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Equity | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Equity | Equity During the six months ended June 30, 2018, COPT issued 1.8 million common shares under its forward equity sale agreements for net proceeds of $52.3 million. COPT contributed the net proceeds from these issuances to COPLP in exchange for an equal number of units in COPLP. COPT’s remaining capacity under the forward equity sale agreements was 5.7 million common shares as of June 30, 2018. During the six months ended June 30, 2018, certain COPLP limited partners converted 53,817 common units in COPLP for an equal number of common shares in COPT. As of June 30, 2018, COPT had remaining capacity under its at-the-market stock offering program equal to an aggregate gross sales price of $70.0 million in common share sales. See Note 14 for disclosure of COPT common share and COPLP common unit activity pertaining to our share-based compensation plans.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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