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Investment Banking/Investment Services Activity (Details) (USD $)
In Thousands
6 Months Ended
Jun. 30, 2011
Preferred stock of Sponsored REITs sold through private placements  
Gross Proceeds $ 50,075
FSP Monument Circle Corp.
 
Preferred stock of Sponsored REITs sold through private placements  
Gross Proceeds 4,750
FSP Union Centre Corp
 
Preferred stock of Sponsored REITs sold through private placements  
Gross Proceeds $ 45,325