Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Secured Debt (Details)

v2.4.0.8
Real Estate - Secured Debt (Details) (USD $)
9 Months Ended 0 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2013
650 N Glebe [Member]
extension_option
Feb. 21, 2013
650 N Glebe [Member]
Feb. 21, 2013
650 N Glebe [Member]
Secured Debt [Member]
LIBOR [Member]
Maximum [Member]
Feb. 21, 2013
650 N Glebe [Member]
Secured Debt [Member]
LIBOR [Member]
Minimum [Member]
Debt Instrument [Line Items]            
Construction loan agreement       $ 33,000,000    
Basis spread on variable interest rate         2.15% 2.00%
Mortgage notes payable $ 290,838,000 $ 319,025,000 $ 3,000,000      
Number of extension options     2      
Length of extension period     1 year