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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Allowance for doubtful accounts - AR | $ 435 | $ 603
Deferred rent receivable | 125 | 373
Deferred leasing costs, accumulated amortization | $ 29,720 | $ 65,988
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 | 0 | 6,900,000
Preferred Shares of beneficial interest, shares outstanding | 0 | 6,900,000
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 Shares of beneficial interest, shares issued | 99,471,641 | 98,498,651
Common Shares of beneficial interest, shares outstanding | 99,471,641 | 98,498,651
Redeemable Preferred Stock Liability Portion |  |
Redeemable preferred units of general partner outstanding, in units | 0 | 531,667
Preferred Shares of beneficial interest, par value (in dollars per share) | $ 0.01 | $ 0.01
Corporate Office Properties, L.P. |  |
Allowance for doubtful accounts - AR | $ 435 | $ 603
Deferred rent receivable | 125 | 373
Deferred leasing costs, accumulated amortization | $ 29,720 | $ 65,988
Corporate Office Properties, L.P. | Redeemable Preferred Stock Liability Portion |  |
Redeemable preferred units of general partner outstanding, in units | 0 | 531,667
Corporate Office Properties, L.P. | General Partner |  |
Common Shares of beneficial interest, shares outstanding | 99,471,641 | 98,498,651
Preferred Units, Outstanding | 0 | 6,900,000
Corporate Office Properties, L.P. | Limited Partner |  |
Common Shares of beneficial interest, shares outstanding | 3,403,391 | 3,590,391
Preferred Units, Outstanding | 352,000 | 352,000

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