Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Allowance for doubtful accounts - AR $ 750 $ 2,976
Allowance - Deferred rent receivable 1,426 2,126
Preferred Shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Preferred Shares of beneficial interest, shares authorized 25,000,000 25,000,000
Preferred Shares of beneficial interest, shares issued 7,431,667 9,431,667
Preferred Shares of beneficial interest, shares outstanding 7,431,667 9,431,667
Common Shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Common Shares of beneficial interest, shares authorized 125,000,000 125,000,000
Common Stock, Shares, Issued 87,711,731 87,394,512
Common Shares of beneficial interest, shares outstanding 87,711,731 87,394,512
Corporate Office Properties, L.P.
    
Allowance for doubtful accounts - AR 750 2,976
Allowance - Deferred rent receivable $ 1,426 $ 2,126
Corporate Office Properties, L.P. | General Partner
    
Common Shares of beneficial interest, shares outstanding 87,711,731 87,394,512
Preferred Units, Outstanding 7,431,667 9,431,667
Corporate Office Properties, L.P. | Limited Partner
    
Common Shares of beneficial interest, shares outstanding 3,860,551 3,977,700
Preferred Units, Outstanding 352,000 352,000