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      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>cpe-20160930.xml</File>
    <File>cpe-20160930.xsd</File>
    <File>cpe-20160930_cal.xml</File>
    <File>cpe-20160930_def.xml</File>
    <File>cpe-20160930_lab.xml</File>
    <File>cpe-20160930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
