Properties, Net (Details 5) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended |
|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2015 |
|
| Real Estate [Abstract] | ||
| Pro forma total revenues | $ 175,996 | $ 345,921 |
| Pro forma net income attributable to COPT common shareholders | $ 13,259 | $ 24,106 |
| Pro Forma EPS, Basic (in dollars per share) | $ 0.14 | $ 0.25 |
| Pro Forma EPS, Diluted (in dollars per share) | $ 0.14 | $ 0.25 |
| X | ||||||||||
- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|