v3.3.1.900

Schedule III - Real Estate and Accumulated Depreciation (Details) $ in Thousands | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) ft² | Jun. 30, 2015 USD ($) | Dec. 31, 2014 ft² | Jan. 31, 2014 ft² | Dec. 31, 2013 USD ($) ft² | Dec. 31, 2012 USD ($) | Dec. 31, 2010 USD ($)
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation |  | $ 994,241 |  |  | $ 947,664 | $ 818,957 | $ 756,515
Net Rentable Area | ft² | 1,046,394 |  | 1,471,319 | 79,000 | 200,306 |  |
Office Building [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 373,886 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | 835,393 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 2,617,322 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,514,091 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 875,794 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 4,091,012 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 4,966,806 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 994,241 |  |  |  |  |  |
Net Rentable Area | ft² | 13,032,406 |  |  |  |  |  |
Office Building [Member] | 801 N. 34th St., Lake Union, WA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 58,537 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 164 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 58,701 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 58,701 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 7,676 |  |  |  |  |  |
Net Rentable Area | ft² | 169,412 |  |  |  |  |  |
Office Building [Member] | Westlake Avenue North [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 79,667 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | 14,710 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 82,018 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,087 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 14,710 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 83,105 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 97,815 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 8,236 |  |  |  |  |  |
Net Rentable Area | ft² | 184,643 |  |  |  |  |  |
Office Building [Member] | Pacific Center Boulevard, Sorrento Mesa, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,693 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 6,280 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 4,220 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,693 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 10,500 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 13,193 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,615 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 67,995 |  |  |  |  |  |
Office Building [Member] | Executive Drive, UTC, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,623 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 7,926 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,639 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,623 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 10,565 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 12,188 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,992 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 47,846 |  |  |  |  |  |
Office Building [Member] | Valley Centre Drive, Del Mar, California Two [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,184 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 19,352 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 18,405 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,259 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 36,682 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 41,941 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 19,372 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 130,047 |  |  |  |  |  |
Office Building [Member] | 23925 Park Sorrento, Calabasas, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 3,987 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | 50 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 2,346 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 493 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 50 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 2,839 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 2,889 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,587 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 11,789 |  |  |  |  |  |
Office Building [Member] | 23975 Park Sorrento, Calabasas, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 765 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 17,720 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 6,416 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 765 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 24,136 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 24,901 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 13,702 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 104,797 |  |  |  |  |  |
Office Building [Member] | 24025 Park Sorrento, Calabasas, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 845 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,896 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 6,121 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 845 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,017 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,862 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 12,503 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 108,671 |  |  |  |  |  |
Office Building [Member] | Townsgate Road, Thousand Oaks, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 5,248 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 8,001 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 7,417 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,247 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 15,419 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 20,666 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 9,764 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 81,067 |  |  |  |  |  |
Office Building [Member] | 2240 E. Imperial Highway, El Segundo, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,044 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 11,763 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 29,448 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,048 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 41,207 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 42,255 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 21,837 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 122,870 |  |  |  |  |  |
Office Building [Member] | 2250 E. Imperial Highway, El Segundo, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,579 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 29,062 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 34,953 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,547 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 64,047 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 66,594 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 46,814 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 298,728 |  |  |  |  |  |
Office Building [Member] | 2260 E. Imperial Highway, El Segundo, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,518 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 28,370 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 36,771 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,547 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 65,112 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 67,659 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 7,312 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 298,728 |  |  |  |  |  |
Office Building [Member] | 909 Sepulveda Boulevard, El Segundo, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 65,563 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | 3,577 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 34,042 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 42,869 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,577 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 76,911 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 80,488 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 29,058 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 241,607 |  |  |  |  |  |
Office Building [Member] | 999 Sepulveda Boulevard, El Segundo, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,407 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 34,326 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 12,238 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,407 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 46,564 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 47,971 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 18,201 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 128,592 |  |  |  |  |  |
Office Building [Member] | 6121 W. Sunset Boulevard, Los Angeles, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 11,120 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 4,256 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 73,250 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 8,703 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 79,923 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 88,626 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,040 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 82,442 |  |  |  |  |  |
Office Building [Member] | 6115 W. Sunset Boulevard, Los Angeles, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,313 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 3 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 25,503 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,455 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 24,364 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 26,819 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 308 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 26,075 |  |  |  |  |  |
Office Building [Member] | 3750 Kilroy Airport Way, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | $ 1,941 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 10,463 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 12,404 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 12,404 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 9,280 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 10,457 |  |  |  |  |  |
Office Building [Member] | 3760 Kilroy Airport Way, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | $ 17,467 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 10,734 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 28,201 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 28,201 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 21,954 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 165,278 |  |  |  |  |  |
Office Building [Member] | 3780 Kilroy Airport Way, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | $ 22,319 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 17,939 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 40,258 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 40,258 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 32,824 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 219,745 |  |  |  |  |  |
