Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000859598-20-000034-index-headers.html | 2020-04-28 17:14:35 | |
| 0000859598-20-000034-index.html | 2020-04-28 17:14:35 | |
| 0000859598-20-000034.txt | 2020-04-28 17:14:35 | |
 0000859598-20-000034-xbrl.zip | 47593 | 2020-04-28 17:14:35 |
| ckh-20200428.htm | 43891 | 2020-04-28 17:14:35 |
| ckh-20200428.xsd | 2586 | 2020-04-28 17:14:35 |
| ckh-20200428_cal.xml | 730 | 2020-04-28 17:14:35 |
| ckh-20200428_def.xml | 21299 | 2020-04-28 17:14:35 |
| ckh-20200428_htm.xml | 10220 | 2020-04-28 17:14:35 |
| ckh-20200428_lab.xml | 37606 | 2020-04-28 17:14:35 |
| ckh-20200428_pre.xml | 21848 | 2020-04-28 17:14:35 |
 colorlogockh1.jpg | 16419 | 2020-04-28 17:14:35 |
| exhibit991q12020earnin.htm | 1052059 | 2020-04-28 17:14:35 |
| FilingSummary.xml | 1728 | 2020-04-28 17:14:35 |
| Financial_Report.xlsx | 5838 | 2020-04-28 17:14:35 |
| MetaLinks.json | 26752 | 2020-04-28 17:14:35 |
| R1.htm | 43925 | 2020-04-28 17:14:35 |
| report.css | 2767 | 2020-04-28 17:14:35 |
| Show.js | 1085 | 2020-04-28 17:14:35 |