Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860546-16-000100-index-headers.html | 2016-11-04 17:07:36 | |
| 0000860546-16-000100-index.html | 2016-11-04 17:07:36 | |
| 0000860546-16-000100.txt | 2016-11-04 17:07:36 | |
 0000860546-16-000100-xbrl.zip | 364426 | 2016-11-04 17:07:36 |
| copt09302016ex102.htm | 43563 | 2016-11-04 17:07:36 |
| copt09302016ex121.htm | 29048 | 2016-11-04 17:07:36 |
| copt09302016ex122.htm | 23607 | 2016-11-04 17:07:36 |
| copt09302016ex311.htm | 13364 | 2016-11-04 17:07:36 |
| copt09302016ex312.htm | 13262 | 2016-11-04 17:07:36 |
| copt09302016ex313.htm | 14690 | 2016-11-04 17:07:36 |
| copt09302016ex314.htm | 13604 | 2016-11-04 17:07:36 |
| copt09302016ex321.htm | 5890 | 2016-11-04 17:07:36 |
| copt09302016ex322.htm | 5768 | 2016-11-04 17:07:36 |
| copt09302016ex323.htm | 6176 | 2016-11-04 17:07:36 |
| copt09302016ex324.htm | 6138 | 2016-11-04 17:07:36 |
| copt10q09302016document.htm | 2944157 | 2016-11-04 17:07:36 |
| FilingSummary.xml | 38469 | 2016-11-04 17:07:36 |
| Financial_Report.xlsx | 104196 | 2016-11-04 17:07:36 |
| ofc-20160930.xml | 3432284 | 2016-11-04 17:07:36 |
| ofc-20160930.xsd | 85672 | 2016-11-04 17:07:36 |
| ofc-20160930_cal.xml | 130443 | 2016-11-04 17:07:36 |
| ofc-20160930_def.xml | 505644 | 2016-11-04 17:07:36 |
| ofc-20160930_lab.xml | 1066309 | 2016-11-04 17:07:36 |
| ofc-20160930_pre.xml | 605710 | 2016-11-04 17:07:36 |
| R1.htm | 25027 | 2016-11-04 17:07:36 |
| R10.htm | 16774 | 2016-11-04 17:07:36 |
| R11.htm | 113058 | 2016-11-04 17:07:36 |
| R12.htm | 102987 | 2016-11-04 17:07:36 |
| R13.htm | 41621 | 2016-11-04 17:07:36 |
| R14.htm | 14862 | 2016-11-04 17:07:36 |
| R15.htm | 20351 | 2016-11-04 17:07:36 |
| R16.htm | 93111 | 2016-11-04 17:07:36 |
| R17.htm | 86963 | 2016-11-04 17:07:36 |
| R18.htm | 21895 | 2016-11-04 17:07:36 |
| R19.htm | 10364 | 2016-11-04 17:07:36 |
| R2.htm | 114603 | 2016-11-04 17:07:36 |
| R20.htm | 445830 | 2016-11-04 17:07:36 |
| R21.htm | 26001 | 2016-11-04 17:07:36 |
| R22.htm | 251087 | 2016-11-04 17:07:36 |
| R23.htm | 24669 | 2016-11-04 17:07:36 |
| R24.htm | 17802 | 2016-11-04 17:07:36 |
| R25.htm | 94359 | 2016-11-04 17:07:36 |
| R26.htm | 90899 | 2016-11-04 17:07:36 |
| R27.htm | 37753 | 2016-11-04 17:07:36 |
| R28.htm | 12306 | 2016-11-04 17:07:36 |
| R29.htm | 20086 | 2016-11-04 17:07:36 |
| R3.htm | 34284 | 2016-11-04 17:07:36 |
| R30.htm | 90992 | 2016-11-04 17:07:36 |
| R31.htm | 86249 | 2016-11-04 17:07:36 |
| R32.htm | 19662 | 2016-11-04 17:07:36 |
| R33.htm | 449604 | 2016-11-04 17:07:36 |
| R34.htm | 9488 | 2016-11-04 17:07:36 |
| R35.htm | 240153 | 2016-11-04 17:07:36 |
| R36.htm | 14440 | 2016-11-04 17:07:36 |
| R37.htm | 26597 | 2016-11-04 17:07:36 |
| R38.htm | 8888 | 2016-11-04 17:07:36 |
| R39.htm | 8922 | 2016-11-04 17:07:36 |
| R4.htm | 152188 | 2016-11-04 17:07:36 |
| R40.htm | 30950 | 2016-11-04 17:07:36 |
| R41.htm | 55761 | 2016-11-04 17:07:36 |
| R42.htm | 24030 | 2016-11-04 17:07:36 |
| R43.htm | 12619 | 2016-11-04 17:07:36 |
| R44.htm | 10213 | 2016-11-04 17:07:36 |
| R45.htm | 31178 | 2016-11-04 17:07:36 |
| R46.htm | 33286 | 2016-11-04 17:07:36 |
| R47.htm | 10637 | 2016-11-04 17:07:36 |
| R48.htm | 68440 | 2016-11-04 17:07:36 |
| R49.htm | 49313 | 2016-11-04 17:07:36 |
| R5.htm | 30700 | 2016-11-04 17:07:36 |
| R50.htm | 12868 | 2016-11-04 17:07:36 |
| R51.htm | 26181 | 2016-11-04 17:07:36 |
| R52.htm | 89374 | 2016-11-04 17:07:36 |
| R53.htm | 17946 | 2016-11-04 17:07:36 |
| R54.htm | 70253 | 2016-11-04 17:07:36 |
| R55.htm | 18344 | 2016-11-04 17:07:36 |
| R56.htm | 9762 | 2016-11-04 17:07:36 |
| R57.htm | 72514 | 2016-11-04 17:07:36 |
| R58.htm | 35602 | 2016-11-04 17:07:36 |
| R59.htm | 35083 | 2016-11-04 17:07:36 |
| R6.htm | 88305 | 2016-11-04 17:07:36 |
| R60.htm | 11746 | 2016-11-04 17:07:36 |
| R61.htm | 64776 | 2016-11-04 17:07:36 |
| R62.htm | 103364 | 2016-11-04 17:07:36 |
| R63.htm | 27524 | 2016-11-04 17:07:36 |
| R64.htm | 25943 | 2016-11-04 17:07:36 |
| R65.htm | 18844 | 2016-11-04 17:07:36 |
| R7.htm | 16441 | 2016-11-04 17:07:36 |
| R8.htm | 189844 | 2016-11-04 17:07:36 |
| R9.htm | 14745 | 2016-11-04 17:07:36 |
| report.css | 2767 | 2016-11-04 17:07:36 |
| Show.js | 1410 | 2016-11-04 17:07:36 |