Office Building [Member] | 3800 Kilroy Airport Way, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | $ 19,408 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 17,263 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 36,671 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 36,671 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 20,556 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 192,476 |  |  |  |  |  |
Office Building [Member] | 3840 Kilroy Airport Way, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | $ 13,586 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 9,337 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,923 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,923 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 13,222 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 136,026 |  |  |  |  |  |
Office Building [Member] | 3880 Kilroy Airport Way, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | $ 9,704 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 11,086 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 20,790 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 20,790 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,722 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 96,035 |  |  |  |  |  |
Office Building [Member] | 3900 Kilroy Airport Way, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | $ 12,615 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 9,949 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,564 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,564 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 13,958 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 126,840 |  |  |  |  |  |
Office Building [Member] | Kilroy Airport Center, Phase IV, Long Beach, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | $ 4,997 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements |  | 4,997 |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements |  | 4,997 |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation |  | $ 4,984 |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Office Building [Member] | 12100 W. Olympic Boulevard, Los Angeles, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 352 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 45,611 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 16,258 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 9,633 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 52,588 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 62,221 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 21,521 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 150,167 |  |  |  |  |  |
Office Building [Member] | 12200 W. Olympic Boulevard, Los Angeles, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,329 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 35,488 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 17,561 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,977 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 53,401 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 57,378 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 31,401 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 150,117 |  |  |  |  |  |
Office Building [Member] | 12233 Olympic Blvd, Los Angeles, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 22,100 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 53,170 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,695 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 22,100 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 54,865 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 76,965 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,616 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 151,029 |  |  |  |  |  |
Office Building [Member] | 12312 W. Olympic Boulevard, Los Angeles, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 3,325 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 12,202 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 11,307 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,399 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 23,435 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 26,834 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 7,687 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 76,644 |  |  |  |  |  |
Office Building [Member] | 6255 Sunset Boulevard, Los Angeles, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 18,111 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 60,320 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 32,840 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 18,111 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 93,160 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 111,271 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 12,693 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 324,617 |  |  |  |  |  |
Office Building [Member] | 1633 26th Street, Santa Monica, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,080 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 6,672 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,955 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,040 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 9,667 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 11,707 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,996 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 44,915 |  |  |  |  |  |
Office Building [Member] | 2100 Colorado Avenue, Santa Monica, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 96,354 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | 5,474 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 26,087 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 13,998 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,476 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 40,083 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 45,559 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 18,941 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 102,864 |  |  |  |  |  |
Office Building [Member] | 3130 Wilshire Boulevard, Santa Monica, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 8,921 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 6,579 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 11,929 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 9,188 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 18,241 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 27,429 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 12,144 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 88,340 |  |  |  |  |  |
Office Building [Member] | 501 Santa Monica Boulevard, Santa Monica, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,547 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 12,044 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 8,861 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,551 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 20,901 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 25,452 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 11,794 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 73,115 |  |  |  |  |  |
Office Building [Member] | Michelson Drive Irvine CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 9,319 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 82,836 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 4,163 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 9,319 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 86,999 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 96,318 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 17,512 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 271,556 |  |  |  |  |  |
Office Building [Member] | 12225 El Camino Real, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,700 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 9,633 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,969 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,660 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 12,642 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 14,302 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 7,013 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 58,401 |  |  |  |  |  |
Office Building [Member] | 12235 El Camino Real, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,507 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 8,543 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 4,943 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,554 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 13,439 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 14,993 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 8,102 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 54,673 |  |  |  |  |  |
Office Building [Member] | 12340 El Camino Real, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,201 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 13,896 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 7,981 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,201 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 21,877 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 26,078 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 8,875 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 87,774 |  |  |  |  |  |
Office Building [Member] | 12390 El Camino Real, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 3,453 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 11,981 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,344 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,453 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 13,325 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 16,778 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 7,920 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 72,332 |  |  |  |  |  |
Office Building [Member] | 12348 High Bluff Drive, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,629 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 3,096 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 4,686 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,629 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 7,782 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 9,411 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,164 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 38,806 |  |  |  |  |  |
Office Building [Member] | 12400 High Bluff Drive, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 15,167 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 40,497 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 12,551 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 15,167 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 53,048 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 68,215 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 21,723 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 209,220 |  |  |  |  |  |
