Costs capitalized subsequent to acquisition/ improvement	14,569
Land and improvements, gross	4,254
Buildings and improvements, gross	33,579
Land and improvements and buildings and improvements, gross	37,833
Accumulated depreciation	$ 15,893
Depreciation life	35 years
Rentable square feet | ft²	115,193
Office Building [Member] | 3811 Valley Centre Dr., Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,452
Initial cost, buildings and Improvements	16,152
Costs capitalized subsequent to acquisition/ improvement	20,105
Land and improvements, gross	4,457
Buildings and improvements, gross	35,252
Land and improvements and buildings and improvements, gross	39,709
Accumulated depreciation	$ 21,545
Depreciation life	35 years
Rentable square feet | ft²	112,067
Office Building [Member] | 12770 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 9,360
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	33,628
Land and improvements, gross	9,360
Buildings and improvements, gross	33,628
Land and improvements and buildings and improvements, gross	42,988
Accumulated depreciation	$ 1,950
Depreciation life	35 years
Rentable square feet | ft²	73,032
Office Building [Member] | 12780 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,398
Initial cost, buildings and Improvements	54,954
Costs capitalized subsequent to acquisition/ improvement	14,775
Land and improvements, gross	18,398
Buildings and improvements, gross	69,729
Land and improvements and buildings and improvements, gross	88,127
Accumulated depreciation	$ 11,995
Depreciation life	35 years
Rentable square feet | ft²	140,591
Office Building [Member] | 12790 El Camino Real, Del Mar, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 10,252
Initial cost, buildings and Improvements	21,236
Costs capitalized subsequent to acquisition/ improvement	1,426
Land and improvements, gross	10,252
Buildings and improvements, gross	22,662
Land and improvements and buildings and improvements, gross	32,914
Accumulated depreciation	$ 4,794
Depreciation life	35 years
Rentable square feet | ft²	78,836
Office Building [Member] | 13280 Evening Creek Dr. South, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 3,701
Initial cost, buildings and Improvements	8,398
Costs capitalized subsequent to acquisition/ improvement	4,730
Land and improvements, gross	3,701
Buildings and improvements, gross	13,128
Land and improvements and buildings and improvements, gross	16,829
Accumulated depreciation	$ 5,167
Depreciation life	35 years
Rentable square feet | ft²	41,196
Office Building [Member] | 13290 Evening Creek Dr. South, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,229
Initial cost, buildings and Improvements	11,871
Costs capitalized subsequent to acquisition/ improvement	5,919
Land and improvements, gross	5,229
Buildings and improvements, gross	17,790
Land and improvements and buildings and improvements, gross	23,019
Accumulated depreciation	$ 5,950
Depreciation life	35 years
Rentable square feet | ft²	61,180
Office Building [Member] | 13480 Evening Creek Dr. North, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,997
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	52,143
Land and improvements, gross	7,997
Buildings and improvements, gross	52,143
Land and improvements and buildings and improvements, gross	60,140
Accumulated depreciation	$ 18,660
Depreciation life	35 years
Rentable square feet | ft²	154,157
Office Building [Member] | 13500 Evening Creek Dr. North, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,581
Initial cost, buildings and Improvements	35,903
Costs capitalized subsequent to acquisition/ improvement	15,331
Land and improvements, gross	7,580
Buildings and improvements, gross	51,235
Land and improvements and buildings and improvements, gross	58,815
Accumulated depreciation	$ 20,471
Depreciation life	35 years
Rentable square feet | ft²	137,658
Office Building [Member] | 13520 Evening Creek Dr. North, I-15 Corridor, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,581
Initial cost, buildings and Improvements	35,903
Costs capitalized subsequent to acquisition/ improvement	15,427
Land and improvements, gross	7,580
Buildings and improvements, gross	51,331
Land and improvements and buildings and improvements, gross	58,911
Accumulated depreciation	$ 22,819
Depreciation life	35 years
Rentable square feet | ft²	146,701
Office Building [Member] | 2305 Historic Decatur Rd., Point Loma, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,240
Initial cost, buildings and Improvements	22,220
Costs capitalized subsequent to acquisition/ improvement	7,309
Land and improvements, gross	5,240
Buildings and improvements, gross	29,529
