Annual report pursuant to Section 13 and 15(d)

Investments In Unconsolidated Joint Ventures (Capitol Place Mezz LLC) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (Capitol Place Mezz LLC) (Narrative) (Details) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
item
Dec. 31, 2012
Dec. 31, 2013
Capitol Place Mezz LLC [Member]
Dec. 23, 2013
Capitol Place Mezz LLC [Member]
Dec. 31, 2013
Capitol Place Mezz LLC [Member]
FB Capitol Place LLC [Member]
Dec. 31, 2013
WDC Project [Member]
Dec. 23, 2013
WDC Project [Member]
item
sqft
Dec. 31, 2013
WDC Project [Member]
Construction Loan [Member]
Schedule of Equity Method Investments [Line Items]                
Percentage of interest in venture       50.00%        
Number of units             377  
Area of property (in square feet)             25,000  
Number of parking spaces 850           309  
Investments in unconsolidated joint ventures $ 181,129,000 $ 132,339,000 $ 46,628,000 $ 46,500,000        
Total project costs           120,700,000    
Costs of the project incurred           38,500,000    
Threshold of member unreturned capital for distribution of capital event flows         2,500,000      
Mortgage loan, maturity period               20 years
Maximum borrowing capacity               100,700,000
Amount outstanding               $ 24,600,000
Interest rate               4.82%
Loan maturity date               Jul. 01, 2033
Amortization schedule           30 years    
Holding and distribution pattern under operating agreement     In general, the operating agreement of Capitol provides that net cash flows from a capital event are distributed first, to each holder of a member loan, as defined, until all member loans have been paid in full; second, to FB until FB has received the aggregate amount of $2,500,000; and third, to the members in accordance with their percentage interests. The operating agreement also includes specific provisions, including a right of first offer on all development deals in the D.C. metro area that involve either party, with specific qualifications on any properties in Arlington County, Virginia.