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| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 613715 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 393194 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 352253 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | THE MARSH FOUNDATION IS A CHILDREN'S HOME AND SCHOOL FOR CHILDREN EXPERIENCING ADJUSTMENT PROBLEMS AND PROVIDES BEHAVIORAL TREATMENT AND FAMILY AND TREATMENT FOSTER CARE. |
| IRS990/AllOtherContributionsAmt | 0 | 1736 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 11193 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 215777 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 226970 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | JEFF GROTHOUSE |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4192381695 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1 | 0 | PO BOX 150 |
| IRS990/BooksInCareOfDetail/USAddress/City | 0 | VAN WERT |
| IRS990/BooksInCareOfDetail/USAddress/State | 0 | OH |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCode | 0 | 45891 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 1450 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 1450 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 124058 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 124058 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 1643 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 11842 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 13485 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 53373 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 2427153 |
| IRS990/CYOtherExpensesAmt | 0 | 1736443 |
| IRS990/CYOtherRevenueAmt | 0 | 632589 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 3041940 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 1187087 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 3231525 |
| IRS990/CYTotalExpensesAmt | 0 | 4967968 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 6155055 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 27518 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 11236 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 15263 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 229848 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 245111 |
| IRS990/Desc | 0 | SCHOOLING FOR CHILDREN IN NEED OF FOSTER CARE AND/OR GROUP HOME RESIDENTIAL CARE. ITS PURPOSE IS TO ASSIST FAMILIES AND CHILDREN WHO ARE EXPERIENCING MILD TO MODERATE ADJUSTMENT PROBLEMS. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 106 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 4544412 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 18305 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 32797 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 51102 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 850 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 6399 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 7249 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 36119 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 36119 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | GARY CORCORAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | ROBERT GAMBLE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | GARY CLAY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | GERALD THATCHER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JEFF GROTHOUSE |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 17234 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 14756 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 7097 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 4200 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 80771 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | EXEC SEC |
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| IRS990/FormationYr | 0 | 1920 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 469407 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 380312 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 3 |
| IRS990/GovernmentGrantsAmt | 0 | 51637 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 469407 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 7691494 |
| IRS990/GrossReceiptsAmt | 0 | 13682645 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 848997 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 6115 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 59055 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 65170 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 449204 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 432811 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 1577434 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 1577434 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 20825 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 21572 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 42465305 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 44544190 |
| IRS990/IRPDocumentCnt | 0 | 16 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 6032360 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 5560714 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 7227349 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 13259709 |
| IRS990/LegalDomicileStateCd | 0 | OH |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 7311182 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 216408 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | THE MARSH FOUNDATION IS A CHILDREN'S HOME AND SCHOOL FOR CHILDREN EXPERIENCING ADJUSTMENT PROBLEMS AND PROVIDES BEHAVIORAL TREATMENT AND FAMILY AND TREATMENT FOSTER CARE. |
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| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 50447381 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 54908977 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 845842 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 3877 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 849719 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 632589 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 632589 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 3274509 |
| IRS990/NondeductibleContributionsInd | 0 | false |
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| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 158056 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 164648 |
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| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
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| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 66232 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 76397 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 437041 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 513438 |
| IRS990/OtherExpensesGrp/Desc | 0 | FOSTER PARENT PER DIEMS |
| IRS990/OtherExpensesGrp/Desc | 1 | PROGRAM EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | FOOD |
| IRS990/OtherExpensesGrp/Desc | 3 | CONTRACT SERVICES |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 20782 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 5747 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 3847 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 340315 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 260263 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 154907 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 139208 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 340315 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 281045 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 160654 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 143055 |
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| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 2154805 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 2224220 |
| IRS990/OthNotesLoansReceivableNetGrp/BOYAmt | 0 | 62100 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 40000 |
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| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 17817 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 222556 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 240373 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 8050 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 121386 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 129436 |
| IRS990/PermanentlyRstrNetAssetsGrp/BOYAmt | 0 | 26107711 |
| IRS990/PermanentlyRstrNetAssetsGrp/EOYAmt | 0 | 26107711 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
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| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 88888 |