Office Building [Member] | 3579 Valley Centre Drive, Del Mar, California One [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,167 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 6,897 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 7,400 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,858 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 13,606 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 16,464 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 7,788 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 50,677 |  |  |  |  |  |
Office Building [Member] | 3661 Valley Centre Drive, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,038 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 21,144 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 12,448 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,725 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 32,905 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 37,630 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 16,408 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 129,051 |  |  |  |  |  |
Office Building [Member] | 3721 Valley Centre Drive, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,297 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,967 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 12,819 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,254 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 31,829 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 36,083 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 11,283 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 114,780 |  |  |  |  |  |
Office Building [Member] | 3811 Valley Centre Drive, Del Mar, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 3,452 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,152 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 20,092 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,457 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 35,239 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 39,696 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 17,641 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 112,067 |  |  |  |  |  |
Office Building [Member] | 12770 El Camino Real, Del Mar, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 9,360 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 22,492 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 9,360 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,492 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 31,852 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | (9) |  |  |  |  |  |
Office Building [Member] | El Camino Real, Del Mar, California Five [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 18,398 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 54,954 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,623 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 18,398 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 56,577 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 74,975 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,942 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 140,591 |  |  |  |  |  |
Office Building [Member] | El Camino Real, Del Mar, California Six [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 10,252 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 21,236 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,202 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 10,252 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,438 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 32,690 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,905 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 78,349 |  |  |  |  |  |
Office Building [Member] | 13280 Evening Creek Drive, South I-15 Corridor, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 3,701 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 8,398 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 4,590 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,701 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 12,988 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 16,689 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,349 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 41,196 |  |  |  |  |  |
Office Building [Member] | 13290 Evening Creek Drive, South I-15 Corridor, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 5,229 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 11,871 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 5,898 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,229 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 17,769 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,998 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,418 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 61,180 |  |  |  |  |  |
Office Building [Member] | 13480 Evening Creek Drive, North I-15 Corridor, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 7,997 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 48,103 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 7,997 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 48,103 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 56,100 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 13,230 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 149,817 |  |  |  |  |  |
Office Building [Member] | 13500 Evening Creek Drive, North I-15 Corridor, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 7,581 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 35,903 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 8,540 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 7,580 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 44,444 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 52,024 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 15,768 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 147,533 |  |  |  |  |  |
Office Building [Member] | 13520 Evening Creek Drive, North I-15 Corridor, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 7,581 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 35,903 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 10,094 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 7,580 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 45,998 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 53,578 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 17,422 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 141,128 |  |  |  |  |  |
Office Building [Member] | 2355 Northside Drive, Mission Valley, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,066 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 8,332 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,085 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,344 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 11,139 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 14,483 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,770 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 53,610 |  |  |  |  |  |
Office Building [Member] | 2365 Northside Drive, Mission Valley, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 7,359 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,257 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 6,324 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 6,015 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,925 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 28,940 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,766 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 96,437 |  |  |  |  |  |
Office Building [Member] | 2375 Northside Drive, Mission Valley, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 3,947 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 8,146 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,386 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,213 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 11,266 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 14,479 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,688 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 51,516 |  |  |  |  |  |
Office Building [Member] | 2385 Northside Drive, Mission Valley, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,752 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 14,513 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 5,240 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,552 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 16,953 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,505 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,410 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 89,023 |  |  |  |  |  |
Office Building [Member] | 2305 Historic Decatur Road, San Diego, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 5,240 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 22,220 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 3,278 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,240 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 25,498 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 30,738 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,938 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 103,900 |  |  |  |  |  |
Office Building [Member] | 4939 Directors Place, Sorrento Mesa, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,225 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 12,698 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 4,359 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,198 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 17,084 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 19,282 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 8,975 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 60,662 |  |  |  |  |  |
Office Building [Member] | 4955 Directors Place, Sorrento Mesa, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,521 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 14,122 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 3,697 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,179 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 17,161 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 20,340 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 12,998 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 76,246 |  |  |  |  |  |
Office Building [Member] | 303 Second Street, San Francisco, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 128,315 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | 63,550 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 154,153 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 42,562 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 63,550 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 196,715 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 260,265 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 41,552 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 740,047 |  |  |  |  |  |
Office Building [Member] | 100 First Street, San Francisco, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 49,150 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 131,238 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 25,717 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 49,150 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 156,955 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 206,105 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 32,069 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 467,095 |  |  |  |  |  |