Land and improvements and buildings and improvements, gross	34,769
Accumulated depreciation	$ 9,248
Depreciation life	35 years
Rentable square feet | ft²	107,456
Office Building [Member] | 4690 Executive Dr., University Towne Centre, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 1,623
Initial cost, buildings and Improvements	7,926
Costs capitalized subsequent to acquisition/ improvement	3,668
Land and improvements, gross	1,623
Buildings and improvements, gross	11,594
Land and improvements and buildings and improvements, gross	13,217
Accumulated depreciation	$ 7,324
Depreciation life	35 years
Rentable square feet | ft²	47,846
Office Building [Member] | 4100 Bohannon Dr., Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,835
Initial cost, buildings and Improvements	15,526
Costs capitalized subsequent to acquisition/ improvement	525
Land and improvements, gross	4,860
Buildings and improvements, gross	16,026
Land and improvements and buildings and improvements, gross	20,886
Accumulated depreciation	$ 3,954
Depreciation life	35 years
Rentable square feet | ft²	47,379
Office Building [Member] | 4200 Bohannon Dr., Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,798
Initial cost, buildings and Improvements	15,406
Costs capitalized subsequent to acquisition/ improvement	3,222
Land and improvements, gross	4,662
Buildings and improvements, gross	18,764
Land and improvements and buildings and improvements, gross	23,426
Accumulated depreciation	$ 4,915
Depreciation life	35 years
Rentable square feet | ft²	45,451
Office Building [Member] | 4300 Bohannon Dr., Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 6,527
Initial cost, buildings and Improvements	20,958
Costs capitalized subsequent to acquisition/ improvement	2,955
Land and improvements, gross	6,470
Buildings and improvements, gross	23,970
Land and improvements and buildings and improvements, gross	30,440
Accumulated depreciation	$ 6,996
Depreciation life	35 years
Rentable square feet | ft²	63,079
Office Building [Member] | 4400 Bohannon Dr., Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,798
Initial cost, buildings and Improvements	15,406
Costs capitalized subsequent to acquisition/ improvement	2,943
Land and improvements, gross	4,939
Buildings and improvements, gross	18,208
Land and improvements and buildings and improvements, gross	23,147
Accumulated depreciation	$ 5,066
Depreciation life	35 years
Rentable square feet | ft²	48,146
Office Building [Member] | 4500 Bohannon Dr., Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 6,527
Initial cost, buildings and Improvements	20,957
Costs capitalized subsequent to acquisition/ improvement	2,025
Land and improvements, gross	6,470
Buildings and improvements, gross	23,039
Land and improvements and buildings and improvements, gross	29,509
Accumulated depreciation	$ 5,665
Depreciation life	35 years
Rentable square feet | ft²	63,078
Office Building [Member] | 4600 Bohannon Dr., Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 4,798
Initial cost, buildings and Improvements	15,406
Costs capitalized subsequent to acquisition/ improvement	3,326
Land and improvements, gross	4,939
Buildings and improvements, gross	18,591
Land and improvements and buildings and improvements, gross	23,530
Accumulated depreciation	$ 4,924
Depreciation life	35 years
Rentable square feet | ft²	48,147
Office Building [Member] | 4700 Bohannon Dr., Menlo Park, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 6,527
Initial cost, buildings and Improvements	20,958
Costs capitalized subsequent to acquisition/ improvement	1,422
Land and improvements, gross	6,470
Buildings and improvements, gross	22,437
Land and improvements and buildings and improvements, gross	28,907
Accumulated depreciation	$ 5,492
Depreciation life	35 years
Rentable square feet | ft²	63,078
Office Building [Member] | 1290 - 1300 Terra Bella Ave., Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 28,730
Initial cost, buildings and Improvements	27,555
Costs capitalized subsequent to acquisition/ improvement	29
Land and improvements, gross	28,730
Buildings and improvements, gross	27,584
Land and improvements and buildings and improvements, gross	56,314
Accumulated depreciation	$ 3,589
Depreciation life	35 years
Rentable square feet | ft²	114,175
Office Building [Member] | 331 Fairchild Dr., Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,396
Initial cost, buildings and Improvements	17,712
Costs capitalized subsequent to acquisition/ improvement	7,955
Land and improvements, gross	18,396
Buildings and improvements, gross	25,667
Land and improvements and buildings and improvements, gross	44,063
Accumulated depreciation	$ 4,674
Depreciation life	35 years
