Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000858470-18-000006-index-headers.html | 2018-02-28 17:49:51 | |
| 0000858470-18-000006-index.html | 2018-02-28 17:49:51 | |
| 0000858470-18-000006.txt | 2018-02-28 17:49:51 | |
 0000858470-18-000006-xbrl.zip | 383900 | 2018-02-28 17:49:51 |
| cog-12312017x10k.htm | 3776153 | 2018-02-28 17:49:51 |
 cog-1231201_chartx36587a03.jpg | 44142 | 2018-02-28 17:49:51 |
| cog-20171231.xml | 3672060 | 2018-02-28 17:49:51 |
| cog-20171231.xsd | 88142 | 2018-02-28 17:49:51 |
| cog-20171231_cal.xml | 171443 | 2018-02-28 17:49:51 |
| cog-20171231_def.xml | 418529 | 2018-02-28 17:49:51 |
| cog-20171231_lab.xml | 1214947 | 2018-02-28 17:49:51 |
| cog-20171231_pre.xml | 738162 | 2018-02-28 17:49:51 |
| cog12312017ex211.htm | 2664 | 2018-02-28 17:49:51 |
| cog12312017ex231.htm | 3807 | 2018-02-28 17:49:51 |
| cog12312017ex232.htm | 8503 | 2018-02-28 17:49:51 |
| cog12312017ex311.htm | 8507 | 2018-02-28 17:49:51 |
| cog12312017ex312.htm | 8527 | 2018-02-28 17:49:51 |
| cog12312017ex321.htm | 8580 | 2018-02-28 17:49:51 |
| cog12312017ex991.htm | 65081 | 2018-02-28 17:49:51 |
| FilingSummary.xml | 56913 | 2018-02-28 17:49:51 |
| Financial_Report.xlsx | 136763 | 2018-02-28 17:49:51 |
| R1.htm | 28226 | 2018-02-28 17:49:51 |
| R10.htm | 83584 | 2018-02-28 17:49:51 |
| R11.htm | 9418 | 2018-02-28 17:49:51 |
| R12.htm | 79920 | 2018-02-28 17:49:51 |
| R13.htm | 68883 | 2018-02-28 17:49:51 |
| R14.htm | 101555 | 2018-02-28 17:49:51 |
| R15.htm | 146382 | 2018-02-28 17:49:51 |
| R16.htm | 133431 | 2018-02-28 17:49:51 |
| R17.htm | 18690 | 2018-02-28 17:49:51 |
| R18.htm | 28139 | 2018-02-28 17:49:51 |
| R19.htm | 138715 | 2018-02-28 17:49:51 |
| R2.htm | 93613 | 2018-02-28 17:49:51 |
| R20.htm | 178265 | 2018-02-28 17:49:51 |
| R21.htm | 18066 | 2018-02-28 17:49:51 |
| R22.htm | 326626 | 2018-02-28 17:49:51 |
| R23.htm | 31677 | 2018-02-28 17:49:51 |
| R24.htm | 42373 | 2018-02-28 17:49:51 |
| R25.htm | 78117 | 2018-02-28 17:49:51 |
| R26.htm | 20387 | 2018-02-28 17:49:51 |
| R27.htm | 121846 | 2018-02-28 17:49:51 |
| R28.htm | 20842 | 2018-02-28 17:49:51 |
| R29.htm | 77921 | 2018-02-28 17:49:51 |
| R3.htm | 10842 | 2018-02-28 17:49:51 |
| R30.htm | 56099 | 2018-02-28 17:49:51 |
| R31.htm | 70968 | 2018-02-28 17:49:51 |
| R32.htm | 186039 | 2018-02-28 17:49:51 |
| R33.htm | 128160 | 2018-02-28 17:49:51 |
| R34.htm | 15994 | 2018-02-28 17:49:51 |
| R35.htm | 25051 | 2018-02-28 17:49:51 |
| R36.htm | 134276 | 2018-02-28 17:49:51 |
| R37.htm | 164027 | 2018-02-28 17:49:51 |
| R38.htm | 282843 | 2018-02-28 17:49:51 |
| R39.htm | 33234 | 2018-02-28 17:49:51 |
