Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860546-19-000030-index-headers.html | 2019-11-01 15:53:31 | |
| 0000860546-19-000030-index.html | 2019-11-01 15:53:31 | |
| 0000860546-19-000030.txt | 2019-11-01 15:53:31 | |
 0000860546-19-000030-xbrl.zip | 451565 | 2019-11-01 15:53:31 |
| copt09302019ex311.htm | 13520 | 2019-11-01 15:53:31 |
| copt09302019ex312.htm | 13498 | 2019-11-01 15:53:31 |
| copt09302019ex313.htm | 14795 | 2019-11-01 15:53:31 |
| copt09302019ex314.htm | 13840 | 2019-11-01 15:53:31 |
| copt09302019ex321.htm | 6164 | 2019-11-01 15:53:31 |
| copt09302019ex322.htm | 6121 | 2019-11-01 15:53:31 |
| copt09302019ex323.htm | 6398 | 2019-11-01 15:53:31 |
| copt09302019ex324.htm | 6491 | 2019-11-01 15:53:31 |
| copt10qdoc09302019.htm | 4051418 | 2019-11-01 15:53:31 |
| copt10qdoc09302019_htm.xml | 3597620 | 2019-11-01 15:53:31 |
| FilingSummary.xml | 45568 | 2019-11-01 15:53:31 |
| Financial_Report.xlsx | 115644 | 2019-11-01 15:53:31 |
| MetaLinks.json | 865788 | 2019-11-01 15:53:31 |
| ofc-20190930.xsd | 88898 | 2019-11-01 15:53:31 |
| ofc-20190930_cal.xml | 162556 | 2019-11-01 15:53:31 |
| ofc-20190930_def.xml | 577518 | 2019-11-01 15:53:31 |
| ofc-20190930_lab.xml | 1164366 | 2019-11-01 15:53:31 |
| ofc-20190930_pre.xml | 693863 | 2019-11-01 15:53:31 |
| R1.htm | 60559 | 2019-11-01 15:53:31 |
| R10.htm | 23840 | 2019-11-01 15:53:31 |
| R11.htm | 69502 | 2019-11-01 15:53:31 |
| R12.htm | 23427 | 2019-11-01 15:53:31 |
| R13.htm | 145786 | 2019-11-01 15:53:31 |
| R14.htm | 48882 | 2019-11-01 15:53:31 |
| R15.htm | 13893 | 2019-11-01 15:53:31 |
| R16.htm | 26403 | 2019-11-01 15:53:31 |
| R17.htm | 82942 | 2019-11-01 15:53:31 |
| R18.htm | 80810 | 2019-11-01 15:53:31 |
| R19.htm | 20069 | 2019-11-01 15:53:31 |
| R2.htm | 118389 | 2019-11-01 15:53:31 |
| R20.htm | 12659 | 2019-11-01 15:53:31 |
| R21.htm | 382842 | 2019-11-01 15:53:31 |
| R22.htm | 73204 | 2019-11-01 15:53:31 |
| R23.htm | 23294 | 2019-11-01 15:53:31 |
| R24.htm | 145189 | 2019-11-01 15:53:31 |
| R25.htm | 12330 | 2019-11-01 15:53:31 |
| R26.htm | 26594 | 2019-11-01 15:53:31 |
| R27.htm | 60845 | 2019-11-01 15:53:31 |
| R28.htm | 18879 | 2019-11-01 15:53:31 |
| R29.htm | 139329 | 2019-11-01 15:53:31 |
| R3.htm | 19029 | 2019-11-01 15:53:31 |
| R30.htm | 48321 | 2019-11-01 15:53:31 |
| R31.htm | 11463 | 2019-11-01 15:53:31 |
| R32.htm | 26396 | 2019-11-01 15:53:31 |
| R33.htm | 81037 | 2019-11-01 15:53:31 |
| R34.htm | 85136 | 2019-11-01 15:53:31 |
| R35.htm | 18257 | 2019-11-01 15:53:31 |
| R36.htm | 389467 | 2019-11-01 15:53:31 |
| R37.htm | 71097 | 2019-11-01 15:53:31 |
| R38.htm | 8822 | 2019-11-01 15:53:31 |
| R39.htm | 132731 | 2019-11-01 15:53:31 |
| R4.htm | 96526 | 2019-11-01 15:53:31 |
| R40.htm | 33320 | 2019-11-01 15:53:31 |
| R41.htm | 6949 | 2019-11-01 15:53:31 |
| R42.htm | 15301 | 2019-11-01 15:53:31 |
| R43.htm | 17659 | 2019-11-01 15:53:31 |
| R44.htm | 47461 | 2019-11-01 15:53:31 |
| R45.htm | 14433 | 2019-11-01 15:53:31 |
| R46.htm | 18159 | 2019-11-01 15:53:31 |
| R47.htm | 21926 | 2019-11-01 15:53:31 |
| R48.htm | 18320 | 2019-11-01 15:53:31 |
| R49.htm | 12959 | 2019-11-01 15:53:31 |
| R5.htm | 30764 | 2019-11-01 15:53:31 |
| R50.htm | 40624 | 2019-11-01 15:53:31 |
| R51.htm | 34524 | 2019-11-01 15:53:31 |
| R52.htm | 23265 | 2019-11-01 15:53:31 |
| R53.htm | 11254 | 2019-11-01 15:53:31 |
| R54.htm | 17982 | 2019-11-01 15:53:31 |
| R55.htm | 9074 | 2019-11-01 15:53:31 |
| R56.htm | 93054 | 2019-11-01 15:53:31 |
| R57.htm | 36497 | 2019-11-01 15:53:31 |
| R58.htm | 17174 | 2019-11-01 15:53:31 |
| R59.htm | 17090 | 2019-11-01 15:53:31 |
| R6.htm | 147956 | 2019-11-01 15:53:31 |
| R60.htm | 41723 | 2019-11-01 15:53:31 |
| R61.htm | 90467 | 2019-11-01 15:53:31 |
| R62.htm | 17835 | 2019-11-01 15:53:31 |
| R63.htm | 71872 | 2019-11-01 15:53:31 |
| R64.htm | 18501 | 2019-11-01 15:53:31 |
| R65.htm | 39273 | 2019-11-01 15:53:31 |
| R66.htm | 89006 | 2019-11-01 15:53:31 |
| R67.htm | 30887 | 2019-11-01 15:53:31 |
| R68.htm | 39106 | 2019-11-01 15:53:31 |
| R69.htm | 14316 | 2019-11-01 15:53:31 |
| R7.htm | 17665 | 2019-11-01 15:53:31 |
| R70.htm | 10045 | 2019-11-01 15:53:31 |
| R71.htm | 21902 | 2019-11-01 15:53:31 |
| R72.htm | 20946 | 2019-11-01 15:53:31 |
| R73.htm | 71322 | 2019-11-01 15:53:31 |
| R74.htm | 57406 | 2019-11-01 15:53:31 |
| R75.htm | 32731 | 2019-11-01 15:53:31 |
| R76.htm | 22966 | 2019-11-01 15:53:31 |
| R8.htm | 165717 | 2019-11-01 15:53:31 |
| R9.htm | 14512 | 2019-11-01 15:53:31 |
| report.css | 2767 | 2019-11-01 15:53:31 |
| Show.js | 1085 | 2019-11-01 15:53:31 |