Investments In Unconsolidated Joint Ventures (Red Bank Corporate Plaza, L.L.C.) (Narrative) (Details) (Red Bank Corporate Plaza, L.L.C. [Member], USD $)
12 Months Ended
Dec. 31, 2013
sqft
Dec. 31, 2012
Dec. 31, 2011
Red Bank Corporate Plaza, L.L.C. [Member]
     
Schedule of Equity Method Investments [Line Items]      
Area of property (in square feet) 92,878    
Lease expiration date Sep. 30, 2017    
Percentage of interest in venture 50.00%    
Mortgage loans, carrying amount $ 16,600,000    
Spread over LIBOR 3.00%    
Mortgage loan, maturity date May 2016    
LIBOR interest rate 0.17%    
Fixed interest rate 3.99375%    
Initial notional amount 13,650,000    
Management, leasing and other services fees $ 104,000 $ 99,000 $ 100,000