Office Building [Member] | 250 Brannan Street, San Francisco, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 7,630 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 22,770 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 4,324 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 7,630 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 27,094 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 34,724 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 6,001 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 95,008 |  |  |  |  |  |
Office Building [Member] | 201 Third Street, San Francisco, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 19,260 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 84,018 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 32,926 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 19,260 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 116,944 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 136,204 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 23,292 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 346,538 |  |  |  |  |  |
Office Building [Member] | 301 Brannan Street, San Francisco, California [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 5,910 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 22,450 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,843 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,910 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 24,293 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 30,203 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,066 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 74,430 |  |  |  |  |  |
Office Building [Member] | 360 Third St., San Francisco, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 88,235 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 111,085 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 28,504 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 170,816 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 199,320 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 17,936 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 429,796 |  |  |  |  |  |
Office Building [Member] | 1310 Chesapeake Terrace, Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 16,700 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 11,020 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 87 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 16,700 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 11,107 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 27,807 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 572 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 76,244 |  |  |  |  |  |
Office Building [Member] | 1315 Chesapeake Terrace, Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 12,260 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 7,930 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 235 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 12,260 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 8,165 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 20,425 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 534 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 55,635 |  |  |  |  |  |
Office Building [Member] | 1320-1324 Chesapeake Terrace, Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 17,360 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 10,720 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 91 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 17,360 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 10,811 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 28,171 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 723 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 79,720 |  |  |  |  |  |
Office Building [Member] | 1325-1327 Chesapeake Terrace, Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 12,610 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 8,160 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 63 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 12,610 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 8,223 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 20,833 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 551 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 55,383 |  |  |  |  |  |
Office Building [Member] | 505 Mathilda Ave., Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 37,843 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 1,163 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 50,847 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 37,943 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 51,910 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 89,853 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,966 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 212,322 |  |  |  |  |  |
Office Building [Member] | 555 Mathilda Ave., Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 37,843 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 1,163 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 50,560 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 37,943 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 51,623 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 89,566 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,966 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 212,322 |  |  |  |  |  |
Office Building [Member] | 605 Mathilda Ave., Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 29,014 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 891 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 76,844 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 29,090 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 77,659 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 106,749 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,354 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 162,785 |  |  |  |  |  |
Office Building [Member] | 599 N. Mathilda Avenue, Sunnyvale, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 13,538 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 12,559 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 58 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 13,538 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 12,617 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 26,155 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,778 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 75,810 |  |  |  |  |  |
Office Building [Member] | 601 108th Avenue, Bellevue, Washington [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 214,095 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 30,538 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 244,633 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 244,633 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 42,168 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 488,470 |  |  |  |  |  |
Office Building [Member] | NE 4th Street 10900 Bellevue, Washington [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 25,080 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 150,877 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 20,089 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 25,080 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 170,966 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 196,046 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 23,731 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 416,755 |  |  |  |  |  |
Office Building [Member] | 10210 NE Points Dr., Kirkland, Washington [Member] [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,336 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 24,187 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,659 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,336 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 26,846 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 31,182 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,022 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 84,641 |  |  |  |  |  |
Office Building [Member] | Pacific Center Court, Sorrento Mesa, California One [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 3,267 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 5,779 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 7,501 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,267 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 13,280 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 16,547 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,787 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 68,400 |  |  |  |  |  |
Office Building [Member] | Pacific Center Court, Sorrento Mesa, California Two [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,696 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 7,134 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | (781) |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,671 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 7,378 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 9,049 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,033 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 59,630 |  |  |  |  |  |
Office Building [Member] | Pacific Center Court, Sorrento Mesa, California Three [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 1,947 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 5,152 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,316 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,222 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 7,193 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 8,415 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,874 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 43,645 |  |  |  |  |  |
Office Building [Member] | Pacific Center Court, Sorrento Mesa, California Four [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,926 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 7,979 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 21,885 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,926 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 29,864 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 32,790 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 16,673 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 75,899 |  |  |  |  |  |
Office Building [Member] | Pacific Center Court, Sorrento Mesa, California Five [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,247 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 5,945 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,832 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 1,809 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 8,215 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 10,024 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,346 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 48,709 |  |  |  |  |  |