Rentable square feet | ft²	87,147
Office Building [Member] | 680 E. Middlefield Rd., Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 34,605
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	56,464
Land and improvements, gross	34,605
Buildings and improvements, gross	56,464
Land and improvements and buildings and improvements, gross	91,069
Accumulated depreciation	$ 7,908
Depreciation life	35 years
Rentable square feet | ft²	170,090
Office Building [Member] | 690 E. Middlefield Rd., Mountain View, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 34,755
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	56,707
Land and improvements, gross	34,755
Buildings and improvements, gross	56,707
Land and improvements and buildings and improvements, gross	91,462
Accumulated depreciation	$ 7,942
Depreciation life	35 years
Rentable square feet | ft²	170,823
Office Building [Member] | 1701 Page Mill Rd, Palo Alto, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	99,522
Costs capitalized subsequent to acquisition/ improvement	25
Land and improvements, gross	0
Buildings and improvements, gross	99,547
Land and improvements and buildings and improvements, gross	99,547
Accumulated depreciation	$ 6,000
Depreciation life	35 years
Rentable square feet | ft²	128,688
Office Building [Member] | 3150 Porter Drive, Palo Alto, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	21,715
Costs capitalized subsequent to acquisition/ improvement	4
Land and improvements, gross	0
Buildings and improvements, gross	21,719
Land and improvements and buildings and improvements, gross	21,719
Accumulated depreciation	$ 1,591
Depreciation life	35 years
Rentable square feet | ft²	36,897
Office Building [Member] | 900 Jefferson Ave., Redwood City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 16,668
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	109,313
Land and improvements, gross	18,063
Buildings and improvements, gross	107,918
Land and improvements and buildings and improvements, gross	125,981
Accumulated depreciation	$ 11,977
Depreciation life	35 years
Rentable square feet | ft²	228,505
Office Building [Member] | 900 Middlefield Rd., Redwood City, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,959
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	49,862
Land and improvements, gross	8,626
Buildings and improvements, gross	49,195
Land and improvements and buildings and improvements, gross	57,821
Accumulated depreciation	$ 5,204
Depreciation life	35 years
Rentable square feet | ft²	118,764
Office Building [Member] | 303 Second St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 63,550
Initial cost, buildings and Improvements	154,153
Costs capitalized subsequent to acquisition/ improvement	70,133
Land and improvements, gross	63,550
Buildings and improvements, gross	224,286
Land and improvements and buildings and improvements, gross	287,836
Accumulated depreciation	$ 71,553
Depreciation life	35 years
Rentable square feet | ft²	740,047
Office Building [Member] | 100 First St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 49,150
Initial cost, buildings and Improvements	131,238
Costs capitalized subsequent to acquisition/ improvement	63,503
Land and improvements, gross	49,150
Buildings and improvements, gross	194,741
Land and improvements and buildings and improvements, gross	243,891
Accumulated depreciation	$ 53,081
Depreciation life	35 years
Rentable square feet | ft²	467,095
Office Building [Member] | 250 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 7,630
Initial cost, buildings and Improvements	22,770
Costs capitalized subsequent to acquisition/ improvement	4,466
Land and improvements, gross	7,630
Buildings and improvements, gross	27,236
Land and improvements and buildings and improvements, gross	34,866
Accumulated depreciation	$ 9,786
Depreciation life	35 years
Rentable square feet | ft²	100,850
Office Building [Member] | 201 Third St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 19,260
Initial cost, buildings and Improvements	84,018
Costs capitalized subsequent to acquisition/ improvement	66,543
Land and improvements, gross	19,260
Buildings and improvements, gross	150,561
Land and improvements and buildings and improvements, gross	169,821
Accumulated depreciation	$ 46,541
Depreciation life	35 years
Rentable square feet | ft²	346,538
Office Building [Member] | 301 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 5,910
Initial cost, buildings and Improvements	22,450
Costs capitalized subsequent to acquisition/ improvement	5,109
Land and improvements, gross	5,910
Buildings and improvements, gross	27,559
Land and improvements and buildings and improvements, gross	33,469
Accumulated depreciation	$ 8,375
