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|---|---|---|
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| 0001193125-12-207908-index.html | 2012-05-03 14:14:11 | |
| 0001193125-12-207908.txt | 2012-05-03 14:14:11 | |
 0001193125-12-207908-xbrl.zip | 67246 | 2012-05-03 14:14:11 |
| cpk-20120331.xml | 460963 | 2012-05-03 14:14:11 |
| cpk-20120331.xsd | 15003 | 2012-05-03 14:14:11 |
| cpk-20120331_cal.xml | 54946 | 2012-05-03 14:14:11 |
| cpk-20120331_def.xml | 17432 | 2012-05-03 14:14:11 |
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| d338776dex321.htm | 3090 | 2012-05-03 14:14:11 |
| d338776dex322.htm | 3069 | 2012-05-03 14:14:11 |
| FilingSummary.xml | 11567 | 2012-05-03 14:14:11 |
| Financial_Report.xls | 389305 | 2012-05-03 14:14:11 |
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| R10.htm | 15548 | 2012-05-03 14:14:11 |
| R11.htm | 26352 | 2012-05-03 14:14:11 |
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| report.css | 2721 | 2012-05-03 14:14:11 |
| Show.js | 6423 | 2012-05-03 14:14:11 |