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Investment in Real Estate (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012 M | Mar. 31, 2011 M
In-Place Leases [Member] |  |
Summary of intangible assets subject to amortization in the period of acquisition |  |
Acquired finite lived intangible asset, fair value | $ 1,750 |
Acquired finite lived intangible asset, weighted average life | 118 |
Tenant Relationships [Member] |  |
Summary of intangible assets subject to amortization in the period of acquisition |  |
Acquired finite lived intangible asset, fair value | 1,012 |
Acquired finite lived intangible asset, weighted average life | 178 |
Below Market Leases [Member] |  |
Summary of intangible assets subject to amortization in the period of acquisition |  |
Acquired finite lived intangible asset, fair value | $ (102) |
Acquired finite lived intangible asset, weighted average life | 118 |

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