<?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>2.2.0.25</Version>
  <ReportType />
  <MyReports>
    <Report>
      <IsDefault>true</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>010000 - Document - Risk/Return Summary {Unlabeled}</LongName>
      <ShortName>Risk/Return Summary</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturn</Role>
      <ContainEmbeddedReports>true</ContainEmbeddedReports>
      <XmlFileName>R1.xml</XmlFileName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ReportType>Sheet</ReportType>
      <LongName>040000 - Disclosure - Risk/Return Detail Data {Elements}</LongName>
      <ShortName>Risk/Return Detail Data</ShortName>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetailData</Role>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <XmlFileName>R8.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>9</ContextCount>
  <SegmentCount>8</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <UnitCount>2</UnitCount>
  <ElementCount>86</ElementCount>
  <FootnotesReported>false</FootnotesReported>
  <TuplesReported>false</TuplesReported>
  <ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092_429423x-9995096_429555x429511</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092_429423x-9995096_429555x429483</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092_429423x-9995096</ContextName>
      <ElementCount>36</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092_429423x-9995093</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092</ContextName>
      <ElementCount>42</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092_429423x-9995094</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092_429423x-9995095</ContextName>
      <ElementCount>20</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0_396770x-9995092_429555x-9998778</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0000897569-11-000004_STD_365_20110225_0</ContextName>
      <ElementCount>8</ElementCount>
    </ContextSummary>
  </ContextSummary>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
