Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.10.0.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Allowance for doubtful accounts- AR $ 830 $ 607
Allowance for deferred rent receivable 264 364
Accumulated amortization of deferred leasing costs $ 31,994 $ 29,560
Common Shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Common Shares of beneficial interest, shares authorized 150,000,000 150,000,000
Common Shares of beneficial interest, shares issued 110,241,868 101,292,299
Common Shares of beneficial interest, shares outstanding 110,241,868 101,292,299
Corporate Office Properties, L.P. [Member]    
Allowance for doubtful accounts- AR $ 830 $ 607
Allowance for deferred rent receivable 264 364
Accumulated amortization of deferred leasing costs $ 31,994 $ 29,560
General Partner [Member] | Corporate Office Properties, L.P. [Member]    
Common Shares of beneficial interest, shares outstanding 110,241,868 101,292,299
Limited Partner [Member] | Corporate Office Properties, L.P. [Member]    
Preferred Units, Outstanding 352,000 352,000
Common Shares of beneficial interest, shares outstanding 1,332,886 3,250,878