Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000860546-17-000006-index-headers.html | 2017-02-17 16:45:10 | |
| 0000860546-17-000006-index.html | 2017-02-17 16:45:10 | |
| 0000860546-17-000006.txt | 2017-02-17 16:45:10 | |
 0000860546-17-000006-xbrl.zip | 674170 | 2017-02-17 16:45:10 |
| copt10kdoc123116.htm | 6280001 | 2017-02-17 16:45:10 |
 copt10kdoc_chart-53233.jpg | 69273 | 2017-02-17 16:45:10 |
| copt12312013ex1015.htm | 120164 | 2017-02-17 16:45:10 |
| copt12312016ex1013.htm | 120223 | 2017-02-17 16:45:10 |
| copt12312016ex1014.htm | 120208 | 2017-02-17 16:45:10 |
| copt12312016ex1043.htm | 11472 | 2017-02-17 16:45:10 |
| copt12312016ex121.htm | 106046 | 2017-02-17 16:45:10 |
| copt12312016ex122.htm | 86629 | 2017-02-17 16:45:10 |
| copt12312016ex211.htm | 326944 | 2017-02-17 16:45:10 |
| copt12312016ex212.htm | 324831 | 2017-02-17 16:45:10 |
| copt12312016ex231.htm | 2898 | 2017-02-17 16:45:10 |
| copt12312016ex232.htm | 2670 | 2017-02-17 16:45:10 |
| copt12312016ex311.htm | 13363 | 2017-02-17 16:45:10 |
| copt12312016ex312.htm | 13261 | 2017-02-17 16:45:10 |
| copt12312016ex313.htm | 14689 | 2017-02-17 16:45:10 |
| copt12312016ex314.htm | 13603 | 2017-02-17 16:45:10 |
| copt12312016ex321.htm | 5885 | 2017-02-17 16:45:10 |
| copt12312016ex322.htm | 5762 | 2017-02-17 16:45:10 |
| copt12312016ex323.htm | 6170 | 2017-02-17 16:45:10 |
| copt12312016ex324.htm | 6132 | 2017-02-17 16:45:10 |
| FilingSummary.xml | 52079 | 2017-02-17 16:45:10 |
| Financial_Report.xlsx | 202640 | 2017-02-17 16:45:10 |
 image0a02.jpg | 3929 | 2017-02-17 16:45:10 |
 image0a03.jpg | 3929 | 2017-02-17 16:45:10 |
 image0a04.jpg | 3929 | 2017-02-17 16:45:10 |
| ofc-20161231.xml | 7114790 | 2017-02-17 16:45:10 |
| ofc-20161231.xsd | 171216 | 2017-02-17 16:45:10 |
| ofc-20161231_cal.xml | 165803 | 2017-02-17 16:45:10 |
| ofc-20161231_def.xml | 937696 | 2017-02-17 16:45:10 |
| ofc-20161231_lab.xml | 1889327 | 2017-02-17 16:45:10 |
| ofc-20161231_pre.xml | 1103322 | 2017-02-17 16:45:10 |
| R1.htm | 34967 | 2017-02-17 16:45:10 |
| R10.htm | 117719 | 2017-02-17 16:45:10 |
| R11.htm | 210942 | 2017-02-17 16:45:10 |
| R12.htm | 8579 | 2017-02-17 16:45:10 |
| R13.htm | 216720 | 2017-02-17 16:45:10 |
| R14.htm | 52357 | 2017-02-17 16:45:10 |
| R15.htm | 47574 | 2017-02-17 16:45:10 |
| R16.htm | 17426 | 2017-02-17 16:45:10 |
| R17.htm | 36453 | 2017-02-17 16:45:10 |
| R18.htm | 120400 | 2017-02-17 16:45:10 |
| R19.htm | 88930 | 2017-02-17 16:45:10 |
| R2.htm | 118047 | 2017-02-17 16:45:10 |
| R20.htm | 26920 | 2017-02-17 16:45:10 |
| R21.htm | 42034 | 2017-02-17 16:45:10 |
| R22.htm | 79856 | 2017-02-17 16:45:10 |
| R23.htm | 148160 | 2017-02-17 16:45:10 |
| R24.htm | 15548 | 2017-02-17 16:45:10 |
| R25.htm | 367598 | 2017-02-17 16:45:10 |
| R26.htm | 179139 | 2017-02-17 16:45:10 |
| R27.htm | 24425 | 2017-02-17 16:45:10 |
| R28.htm | 204926 | 2017-02-17 16:45:10 |
| R29.htm | 65036 | 2017-02-17 16:45:10 |
| R3.htm | 26258 | 2017-02-17 16:45:10 |
| R30.htm | 1040139 | 2017-02-17 16:45:10 |
| R31.htm | 136031 | 2017-02-17 16:45:10 |
