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|---|---|---|
 0000859598-20-000085-index-headers.html | 2020-10-29 17:04:49 | |
| 0000859598-20-000085-index.html | 2020-10-29 17:04:49 | |
| 0000859598-20-000085.txt | 2020-10-29 17:04:49 | |
 0000859598-20-000085-xbrl.zip | 41413 | 2020-10-29 17:04:49 |
| ckh-20201029.htm | 36509 | 2020-10-29 17:04:49 |
| ckh-20201029.xsd | 2445 | 2020-10-29 17:04:49 |
| ckh-20201029_cal.xml | 730 | 2020-10-29 17:04:49 |
| ckh-20201029_def.xml | 21299 | 2020-10-29 17:04:49 |
| ckh-20201029_htm.xml | 10239 | 2020-10-29 17:04:49 |
| ckh-20201029_lab.xml | 37606 | 2020-10-29 17:04:49 |
| ckh-20201029_pre.xml | 21848 | 2020-10-29 17:04:49 |
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| exhibit991q32020earningsre.htm | 608665 | 2020-10-29 17:04:49 |
| FilingSummary.xml | 1732 | 2020-10-29 17:04:49 |
| Financial_Report.xlsx | 5492 | 2020-10-29 17:04:49 |
| MetaLinks.json | 26093 | 2020-10-29 17:04:49 |
| R1.htm | 43930 | 2020-10-29 17:04:49 |
| report.css | 2767 | 2020-10-29 17:04:49 |
| Show.js | 1085 | 2020-10-29 17:04:49 |