<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.2.0.7</Version>
  <MyReports>
    <Report>
      <IsDefault>true</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ShortName>Document and Entity Information</ShortName>
      <Role>http://www.enscointernational.com/role/DocumentDocumentEntityInformation</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R1.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>00100 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME</LongName>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF INCOME</ShortName>
      <Role>http://www.enscointernational.com/role/StatementConsolidatedStatementsOfIncome</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R2.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>00200 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <Role>http://www.enscointernational.com/role/StatementConsolidatedBalanceSheets</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R3.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>00205 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <Role>http://www.enscointernational.com/role/StatementConsolidatedBalanceSheetParenthetical</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R4.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>00300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ShortName>CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <Role>http://www.enscointernational.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R5.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10101 - Disclosure - Unaudited Condensed Consolidated Financial Statements</LongName>
      <ShortName>Unaudited Condensed Consolidated Financial Statements</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureUnauditedQuarterlyFinancialData</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R6.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10201 - Disclosure - Noncontrolling Interests</LongName>
      <ShortName>Noncontrolling Interests</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureLongTermInvestments</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R7.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10301 - Disclosure - Earnings Per Share</LongName>
      <ShortName>Earnings Per Share</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureShareholdersEquity</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R8.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10401 - Disclosure - Derivative Instruments</LongName>
      <ShortName>Derivative Instruments</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureDerivativeInstruments</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R9.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10501 - Disclosure - Accrued Liabilities and Other</LongName>
      <ShortName>Accrued Liabilities and Other</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureIncomeTaxes</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R10.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10601 - Disclosure - Long-Term Debt</LongName>
      <ShortName>Long-Term Debt</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureLongTermDebt</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R11.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10701 - Disclosure - Share-Based Compensation</LongName>
      <ShortName>Share-Based Compensation</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureShareBasedCompensations</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R12.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10801 - Disclosure - Comprehensive Income</LongName>
      <ShortName>Comprehensive Income</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureComprehensiveIncome</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R13.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>10901 - Disclosure - Fair Value Measurements</LongName>
      <ShortName>Fair Value Measurements</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureFairValueMeasurements</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R14.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>11001 - Disclosure - Income Taxes</LongName>
      <ShortName>Income Taxes</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureIncomeTaxe</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R15.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>11101 - Disclosure - Discontinued Operations</LongName>
      <ShortName>Discontinued Operations</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureDiscontinuedOperations</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R16.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>11201 - Disclosure - Contingencies</LongName>
      <ShortName>Contingencies</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R17.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>11301 - Disclosure - Segment Information</LongName>
      <ShortName>Segment Information</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureSegmentInformation</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R18.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>11401 - Disclosure - Subsequent Events</LongName>
      <ShortName>Subsequent Events</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureSubsequentEvent</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R19.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>30203 - Disclosure - Noncontrolling Interests (Tables)</LongName>
      <ShortName>Noncontrolling Interests (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureNocontrollingInterestTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R20.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>30303 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureEarningsPerShareTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R21.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>30403 - Disclosure - Derivative Instruments (Tables)</LongName>
      <ShortName>Derivative Instruments (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureDerivativeInstrumentsTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R22.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>30503 - Disclosure - Accrued Liabilities and Other (Tables)</LongName>
      <ShortName>Accrued Liabilities and Other (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureAccruedLiabilitiesAndOtherTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R23.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>30703 - Disclosure - Share-Based Compensation (Tables)</LongName>
      <ShortName>Share-Based Compensation (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureShareBasedCompensationTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R24.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>30803 - Disclosure - Comprehensive Income (Tables)</LongName>
      <ShortName>Comprehensive Income (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureComprehensiveIncomeTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R25.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>30903 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R26.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>31103 - Disclosure - Discontinued Operations (Tables)</LongName>
      <ShortName>Discontinued Operations (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureDiscontinuedOperationsTables</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R27.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>31303 - Disclosure - Segment Information (Tables)</LongName>
      <ShortName>Segment Information (Tables)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureSegmentInformationTable</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R28.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40201 - Disclosure - Noncontrolling Interests (Details)</LongName>
      <ShortName>Noncontrolling Interests (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureNoncontrollingInterestDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R29.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40301 - Disclosure - Earnings Per Share (Details)</LongName>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureEarningsPerShareDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R30.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40401 - Disclosure - Derivative Instruments (Details)</LongName>
      <ShortName>Derivative Instruments (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureDerivativeInstrumentsDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R31.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40501 - Disclosure - Accrued Liabilities and Other (Details)</LongName>
      <ShortName>Accrued Liabilities and Other (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureAccruedLiabilitiesAndOtherDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R32.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40601 - Disclosure - Long-Term Debt (Details)</LongName>
      <ShortName>Long-Term Debt (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureLongTermDebtDetail</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R33.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40701 - Disclosure - Share-Based Compensation (Details)</LongName>
