| IRS990/AccountantCompileOrReviewInd | 0 | true |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 71843 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 103571 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 58745 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 14845 |
| IRS990/AcctCompileOrReviewBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | PRESERVATION OF ~20,000 ACRES OF DIVERSE NATURAL LANDS AND OPEN SPACE THROUGH ADAPTIVE LAND MANAGEMENT, ECOLOGICAL RESEARCH AND RESTORATION, CONSERVATION EASEMENT STEWARDSHIP AND ENVIRONMENTAL EDUCATION PROGRAMS. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 3733 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 3733 |
| IRS990/AllAffiliatesIncludedInd | 0 | false |
| IRS990/AllOtherContributionsAmt | 0 | 780040 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 1135 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 17131 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 18266 |
| IRS990/AmendedReturnInd | 0 | X |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | false |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | SANTA LUCIA CONSERVANCY |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 8316268595 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 26700 RANCHO SAN CARLOS ROAD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | CARMEL |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 93923 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | true |
| IRS990/BusinessRlnWithOrgMemInd | 0 | true |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 200 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 200 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 30992 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 103757 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 134749 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 8836 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 8836 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | true |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 837763 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 855545 |
| IRS990/CYOtherExpensesAmt | 0 | 516933 |
| IRS990/CYOtherRevenueAmt | 0 | 18887 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 669993 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 525269 |
| IRS990/CYTotalExpensesAmt | 0 | 1042202 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 1712195 |
| IRS990/DAFExcessBusinessHoldingsInd | 0 | false |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | true |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 4569 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 25895 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 30464 |
| IRS990/Desc | 0 | ADAPTIVE LAND MANAGEMENT AND HABITAT RESTORATION: CONDUCTED EXTENSIVE GRASSLANDS AND OAK WOODLAND MANAGMENT AND RESTORATION ACTIVITIES INCLUDING FRENCH BROOM AND OTHER WEED ERADICATION, SUDDEN OAK DEATH RESPONSE, PRESCRIBED BURNING AND A PILOT PROJECT USING ECOLOGICALLY MANAGED CATTLE GRAZING TO REDUCE THATCH AND PROMOTE GRASSLAND HEALTH. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DistributionToDonorInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 8 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/EscrowAccountInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 517230 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 34880 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 34880 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 5492 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 49427 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 54919 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/ProgramServicesAmt | 0 | 25918 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 25918 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 1873 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 166217 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 168090 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282FiledCnt | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 13 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 40.00 |
| 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/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | 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/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 30923 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | RON EASTMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | NANCY FORSTER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | WILLIAM GRABE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | TOM GRAY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | KAREN HARGROVE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JEFF LANGHOLZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MICHAEL MCCOURT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | TOM MCHENRY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | RICK RAYBURN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | SUSAN SIRKUS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | MIKE SUTTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | BARTON THOMPSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | BILL SHAW |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | CHRISTINA FISCHER |
| 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/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 6000 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 6000 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 134749 |
| 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/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Secretary |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Chairman |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | Executive Dir. |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/Form990TFiledInd | 0 | false |
| IRS990/FormationYr | 0 | 1994 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 110539 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 11 |
| IRS990/GovernmentGrantsAmt | 0 | 57723 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 770333 |
| IRS990/GrossReceiptsAmt | 0 | 2371989 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 10 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 4995 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 4995 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 4148 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 31230 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 35378 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 83 |
| IRS990/InterestGrp/TotalAmt | 0 | 83 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 745006 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 745006 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 27993425 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 28737996 |
| IRS990/InvestTaxExemptBondsInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 15 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 328064 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 408792 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 545253 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 873317 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 659794 |
| IRS990/LicensedMoreThanOneStateInd | 0 | false |
| 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 | PRESERVATION OF ~20,000 ACRES OF DIVERSE NATURAL LANDS AND OPEN SPACE THROUGH ADAPTIVE LAND MANAGEMENT, ECOLOGICAL RESEARCH AND RESTORATION, CONSERVATION EASEMENT STEWARDSHIP AND ENVIRONMENTAL EDUCATION PROGRAMS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 65235758 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 66819260 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 110539 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 110539 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 913517 |
| IRS990/NoncashContributionsAmt | 0 | 600000 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 7286 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 32868 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 40154 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 3090 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 10750 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 13840 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OnBehalfOfIssuerInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OrgFiledInLieuOfForm1041Ind | 0 | false |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 36268121 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 36868121 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | -8 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 19711 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 65988 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 85699 |
| IRS990/OtherExpensesGrp/Desc | 0 | SUPPLIES |
| IRS990/OtherExpensesGrp/Desc | 1 | VEHICLE EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | MEETING EXPENSE |
| IRS990/OtherExpensesGrp/Desc | 3 | SALES TAX |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 10135 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 1517 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 36783 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 16611 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 4550 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 36783 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 16611 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 10135 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 6067 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 40988 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 20000 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | COMPLIANCE INCOME |
| IRS990/OtherRevenueMiscGrp/Desc | 1 | REIMBURSED EXPENSES |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 0 | 2000 |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 1 | 16887 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 2000 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 1 | 16887 |
| IRS990/OtherRevenueTotalAmt | 0 | 18887 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 58803 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 196860 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 255663 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 6752 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 22605 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 29357 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 4554 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 15247 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 19801 |
| IRS990/PermanentlyRstrNetAssetsGrp/BOYAmt | 0 | 36268120 |
| IRS990/PermanentlyRstrNetAssetsGrp/EOYAmt | 0 | 36868120 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 22113 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 25771 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 21422 |
| IRS990/PrincipalOfficerNm | 0 | CHRISTINA FISCHER |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | COMPLIANCE AND ECOLOGICAL MONITORING: ANNUAL MONITORING OF PRIVATE LANDS AND CONSTRUCTION AREAS TO ENSURE COMPLIANCE WITH CONSERVATION EASEMENT TERMS AND ASSESS THE CONDITION OF SENSITIVE RESOURCES. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 181182 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | EDUCATION AND INTERPRETIVE ACCESS PROGRAMS: PROVIDED HIGH-QUALITY CURRICULUM DRIVEN OUTDOOR ENVIRONMENTAL EDUCATION PROGRAMS TO REGIONAL SCHOOL CHILDREN AGED 6 TO 16, WITH OVER 3,000 PARTICIPANTS. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 138831 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 8468 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 2839561 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 482033 |
| IRS990/PYOtherRevenueAmt | 0 | 27435 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 1946417 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 447014 |
| IRS990/PYTotalExpensesAmt | 0 | 929047 |
| IRS990/PYTotalRevenueAmt | 0 | 2875464 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 669993 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | true |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | true |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 593535 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 732881 |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/Contribution35ControlledInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionControllerInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionFamilyInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ControlledDisqualifiedPrsnInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnControllIntInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnOwnrIntInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ExcessBusinessHoldingsRulesInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/ListedByNameGoverningDocInd | 0 | true |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/LoanDisqualifiedPersonInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/OrganizationChangeSuprtOrgInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/PaymentSubstantialContribtrInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgNotOrganizedUSInd | 0 | false |
| IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgSectionC456Ind | 0 | false |