Office Building [Member] | Pacific Center Court, Sorrento Mesa, California Six [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,044 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 10,701 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | (2,250) |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 3,780 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 8,715 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 12,495 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,532 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 90,000 |  |  |  |  |  |
Office Building [Member] | Bohannon Drive 4100, Menlo Park, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,835 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,526 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 468 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,835 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 15,994 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 20,829 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,156 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 47,379 |  |  |  |  |  |
Office Building [Member] | Bohannon Drive 4200, Menlo Park, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,798 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,406 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,125 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,798 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 17,531 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,329 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,406 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 45,451 |  |  |  |  |  |
Office Building [Member] | Bohannon Drive 4300, Menlo Park, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 6,527 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 20,958 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,803 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 6,527 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 23,761 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 30,288 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,828 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 63,079 |  |  |  |  |  |
Office Building [Member] | Bohannon Drive 4400, Menlo Park, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,798 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,406 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,125 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,798 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 17,531 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,329 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,637 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 48,146 |  |  |  |  |  |
Office Building [Member] | Bohannon Drive 4500, Menlo Park, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 6,527 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 20,957 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,692 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 6,527 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,649 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 29,176 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,090 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 63,078 |  |  |  |  |  |
Office Building [Member] | Bohannon Drive 4600, Menlo Park, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 4,798 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,406 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,180 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 4,798 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 17,586 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 22,384 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,426 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 48,147 |  |  |  |  |  |
Office Building [Member] | Bohannon Drive 4700, Menlo Park, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 6,527 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 20,958 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,468 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 6,527 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 22,426 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 28,953 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,000 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 63,078 |  |  |  |  |  |
Office Building [Member] | Fairchild Drive, 331, Mountain View, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 18,396 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 17,712 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 7,887 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 18,396 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 25,599 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 43,995 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 1,972 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 87,147 |  |  |  |  |  |
Office Building [Member] | 680 E Middlefield Road, Mountain View, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 34,605 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 56,464 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 34,605 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 56,464 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 91,069 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,194 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 170,090 |  |  |  |  |  |
Office Building [Member] | 690 E Middlefield Road, Mountain View, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 34,755 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 56,707 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 34,755 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 56,707 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 91,462 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,203 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 170,823 |  |  |  |  |  |
Office Building [Member] | 900 Middlefield Road, Redwood City, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 7,959 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 46,065 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 8,626 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 45,398 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 54,024 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 277 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 113,790 |  |  |  |  |  |
Office Building [Member] | 900 Jefferson Ave., Redwood City, CA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 16,668 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 109,303 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 18,063 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 107,908 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 125,971 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 858 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 226,197 |  |  |  |  |  |
Office Building [Member] | NE Points Drive, Kirkland, Washington One [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,554 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 12,080 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,040 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,554 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 13,120 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 15,674 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 2,414 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 49,851 |  |  |  |  |  |
Office Building [Member] | NE Points Drive, Kirkland, Washington Two [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 5,071 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 24,694 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 3,671 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 5,070 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 28,366 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 33,436 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,189 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 98,982 |  |  |  |  |  |
Office Building [Member] | 3933 Lake WA Blvd. NE, Kirkland, WA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 2,380 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,114 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 3,428 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 2,380 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 18,542 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 20,922 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 3,450 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 46,450 |  |  |  |  |  |
Office Building [Member] | Fremont Lake View Seattle WA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 37,404 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 2,541 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 39,945 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 39,945 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 5,397 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 111,580 |  |  |  |  |  |
Office Building [Member] | Terry Avenue North, Washington Two [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 10,430 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 60,003 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 227 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 10,430 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 60,230 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 70,660 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 6,294 |  |  |  |  |  |
Net Rentable Area | ft² | 135,755 |  |  |  |  |  |
Office Building [Member] | 701 N. 34th St., Lake Union, WA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 48,027 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 1,393 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 49,420 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 49,420 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 7,717 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Life Used for Depreciation | 35 years |  |  |  |  |  |
Net Rentable Area | ft² | 138,995 |  |  |  |  |  |
Office Building [Member] | 401 Terry Avenue North, Lake Union, WA [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | $ 22,500 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 77,046 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 0 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 22,500 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 77,046 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 99,546 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 4,889 |  |  |  |  |  |
Net Rentable Area | ft² | 140,605 |  |  |  |  |  |
Undeveloped Land and CIP Properties [Member] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 1,810 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Land | 730,351 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 111 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements | 630,878 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land | 730,351 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements | 630,989 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements | 1,361,340 |  |  |  |  |  |
Real Estate and Accumulated Depreciation, Accumulated Depreciation | $ 0 |  |  |  |  |  |
Net Rentable Area | ft² | 0 |  |  |  |  |  |

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