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Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 347,255 | $ 335,404 |
Deferred revenue | 8,500 |  | $ 9,300
Deferred revenue, revenue recognized | 800 |  |
Deferred revenue balance from contracts with remaining performance obligations | 8,500 |  |
Rental Income [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 321,661 | 310,122 |
Other Property Leasing Revenue [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 23,286 | 23,046 |
Management And Other Fees From Affiliates Income [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 2,308 | 2,236 |
Rental And Other Property Revenues [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 344,947 | 333,168 |
Rental And Other Property Revenues [Member] | Same Property [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 322,385 | 312,024 |
Rental And Other Property Revenues [Member] | Acquisitions [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 10,383 | 8,186 |
Rental And Other Property Revenues [Member] | Development [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 19 | 0 |
Rental And Other Property Revenues [Member] | Redevelopment [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 5,024 | 4,814 |
Rental And Other Property Revenues [Member] | Non-Residential/Other, Net [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 7,136 | 8,144 |
Rental And Other Property Revenues [Member] | Other real estate assets [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 5,552 | 6,569 |
Rental And Other Property Revenues [Member] | Southern California [Member] | Operating Segments [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 152,060 | 147,099 |
Rental And Other Property Revenues [Member] | Northern California [Member] | Operating Segments [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | 128,622 | 123,308 |
Rental And Other Property Revenues [Member] | Seattle Metro [Member] | Operating Segments [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenues | $ 58,713 | $ 56,192 |
Minimum [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Lease term | 6 months |  |
Maximum [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Lease term | 12 months |  |

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