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Related Party Transaction (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Pacific Oaks Plaza [Member] | Chairman and Chief Executive Officer [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Rent revenue from entities 100% owned by the Company’s Chairman and Chief Executive Officer | $ 7,000 | $ 7,000 | $ 14,000 | $ 14,000

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