Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-362541-index-headers.html | 2021-12-20 17:11:55 | |
| 0001193125-21-362541-index.html | 2021-12-20 17:11:55 | |
| 0001193125-21-362541.txt | 2021-12-20 17:11:55 | |
 0001193125-21-362541-xbrl.zip | 115758 | 2021-12-20 17:11:55 |
| cpk-20211216.xsd | 2913 | 2021-12-20 17:11:55 |
| cpk-20211216_lab.xml | 17374 | 2021-12-20 17:11:55 |
| cpk-20211216_pre.xml | 10968 | 2021-12-20 17:11:55 |
| d263836d8k.htm | 50351 | 2021-12-20 17:11:55 |
| d263836d8k_htm.xml | 3329 | 2021-12-20 17:11:55 |
| d263836dex101.htm | 95344 | 2021-12-20 17:11:55 |
| d263836dex102.htm | 95059 | 2021-12-20 17:11:55 |
| d263836dex103.htm | 95247 | 2021-12-20 17:11:55 |
| d263836dex104.htm | 95285 | 2021-12-20 17:11:55 |
| d263836dex105.htm | 95240 | 2021-12-20 17:11:55 |
| d263836dex991.htm | 15029 | 2021-12-20 17:11:55 |
| FilingSummary.xml | 1908 | 2021-12-20 17:11:55 |
| Financial_Report.xlsx | 5681 | 2021-12-20 17:11:55 |
 g263836g1220235118370.jpg | 4106 | 2021-12-20 17:11:55 |
| MetaLinks.json | 18150 | 2021-12-20 17:11:55 |
| R1.htm | 38629 | 2021-12-20 17:11:55 |
| report.css | 2767 | 2021-12-20 17:11:55 |
| Show.js | 1085 | 2021-12-20 17:11:55 |