<?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>2.4.0.6</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>7</ContextCount>
  <ElementCount>50</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>6</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>2</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00101 - Document - Document And Entity Information {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.btim.com/role/DocumentDocumentandEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>01102 - Document - Risk/Return Summary {Unlabeled} (Boston Trust SMID Cap Fund)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.btim.com/role/RiskReturn_S000034664Member</Role>
      <ShortName>Risk/Return Summary  (Boston Trust SMID Cap Fund)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>040000 - Disclosure - Risk/Return Detail Data {Elements}</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/rr/role/RiskReturnDetailData</Role>
      <ShortName>Risk/Return Detail Data</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>true</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>06107 - Document - Risk/Return Summary {Unlabeled} (Walden SMID Cap Innovations Fund)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.btim.com/role/RiskReturn_S000034665Member</Role>
      <ShortName>Risk/Return Summary  (Walden SMID Cap Innovations Fund)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>06111 - Disclosure - Risk/Return Detail Data {Elements} (Walden SMID Cap Innovations Fund)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.btim.com/role/RiskReturnDetailData_S000034665Member</Role>
      <ShortName>Risk/Return Detail Data  (Walden SMID Cap Innovations Fund)</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs />
  <InputFiles>
    <File>ck0000882748-20111122.xml</File>
    <File>ck0000882748-20111122.xsd</File>
    <File>ck0000882748-20111122_cal.xml</File>
    <File>ck0000882748-20111122_def.xml</File>
    <File>ck0000882748-20111122_lab.xml</File>
    <File>ck0000882748-20111122_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
