Quarterly report pursuant to Section 13 or 15(d)

Fair Value Disclosures (Financial Assets and Liabilities Not Measured at Fair Value) (Details)

 v2.3.0.11
Fair Value Disclosures (Financial Assets and Liabilities Not Measured at Fair Value) (Details) (USD $)
In Thousands
Jun. 30, 2011
Dec. 31, 2010
Jun. 30, 2010
Dec. 31, 2009
Cash and cash equivalents, Carrying Value $ 42,886 $ 78,767 [1] $ 13,338 $ 11,203
Restricted cash, Carrying Value 23,550 21,552 [1]    
Mortgage notes payable 378,469 380,171 [1]    
Lines of credit payable, Carrying Value 245,000 100,000 [1]    
Notes payable, Carrying Value 659,934 753,587 [1]    
Cash and cash equivalents, Fair Value 42,886 78,767    
Restricted cash, Fair Value 23,550 21,552    
Mortgage notes payable, Fair Value 405,771 399,282    
Lines of credit payable, Fair Value 245,000 100,000    
Notes Payable, Fair Value Disclosure 701,549 785,637    
2445 M Street Note Receivable [Member]
       
2445 M Street note receivable, Carrying Value 6,716 7,090    
2445 M Street note receivable, Fair Value $ 7,895 $ 8,048    
[1] As adjusted (see note 3 to the consolidated financial statements)