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    <Log type="Info">'Shares' elements on report '4050 - Disclosure - Stock-based Compensation (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4050 - Disclosure - Stock-based Compensation (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4071 - Disclosure - Long-Term Debt (Details 2)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4080 - Disclosure - Income Taxes (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4112 - Disclosure - Commitments and Contingencies (Details 3)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4120 - Disclosure - Property Sales and Acquisitions (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 0010 - Statement - Condensed Consolidated Balance Sheets</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jun. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2011'</Log>
    <Log type="Info">Process Flow-Through: 0015 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 0020 - Statement - Consolidated Statements of Income and Comprehensive Income</Log>
    <Log type="Info">Process Flow-Through: 0030 - Statement - Condensed Consolidated Statements of Cash Flows</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2012'</Log>
  </Logs>
  <InputFiles>
    <File>xec-20130630.xml</File>
    <File>xec-20130630.xsd</File>
    <File>xec-20130630_cal.xml</File>
    <File>xec-20130630_def.xml</File>
    <File>xec-20130630_lab.xml</File>
    <File>xec-20130630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