| IRS990/PrincipalOfficerNm | 0 | JEFFREY GROTHOUSE |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PROGRAM FEES TITLE IV-E |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | MEDICAID PROGRAMS |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | PARTIAL SUPP-SOC SEC/PARENTS |
| IRS990/ProgramServiceRevenueGrp/Desc | 3 | VO-AG AND SCHOOL INCOME |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 0 | 235 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2593549 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 399409 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 48747 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 2593549 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 399409 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 48747 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 3 | 235 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 49342 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 3531269 |
| IRS990/PYOtherExpensesAmt | 0 | 1646676 |
| IRS990/PYOtherRevenueAmt | 0 | 737648 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 2819580 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 2448363 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 3042800 |
| IRS990/PYTotalExpensesAmt | 0 | 4689476 |
| IRS990/PYTotalRevenueAmt | 0 | 7137839 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 1187087 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 632589 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 1843102 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 2759183 |
| IRS990ScheduleA/SchoolInd | 0 | X |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 4172213 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 5063746 |
| IRS990ScheduleD/BuildingsGrp/InvestmentCostOrOtherBasisAmt | 0 | 616183 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 8619776 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 47959101 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 51782393 |
| IRS990ScheduleD/CYEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 4124228 |
| IRS990ScheduleD/CYEndwmtFundGrp/OtherExpendituresAmt | 0 | 300936 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 45965770 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 47959101 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 2273840 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 280509 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 46102008 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 45965770 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 138075 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 274313 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 41236411 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 46102008 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 5231859 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 366262 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 37827601 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 41236411 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 4296329 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 887519 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | false |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 218 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 296358 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 296576 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | -216408 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 5184376 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 1746757 |
| IRS990ScheduleD/LandGrp/InvestmentCostOrOtherBasisAmt | 0 | 1399366 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 347391 |
| IRS990ScheduleD/NetUnrealizedGainsInvstAmt | 0 | 3274509 |
| IRS990ScheduleD/OtherExpensesNotIncludedAmt | 0 | -216408 |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 1308161 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 672256 |
| IRS990ScheduleD/OtherLandBuildingsGrp/InvestmentCostOrOtherBasisAmt | 0 | 469814 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 1510603 |
| IRS990ScheduleD/OtherRevenuesNotIncludedAmt | 0 | -216408 |
| IRS990ScheduleD/PrmnntEndowmentBalanceEOYPct | 0 | 0.50420 |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 3274509 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | -216408 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 6371463 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE PERMANENTLY RESTRICTED ENDOWMENT FUNDS ARE INVESTED TO PROVIDE EARNINGS FOR THE MARSH FOUNDATION TO FUND ITS INTENDED MISSION. THE TEMPORARILY RESTRICTED ENDOWMENT NET ASSETS CONSIST OF PROPERTY, PLANT, AND EQUIPMENT PURCHASED UNDER THE TERMS OF THE WILLS OF GEORGE H MARSH AND KATIE MARSH CLYMER IN ADDITION TO OTHER DONATIONS RECEIVED FOR THE HOME AND SCHOOL. THE NET ASSETS ARE TO BE USED BY THE FOUNDATION FOR THE HOME AND SCHOOL AND TO PROVIDE INCOME FOR THEIR OPERATING PURPOSES. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | RENTAL EXPENSES -216,408 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 2 | RENTAL EXPENSES -216,408 |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE D, PAGE 2, PART V, LINE 4 |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | SCHEDULE D, PAGE 4, PART XI, LINE 4B |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | SCHEDULE D, PAGE 4, PART XII, LINE 4B |
| IRS990ScheduleD/TermEndowmentBalanceEOYPct | 0 | 0.49580 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 7227349 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 4967968 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 6155055 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 9645972 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 5184376 |
| IRS990ScheduleE/ComplianceWithRevProc7550Ind | 0 | true |
| IRS990ScheduleE/DiscriminateRaceAdmissPlcyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceAthltProgInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceEducPlcyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceEmplmFcultyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceOtherActyInd | 0 | false |
| IRS990ScheduleE/DiscriminateRaceSchsInd | 0 | false |
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| IRS990ScheduleE/MaintainRacialCompRecsInd | 0 | true |
| IRS990ScheduleE/MaintainScholarshipsRecsInd | 0 | true |
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| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 0 | RACIAL NON-DISCRIMINATORY POLICY IS PUBLISHED ANNUALLY IN THE VAN WERT TIMES BULLETIN, LIMA NEWS AND TOLEDO BLADE IN ACCORDANCE WITH REVENUE PROCEDURE 75-50. |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 1 | PER DIEM AMOUNTS ARE RECEIVED FROM THE DEPARTMENT OF HUMAN SERVICES AND FROM THE COURT SYSTEM FOR PARTIAL SUPPORT OF CHILDREN FOR REIMBURSEMENT OF EXPENSES INCURRED BY THEM. A FEDERAL FOOD GRANT IS ALSO RECEIVED TO HELP WITH PROVIDING FOOD FOR THE CHILDREN. |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE E, LINE 3 |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | SCHEDULE E, LINE 6 |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | A COPY OF THE 990 WAS PROVIDED TO THE EXECUTIVE SECRETARY AND THE BOARD OF TRUSTEES PRIOR TO FILING. BEFORE FILING THE 990, THE EXECUTIVE SECRETARY REVIEWS THE 990 WITH THE CPA IN DETAIL. A GENERAL REVIEW IS PERFORMED BY THE GOVERNING BOARD AT THE BOARD MEETING BEFORE FILING THE FORM 990. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | EACH TRUSTEE AND THE EXECUTIVE SECRETARY/TREASURER ANUALLY COMPLETES A QUESTIONNAIRE TO DISCLOSE ANY CONFLICTS OF INTEREST. THE CONFLICTS OF INTEREST POLICY IS INCLUDED IN THE HANDBOOK THAT IS APPROVED BY THE TRUSTEES. THEREFORE, THERE IS A FULL UNDERSTANDING OF THE POLICY. THEY UNDERSTAND THAT THE FOUNDATION IS CHARITABLE AND IN ORDER TO MAINTAIN ITS FEDERAL TAX EXEMPTION IT MUST ENGAGE PRIMARILY IN ACTIVITIES WHICH ACCOMPLISH ONE OR MORE OF ITS TAX-EXEMPT PURPOSES. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | ANNUALLY, THE BOARD OF TRUSTEES REVIEWS AND APPROVES SALARIES OF EXECUTIVE DIRECTOR AFTER A REVIEW OF JOB DUTIES PERFORMED AND AN ANALYSIS OF COMPARABLE DATA. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | THE FOUNDATIONS'S TAX RETURN, GOVERNING DOCUMENTS, FINANCIAL STATEMENTS, AND CONFLICT OF INTEREST POLICY ARE AVAILABLE FOR REVIEW UPON REQUEST TO THE TRUSTEES OR EXECUTIVE SECRETARY. COPIES ARE MADE IF REQUESTED. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | RENTAL EXPENSES 216,408 RENTAL EXPENSES -216,408 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 6, PART VI, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PAGE 6, PART VI, LINE 15A |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PAGE 6, PART VI, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART XI, LINE 9 |
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