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Subsequent Events (Details) (USD $) | 3 Months Ended |  | 0 Months Ended |  | 0 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 31, 2013 sqft | Mar. 31, 2012 sqft | Mar. 31, 2013 FSP 385 Interlocken Development Corp. Secured construction loan | Apr. 03, 2013 Subsequent event Office property in Denver, Colorado sqft | Apr. 26, 2013 Subsequent event FSP 385 Interlocken Development Corp. Secured construction loan | Apr. 12, 2013 Cash distribution declared Subsequent event
Subsequent events |  |  |  |  |  |
Area of property (in square feet) | 7,856,859 | 7,052,068 |  | 680,277 |  |
Purchase price of property acquired in Denver, Colorado |  |  |  | $ 183,000,000 |  |
Minimum number of business days in which advance notice has to be provided |  |  |  | 7 days |  |
Cash dividend declared per share (in dollars per share) | $ 0.19 | $ 0.19 |  |  |  | $ 0.19
Maximum amount of loan | $ 118,800,000 |  | $ 42,000,000 |  | $ 42,000,000 |

X
- Definition Reflects the maximum amount of loan due from related parties at the balance sheet date. + References No definition available. + Details
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- Definition Represents the minimum number of business days in which advance notice has to be provided by the entity to the seller in order to accelerate the closing date of the purchased property. + References No definition available. + Details
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- Definition Represents the aggregate purchase price excluding closing costs and adjustments of real estate properties acquired by the entity during the period. + References No definition available. + Details
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- Definition Area of a real estate property. + References No definition available. + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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- Details
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