Depreciation life	35 years
Rentable square feet | ft²	82,834
Office Building [Member] | 360 Third St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	88,235
Costs capitalized subsequent to acquisition/ improvement	112,885
Land and improvements, gross	28,504
Buildings and improvements, gross	172,616
Land and improvements and buildings and improvements, gross	201,120
Accumulated depreciation	$ 39,931
Depreciation life	35 years
Rentable square feet | ft²	429,796
Office Building [Member] | 333 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 18,645
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	78,426
Land and improvements, gross	18,645
Buildings and improvements, gross	78,426
Land and improvements and buildings and improvements, gross	97,071
Accumulated depreciation	$ 6,451
Depreciation life	35 years
Rentable square feet | ft²	185,602
Office Building [Member] | 350 Mission Street, San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 52,815
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	213,459
Land and improvements, gross	52,815
Buildings and improvements, gross	213,459
Land and improvements and buildings and improvements, gross	266,274
Accumulated depreciation	$ 17,818
Depreciation life	35 years
Rentable square feet | ft²	455,340
Office Building [Member] | 100 Hooper Street, San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 78,564
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	179,739
Land and improvements, gross	78,564
Buildings and improvements, gross	179,739
Land and improvements and buildings and improvements, gross	258,303
Accumulated depreciation	$ 1,043
Depreciation life	35 years
Office Building [Member] | 345 Brannan St., San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 29,405
Initial cost, buildings and Improvements	113,179
Costs capitalized subsequent to acquisition/ improvement	0
Land and improvements, gross	29,405
Buildings and improvements, gross	113,179
Land and improvements and buildings and improvements, gross	142,584
Accumulated depreciation	$ 0
Depreciation life	35 years
Rentable square feet | ft²	110,030
Office Building [Member] | 345 Oyster Point Blvd., South San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 13,745
Initial cost, buildings and Improvements	18,575
Costs capitalized subsequent to acquisition/ improvement	2
Land and improvements, gross	13,745
Buildings and improvements, gross	18,577
Land and improvements and buildings and improvements, gross	32,322
Accumulated depreciation	$ 611
Depreciation life	35 years
Rentable square feet | ft²	40,410
Office Building [Member] | 347 Oyster Point Blvd, South San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 14,071
Initial cost, buildings and Improvements	18,289
Costs capitalized subsequent to acquisition/ improvement	8
Land and improvements, gross	14,071
Buildings and improvements, gross	18,297
Land and improvements and buildings and improvements, gross	32,368
Accumulated depreciation	$ 602
Depreciation life	35 years
Rentable square feet | ft²	39,780
Office Building [Member] | 349 Oyster Point Blvd., South San Francisco, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 23,112
Initial cost, buildings and Improvements	22,601
Costs capitalized subsequent to acquisition/ improvement	771
Land and improvements, gross	23,112
Buildings and improvements, gross	23,372
Land and improvements and buildings and improvements, gross	46,484
Accumulated depreciation	$ 919
Depreciation life	35 years
Rentable square feet | ft²	65,340
Office Building [Member] | 505 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 37,843
Initial cost, buildings and Improvements	1,163
Costs capitalized subsequent to acquisition/ improvement	50,450
Land and improvements, gross	37,943
Buildings and improvements, gross	51,513
Land and improvements and buildings and improvements, gross	89,456
Accumulated depreciation	$ 6,388
Depreciation life	35 years
Rentable square feet | ft²	212,322
Office Building [Member] | 555 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 37,843
Initial cost, buildings and Improvements	1,163
Costs capitalized subsequent to acquisition/ improvement	50,447
Land and improvements, gross	37,943
Buildings and improvements, gross	51,510
Land and improvements and buildings and improvements, gross	89,453
Accumulated depreciation	$ 6,387
Depreciation life	35 years
Rentable square feet | ft²	212,322
Office Building [Member] | 605 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 29,014
Initial cost, buildings and Improvements	891
Costs capitalized subsequent to acquisition/ improvement	77,281
Land and improvements, gross	29,090
Buildings and improvements, gross	78,096
