| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 155323 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1090917 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 334436 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | TO PRESERVE THE LEGACY OF MARYGROVE COLLEGE THROUGH THE ADVANCEMENT OF INTEGRATED P-20 EDUCATIONAL OPPORTUNITIES FOR LOW-INCOME CHILDREN AND FAMILIES, PARTICULARLY WITHIN THE LIVERNOIS AND MCNICHOLS CORRIDORS OF DETROIT, MICHIGAN. |
| IRS990/AllOtherContributionsAmt | 0 | 5491539 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 83 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 82 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 285 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 450 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | AARON SEYBERT |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2485020620 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 3215 WEST BIG BEAVER ROAD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | TROY |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MI |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 48084 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 300000 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 119634 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 5 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 392279 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 331868 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 327705 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 279812 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 4 | 275972 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | PO BOX 828854 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 26500 AMERICAN DRIVE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 422 CONGRESS SUITE 200 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 3120 EAST OAKLEY PARK |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 4 | PO BOX 601 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | PHILADEPHIA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | SOUTHFIELD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | DETROIT |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | COMMERCE TWP |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 4 | BELLEVILLE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | PA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | MI |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | MI |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | MI |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 4 | MI |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 19182 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 48034 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 48226 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 48390 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 4 | 48112 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | ALLIED UNIVERSAL SECURITY SERVICES |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | BARTON MALOW COMPANY |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | BEANSTALK REAL ESTATE SOLUTIONS |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 3 | COMMERCIAL INTERIOR RESOURCES INC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 4 | MASTER MAINTENANCE CORPORATION |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | SECURITY |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | CONSTRUCTION |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | PROPERTY MANAGEMENT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | RENOVATIONS |
| IRS990/ContractorCompensationGrp/ServicesDesc | 4 | JANITORIAL SERVICES |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 5491539 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 574 |
| IRS990/CYOtherExpensesAmt | 0 | 3833526 |
| IRS990/CYOtherRevenueAmt | 0 | 574526 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 2233113 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 3833526 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 75173 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 6066639 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 269464 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 269464 |
| IRS990/Desc | 0 | OPERATION OF PROPERTY HELD AS PART OF MARYGROVE COLLEGE LEGACY |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 35000 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 3502837 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 5670 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 28350 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 22680 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 56700 |
| IRS990/FeesForServicesLegalGrp/FundraisingAmt | 0 | 13428 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 67139 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 53711 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 134278 |
| IRS990/FeesForServicesManagementGrp/ProgramServicesAmt | 0 | 327786 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 327786 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 25120 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 125600 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 100480 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 251200 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | 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/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | SR MARY JANE HERB |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | AARON SEYBERT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | GLENDA PRICE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | ELIZABETH A BURNS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | MICHAEL FORSYTH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | ANTOINE GARIBALDI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | WENDY LEWIS JACKSON |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| 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/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2017 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 7 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 5984 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 6066639 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 574526 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 7 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 15100 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 17258 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 183361 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 215719 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 605809 |
| IRS990/InterestGrp/TotalAmt | 0 | 605809 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 574 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 574 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 16 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 489403 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 9710060 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 11595365 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 12084768 |
| IRS990/LegalDomicileStateCd | 0 | MI |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | TO RECEIVE AND ADMINISTER FUNDS AND PROPERTY AND TO OPERATE EXCLUSIVELY FOR CHARITABLE, EDUCATIONAL, SCIENTIFIC, AND LITERARY PURPOSES, AS WELL AS TO PRESERVE THE LEGACY OF MARYGROVE COLLEGE THROUGH THE ADVANCEMENT OF EDUCATIONAL OPPORTUNITIES FOR CHILDREN AND FAMILIES, PARTICULARLY WITHIN THE LIVERNOIS AND MCNICHOLS CORRIDORS OF DETROIT, MICHIGAN, BY PROVIDING SPACE, INFRASTRUCTURE, AND OTHER ASSISTANCE TO SUPPORT INTEGRATED P-20 EDUCATION MODELS THAT PROVIDE COMPREHENSIVE SUPPORT FROM PRE-NATAL THROUGH COLLEGE TO CAREER AND OTHER COMMUNITY-BASED ACTIVITIES AND PROGRAMMING. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 6484484 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 6484484 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 3575199 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 5808312 |
| IRS990/NetRentalIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 574526 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 574526 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 3575199 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 5773312 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 542842 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 542842 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 15772 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 17087 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 98578 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 131437 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | REPAIRS AND MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 1 | SECURITY |
| IRS990/OtherExpensesGrp/Desc | 2 | EVENT EXPENSES |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 744772 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 398442 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 154627 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 744772 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 398442 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 154627 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 2350 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 155323 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 117914 |
| IRS990/PrincipalOfficerNm | 0 | SR MARY JANE HERB |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 350000 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 3 |
| IRS990/PYOtherExpensesAmt | 0 | 220320 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 129683 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 220320 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 350003 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 2233113 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 574526 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 574526 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 49623 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 1224698 |
| IRS990ScheduleA/First5Years170Ind | 0 | X |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | MARYGROVE CONSERVANCY COMMENCED OPERATIONS EFFECTIVE SEPTEMBER 5, 2017. THEREFORE, THE 2017 COLUMN REPRESENTS A SHORT PERIOD. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | PART II, SHORT YEAR EXPLANATION: |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 5491539 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 350000 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 3067609 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 8909148 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 575100 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 3 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 575103 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 3292294 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 5616854 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 5491539 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 350000 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 3067609 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 8909148 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 9484251 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 8487916 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 449084 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 8937000 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 3833526 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 993000 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 993000 |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 2114449 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 40319 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 2154768 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 2350 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | SECURITY DEPOSITS |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 0 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 6066639 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | THE CONSERVANCY'S MANAGEMENT IS NOT AWARE OF ANY UNCERTAIN TAX POSITIONS OR UNRECOGNIZED TAX BENEFITS AS OF DECEMBER 31, 2019. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X, LINE 2: |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE TREASURER WILL CONTRACT WITH A LICENSED C.P.A. FIRM ON BEHALF OF THE ORGANIZATION TO PREPARE FORM 990. THE TREASURER WILL PROVIDE ALL NECESSARY INFORMATION TO COMPLETE THE FORM TO THE INDEPENDENT TAX PREPARER. THE TAX PREPARER WILL PROVIDE A DRAFT OF FORM 990 TO BE REVIEWED BY THE EXECUTIVE COMMITTEE. THE EXECUTIVE COMMITTEE WILL PROVIDE COMMENTS TO THE TAX PREPARER. THE TAX PREPARER WILL MAKE CHANGES AS APPROPRIATE AND PREPARE THE FINAL RETURN. THE TAX PREPARER WILL PROVIDE THE FINAL FORM TO THE TREASURER. THE TREASURER WILL PRESENT THE FINAL FORM TO THE FULL BOARD OF DIRECTORS. THE BOARD OF DIRECTORS WILL APPROVE THE FINAL FORM 990 BEFORE THE FORM IS FILED BY THE TAX PREPARER. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | THE ORGANIZATION HAS ALL COMMITTEE MEMBERS, AND BOARD MEMBERS SIGN A CONFLICT OF INTEREST STATEMENT ANNUALLY. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | GOVERNING DOCUMENTS AND THE CONFLICT OF INTEREST POLICY ARE AVAILABLE BY WRITTEN REQUEST TO THE ORGANIZATION. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION C, LINE 19 |
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