| R32.htm | 41702 | 2017-02-17 16:45:10 |
| R33.htm | 181437 | 2017-02-17 16:45:10 |
| R34.htm | 203028 | 2017-02-17 16:45:10 |
| R35.htm | 35185 | 2017-02-17 16:45:10 |
| R36.htm | 43443 | 2017-02-17 16:45:10 |
| R37.htm | 14208 | 2017-02-17 16:45:10 |
| R38.htm | 37050 | 2017-02-17 16:45:10 |
| R39.htm | 97291 | 2017-02-17 16:45:10 |
| R4.htm | 127902 | 2017-02-17 16:45:10 |
| R40.htm | 87997 | 2017-02-17 16:45:10 |
| R41.htm | 25809 | 2017-02-17 16:45:10 |
| R42.htm | 30043 | 2017-02-17 16:45:10 |
| R43.htm | 54369 | 2017-02-17 16:45:10 |
| R44.htm | 132597 | 2017-02-17 16:45:10 |
| R45.htm | 14047 | 2017-02-17 16:45:10 |
| R46.htm | 371438 | 2017-02-17 16:45:10 |
| R47.htm | 169073 | 2017-02-17 16:45:10 |
| R48.htm | 16170 | 2017-02-17 16:45:10 |
| R49.htm | 206115 | 2017-02-17 16:45:10 |
| R5.htm | 36186 | 2017-02-17 16:45:10 |
| R50.htm | 28434 | 2017-02-17 16:45:10 |
| R51.htm | 9221 | 2017-02-17 16:45:10 |
| R52.htm | 22094 | 2017-02-17 16:45:10 |
| R53.htm | 11660 | 2017-02-17 16:45:10 |
| R54.htm | 31345 | 2017-02-17 16:45:10 |
| R55.htm | 11637 | 2017-02-17 16:45:10 |
| R56.htm | 39817 | 2017-02-17 16:45:10 |
| R57.htm | 70022 | 2017-02-17 16:45:10 |
| R58.htm | 21984 | 2017-02-17 16:45:10 |
| R59.htm | 13362 | 2017-02-17 16:45:10 |
| R6.htm | 121540 | 2017-02-17 16:45:10 |
| R60.htm | 16191 | 2017-02-17 16:45:10 |
| R61.htm | 10248 | 2017-02-17 16:45:10 |
| R62.htm | 33876 | 2017-02-17 16:45:10 |
| R63.htm | 77649 | 2017-02-17 16:45:10 |
| R64.htm | 82061 | 2017-02-17 16:45:10 |
| R65.htm | 80425 | 2017-02-17 16:45:10 |
| R66.htm | 96965 | 2017-02-17 16:45:10 |
| R67.htm | 44553 | 2017-02-17 16:45:10 |
| R68.htm | 14703 | 2017-02-17 16:45:10 |
| R69.htm | 24767 | 2017-02-17 16:45:10 |
| R7.htm | 24660 | 2017-02-17 16:45:10 |
| R70.htm | 17408 | 2017-02-17 16:45:10 |
| R71.htm | 67421 | 2017-02-17 16:45:10 |
| R72.htm | 24627 | 2017-02-17 16:45:10 |
| R73.htm | 17388 | 2017-02-17 16:45:10 |
| R74.htm | 154640 | 2017-02-17 16:45:10 |
| R75.htm | 70516 | 2017-02-17 16:45:10 |
| R76.htm | 15618 | 2017-02-17 16:45:10 |
| R77.htm | 82427 | 2017-02-17 16:45:10 |
| R78.htm | 100395 | 2017-02-17 16:45:10 |
| R79.htm | 12573 | 2017-02-17 16:45:10 |
| R8.htm | 208962 | 2017-02-17 16:45:10 |
| R80.htm | 30423 | 2017-02-17 16:45:10 |
| R81.htm | 45202 | 2017-02-17 16:45:10 |
| R82.htm | 23289 | 2017-02-17 16:45:10 |
| R83.htm | 13423 | 2017-02-17 16:45:10 |
| R84.htm | 79488 | 2017-02-17 16:45:10 |
| R85.htm | 16036 | 2017-02-17 16:45:10 |
| R86.htm | 63895 | 2017-02-17 16:45:10 |
| R87.htm | 73180 | 2017-02-17 16:45:10 |
| R88.htm | 11734 | 2017-02-17 16:45:10 |
| R89.htm | 106742 | 2017-02-17 16:45:10 |
| R9.htm | 14606 | 2017-02-17 16:45:10 |
| R90.htm | 25406 | 2017-02-17 16:45:10 |
| R91.htm | 46210 | 2017-02-17 16:45:10 |
| R92.htm | 55546 | 2017-02-17 16:45:10 |
| R93.htm | 21239 | 2017-02-17 16:45:10 |
| R94.htm | 1115193 | 2017-02-17 16:45:10 |
| R95.htm | 28946 | 2017-02-17 16:45:10 |
| report.css | 2768 | 2017-02-17 16:45:10 |
| Show.js | 1411 | 2017-02-17 16:45:10 |