| R4.htm | 75890 | 2018-02-28 17:49:51 |
| R40.htm | 43837 | 2018-02-28 17:49:51 |
| R41.htm | 77648 | 2018-02-28 17:49:51 |
| R42.htm | 19633 | 2018-02-28 17:49:51 |
| R43.htm | 53938 | 2018-02-28 17:49:51 |
| R44.htm | 13875 | 2018-02-28 17:49:51 |
| R45.htm | 18831 | 2018-02-28 17:49:51 |
| R46.htm | 18720 | 2018-02-28 17:49:51 |
| R47.htm | 46563 | 2018-02-28 17:49:51 |
| R48.htm | 22476 | 2018-02-28 17:49:51 |
| R49.htm | 12118 | 2018-02-28 17:49:51 |
| R5.htm | 21155 | 2018-02-28 17:49:51 |
| R50.htm | 9045 | 2018-02-28 17:49:51 |
| R51.htm | 18102 | 2018-02-28 17:49:51 |
| R52.htm | 23738 | 2018-02-28 17:49:51 |
| R53.htm | 27505 | 2018-02-28 17:49:51 |
| R54.htm | 196063 | 2018-02-28 17:49:51 |
| R55.htm | 34741 | 2018-02-28 17:49:51 |
| R56.htm | 39717 | 2018-02-28 17:49:51 |
| R57.htm | 16621 | 2018-02-28 17:49:51 |
| R58.htm | 34010 | 2018-02-28 17:49:51 |
| R59.htm | 13429 | 2018-02-28 17:49:51 |
| R6.htm | 9995 | 2018-02-28 17:49:51 |
| R60.htm | 31224 | 2018-02-28 17:49:51 |
| R61.htm | 13843 | 2018-02-28 17:49:51 |
| R62.htm | 15177 | 2018-02-28 17:49:51 |
| R63.htm | 12748 | 2018-02-28 17:49:51 |
| R64.htm | 14591 | 2018-02-28 17:49:51 |
| R65.htm | 4704 | 2018-02-28 17:49:51 |
| R66.htm | 17587 | 2018-02-28 17:49:51 |
| R67.htm | 19400 | 2018-02-28 17:49:51 |
| R68.htm | 4431 | 2018-02-28 17:49:51 |
| R69.htm | 22375 | 2018-02-28 17:49:51 |
| R7.htm | 88439 | 2018-02-28 17:49:51 |
| R70.htm | 47629 | 2018-02-28 17:49:51 |
| R71.htm | 41662 | 2018-02-28 17:49:51 |
| R72.htm | 27573 | 2018-02-28 17:49:51 |
| R73.htm | 39434 | 2018-02-28 17:49:51 |
| R74.htm | 24942 | 2018-02-28 17:49:51 |
| R75.htm | 11662 | 2018-02-28 17:49:51 |
| R76.htm | 10212 | 2018-02-28 17:49:51 |
| R77.htm | 29982 | 2018-02-28 17:49:51 |
| R78.htm | 17572 | 2018-02-28 17:49:51 |
| R79.htm | 11390 | 2018-02-28 17:49:51 |
| R8.htm | 60159 | 2018-02-28 17:49:51 |
| R80.htm | 14283 | 2018-02-28 17:49:51 |
| R81.htm | 46095 | 2018-02-28 17:49:51 |
| R82.htm | 32753 | 2018-02-28 17:49:51 |
| R83.htm | 29050 | 2018-02-28 17:49:51 |
| R84.htm | 40142 | 2018-02-28 17:49:51 |
| R85.htm | 40388 | 2018-02-28 17:49:51 |
| R86.htm | 29882 | 2018-02-28 17:49:51 |
| R87.htm | 147491 | 2018-02-28 17:49:51 |
| R88.htm | 9953 | 2018-02-28 17:49:51 |
| R89.htm | 10509 | 2018-02-28 17:49:51 |
| R9.htm | 4625 | 2018-02-28 17:49:51 |
| R90.htm | 17003 | 2018-02-28 17:49:51 |
| R91.htm | 18649 | 2018-02-28 17:49:51 |
| R92.htm | 74934 | 2018-02-28 17:49:51 |
| R93.htm | 10054 | 2018-02-28 17:49:51 |
| report.css | 2768 | 2018-02-28 17:49:51 |
| Show.js | 1411 | 2018-02-28 17:49:51 |