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Investment in Real Estate - Summary of Property Sold (Details) |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 21, 2017 USD ($) ft² | Feb. 14, 2017 USD ($) ft² | Jun. 30, 2017 USD ($) property | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) ft² property | Jun. 30, 2016 USD ($) | Dec. 31, 2016 property
Real Estate [Line Items] |  |  |  |  |  |  |
Area of real estate property (in square feet) | ft² |  |  |  |  | 199,484 |  |
Sales Price |  |  |  |  | $ 86,800,000 |  |
Gains on sale of real estate |  |  | $ 0 | $ 2,163,000 | $ 16,866,000 | $ 8,515,000 |
Number of properties held for sale (in properties) | property |  |  | 0 |  | 0 |  | 2
Long-lived asset impairment charges |  |  |  |  | $ 0 |  |
222 Kearny Street |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |
Area of real estate property (in square feet) | ft² |  | 148,797 |  |  |  |  |
Sales Price |  | $ 51,800,000 |  |  |  |  |
3402 Pico Boulevard |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |
Area of real estate property (in square feet) | ft² | 50,687 |  |  |  |  |  |
Sales Price | $ 35,000,000 |  |  |  |  |  |

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- Definition Asset Disposition, Sales Price + References No definition available. + Details
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- Definition Number of Real Estate Properties Held for Sale + References No definition available. + Details
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition This element represents the amount of gain (loss) on sale of properties during the reporting period net of the applicable income taxes realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 974 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-15.(a)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=6875705&loc=d3e641549-123027 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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