<?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>R7.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>66</ContextCount>
  <SegmentCount>30</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <UnitCount>2</UnitCount>
  <ElementCount>85</ElementCount>
  <FootnotesReported>true</FootnotesReported>
  <TuplesReported>false</TuplesReported>
  <ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996158</ContextName>
      <ElementCount>66</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996140_429555x-9998684</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996112_429555x-9998686</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996111</ContextName>
      <ElementCount>54</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996142</ContextName>
      <ElementCount>61</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996115_429555x-9998686</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996109</ContextName>
      <ElementCount>55</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996113</ContextName>
      <ElementCount>60</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996125</ContextName>
      <ElementCount>68</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996110_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996112_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996158_429555x429511</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996125_429555x429483</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996158_429555x-9998778</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996134_429555x429483</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996134</ContextName>
      <ElementCount>60</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996111_429555x-9998778</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996140</ContextName>
      <ElementCount>58</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996132_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996109_429555x-9998778</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996113_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996134_429555x429511</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996111_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996132_429555x-9998684</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996140_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996132</ContextName>
      <ElementCount>58</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996092_429423x-9996116_429555x429511</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996110</ContextName>
      <ElementCount>57</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996142_429555x-9998686</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996092_429423x-9996116</ContextName>
      <ElementCount>68</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996125_429555x429511</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996131_429555x-9998686</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996115_429555x429483</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996157_429555x429483</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996109_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996113_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996112_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996157_429555x429511</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996092_429423x-9996116_429555x429483</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996111_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996134_429555x-9998686</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996132_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996157</ContextName>
      <ElementCount>66</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996131</ContextName>
      <ElementCount>56</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996109_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996131_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996110_429555x-9998778</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9995647</ContextName>
      <ElementCount>28</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996142_429555x429483</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996157_429555x-9998778</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996112</ContextName>
      <ElementCount>59</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996140_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996132_429555x-9998683</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0</ContextName>
      <ElementCount>8</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996142_429555x429511</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996158_429555x429483</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9995647_429423x-9995651</ContextName>
      <ElementCount>9</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996115_429555x429511</ContextName>
      <ElementCount>5</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996092_429423x-9996116_429555x-9998687</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996140_429555x-9998683</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996084_429423x-9996110_429555x429483</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996091_429423x-9996115</ContextName>
      <ElementCount>63</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996087_429423x-9996131_429555x429511</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996113_429555x-9998684</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996101_429423x-9996125_429555x-9998778</ContextName>
      <ElementCount>6</ElementCount>
    </ContextSummary>
    <ContextSummary>
      <ContextName>eol_0001104659-11-005144_STD_372_20110204_0_396770x-9996089_429423x-9996113_429555x-9998683</ContextName>
      <ElementCount>4</ElementCount>
    </ContextSummary>
  </ContextSummary>
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