Land and improvements and buildings and improvements, gross	107,186
Accumulated depreciation	$ 14,036
Depreciation life	35 years
Rentable square feet | ft²	162,785
Office Building [Member] | 599 Mathilda Ave., Sunnyvale, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 13,538
Initial cost, buildings and Improvements	12,559
Costs capitalized subsequent to acquisition/ improvement	58
Land and improvements, gross	13,538
Buildings and improvements, gross	12,617
Land and improvements and buildings and improvements, gross	26,155
Accumulated depreciation	$ 3,568
Depreciation life	35 years
Rentable square feet | ft²	76,031
Office Building [Member] | 601 108th Ave., Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	214,095
Costs capitalized subsequent to acquisition/ improvement	33,860
Land and improvements, gross	0
Buildings and improvements, gross	247,955
Land and improvements and buildings and improvements, gross	247,955
Accumulated depreciation	$ 70,018
Depreciation life	35 years
Rentable square feet | ft²	488,470
Office Building [Member] | 10900 NE 4th St., Bellevue, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 25,080
Initial cost, buildings and Improvements	150,877
Costs capitalized subsequent to acquisition/ improvement	36,619
Land and improvements, gross	25,080
Buildings and improvements, gross	187,496
Land and improvements and buildings and improvements, gross	212,576
Accumulated depreciation	$ 46,105
Depreciation life	35 years
Rentable square feet | ft²	428,557
Office Building [Member] | 837 N. 34th St., Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	37,404
Costs capitalized subsequent to acquisition/ improvement	3,817
Land and improvements, gross	0
Buildings and improvements, gross	41,221
Land and improvements and buildings and improvements, gross	41,221
Accumulated depreciation	$ 9,697
Depreciation life	35 years
Rentable square feet | ft²	111,580
Office Building [Member] | 701 N. 34th St., Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	48,027
Costs capitalized subsequent to acquisition/ improvement	7,989
Land and improvements, gross	0
Buildings and improvements, gross	56,016
Land and improvements and buildings and improvements, gross	56,016
Accumulated depreciation	$ 13,785
Depreciation life	35 years
Rentable square feet | ft²	138,994
Office Building [Member] | 801 N. 34th St., Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 0
Initial cost, buildings and Improvements	58,537
Costs capitalized subsequent to acquisition/ improvement	1,657
Land and improvements, gross	0
Buildings and improvements, gross	60,194
Land and improvements and buildings and improvements, gross	60,194
Accumulated depreciation	$ 14,159
Depreciation life	35 years
Rentable square feet | ft²	169,412
Office Building [Member] | 320 Westlake Avenue North, WA[Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 74,479
Initial cost, land and improvements	14,710
Initial cost, buildings and Improvements	82,018
Costs capitalized subsequent to acquisition/ improvement	5,063
Land and improvements, gross	14,710
Buildings and improvements, gross	87,081
Land and improvements and buildings and improvements, gross	101,791
Accumulated depreciation	$ 16,693
Depreciation life	35 years
Rentable square feet | ft²	184,644
Office Building [Member] | 321 Terry Avenue North, Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 10,430
Initial cost, buildings and Improvements	60,003
Costs capitalized subsequent to acquisition/ improvement	9,987
Land and improvements, gross	10,430
Buildings and improvements, gross	69,990
Land and improvements and buildings and improvements, gross	80,420
Accumulated depreciation	$ 13,046
Depreciation life	35 years
Rentable square feet | ft²	135,755
Office Building [Member] | 401 Terry Avenue North, Lake Union, WA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, land and improvements	$ 22,500
Initial cost, buildings and Improvements	77,046
Costs capitalized subsequent to acquisition/ improvement	0
Land and improvements, gross	22,500
Buildings and improvements, gross	77,046
Land and improvements and buildings and improvements, gross	99,546
Accumulated depreciation	$ 12,888
Depreciation life	35 years
Rentable square feet | ft²	140,605
Undeveloped Land and CIP Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial cost, encumbrances	$ 0
Initial cost, land and improvements	940,092
Initial cost, buildings and Improvements	0
Costs capitalized subsequent to acquisition/ improvement	1,118,418
Land and improvements, gross	940,092
Buildings and improvements, gross	1,118,418
Land and improvements and buildings and improvements, gross	2,058,510
Accumulated depreciation	$ 0
Rentable square feet | ft²	0