      <ShortName>Share-Based Compensation (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureShareBasedCompensationDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R34.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40801 - Disclosure - Comprehensive Income (Details)</LongName>
      <ShortName>Comprehensive Income (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureComprehensiveIncomeDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R35.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>40901 - Disclosure - Fair Value Measurements (Details)</LongName>
      <ShortName>Fair Value Measurements (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureFairValueMeasurementsDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R36.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>41004 - Disclosure - Income Taxes (Details)</LongName>
      <ShortName>Income Taxes (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureIncomeTaxesDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R37.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>41101 - Disclosure - Discontinued Operations (Details)</LongName>
      <ShortName>Discontinued Operations (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureDiscontinuedOperationsDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R38.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>41201 - Disclosure - Contingencies (Details)</LongName>
      <ShortName>Contingencies (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureContingencies</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R39.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>41301 - Disclosure - Segment Information (Details)</LongName>
      <ShortName>Segment Information (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureSegmentInformationDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R40.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>41404 - Disclosure - Subsequent Events (Details)</LongName>
      <ShortName>Subsequent Events (Details)</ShortName>
      <Role>http://www.enscointernational.com/role/DisclosureSubsequentEventsDetails</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R41.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Book</ReportType>
      <LongName>All Reports</LongName>
      <ShortName>All Reports</ShortName>
      <Role />
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName />
    </Report>
  </MyReports>
  <EntityCount>1</EntityCount>
  <ContextCount>98</ContextCount>
  <SegmentCount>32</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <UnitCount>5</UnitCount>
  <ElementCount>244</ElementCount>
  <FootnotesReported>true</FootnotesReported>
  <TuplesReported>false</TuplesReported>
  <ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201016</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_20102</ContextName>
      <ElementCount>8</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201013</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_20092</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_3_31_2009</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20106</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20109</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20106</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20109</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_201082</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201049</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201042</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20098</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201044</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20095</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_20094</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201018</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20102</ContextName>
      <ElementCount>64</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201047</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_20104</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20097</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20092</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20104</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_20097</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201019</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201017</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_2010414</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20104</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20107</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20098</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_200952</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_201022</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201015</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201043</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_20103</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_2009</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201014</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20105</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_12_31_2009</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_2009</ContextName>
      <ElementCount>69</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_2010411</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_2008</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_2010</ContextName>
      <ElementCount>58</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_200910</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_2010</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20108</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20093</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201020</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_3_31_2010</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_200973</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201046</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_20096</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20093</ContextName>
      <ElementCount>46</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_20093</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20094</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_200972</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_201010</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_20092</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_20093</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_200974</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201045</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_2009</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20094</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_20096</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20102</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20103</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20108</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20096</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_3_31_2010</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_200911</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20097</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_200973</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_2010412</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201062</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_2010</ContextName>
      <ElementCount>140</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_200972</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20107</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20092</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_20094</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20099</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_20095</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20096</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_201092</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_200982</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2010_To_6_30_20105</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_20098</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_12_31_20095</ContextName>
      <ElementCount>2</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201032</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201012</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2009_To_6_30_20097</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_2010413</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_20103</ContextName>
      <ElementCount>3</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_20095</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201011</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>As_Of_6_30_201010</ContextName>
      <ElementCount>1</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_2010410</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_4_1_2009_To_6_30_2009</ContextName>
      <ElementCount>48</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>Duration_1_1_2010_To_6_30_201048</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
  </ContextSummary>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
