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| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 84596 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 178799 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 126989 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | Save The Bay protects and restores San Francisco Bay for people and wildlife by re-establishing tidal marsh, preventing development and fill, improving Bay water qualify, and building an effective constituency of Bay supporters. |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 55354 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 55354 |
| IRS990/AllAffiliatesIncludedInd | 0 | false |
| IRS990/AllOtherContributionsAmt | 0 | 2857858 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 3115 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 16949 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 16696 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 36760 |
| IRS990/AmendedReturnInd | 0 | X |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | Robin Erickson |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5104636850 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1 | 0 | 1330 Broadway 1800 |
| IRS990/BooksInCareOfDetail/USAddress/City | 0 | Oakland |
| IRS990/BooksInCareOfDetail/USAddress/State | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCode | 0 | 94612 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
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| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 223600 |
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| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 99972 |
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| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 246258 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1 | 0 | 2000 15th St N |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/City | 0 | Arlington |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/State | 0 | VA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCode | 0 | 22201 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1 | 0 | Chapman Cubine Adams Hussey |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | consulting services |
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| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 8500 |
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| IRS990/CYRevenuesLessExpensesAmt | 0 | -504157 |
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| IRS990/CYTotalExpensesAmt | 0 | 3727635 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 813993 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 230055 |
| IRS990/CYTotalRevenueAmt | 0 | 3223478 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
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| IRS990/DeductibleNonCashContriInd | 0 | true |
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| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
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| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 2325 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 15322 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 20059 |
| IRS990/Desc | 0 | Restoration Campaigns - We supported the research and outreach efforts of the San Francisco Bay Restoration Authority, a regional agency pursuing public funding for wetland restoration. Save The Bay is working with partners to re-establish 100,000 acres of restored tidal marsh habitat around San Francisco Bay, through policy measures and a strong science-based program that enlists volunteers to replant key sites with native vegetation. Our Community-based Restoration Program assists federal, state and local landowners of shoreline parcels to improve vital wetland habitat for endangered species and adapt the shoreline to climate change, including ecotone transition areas at former salt ponds in Hayward and Menlo Park, and at shoreline sites in Corte Madera, Oakland and Palo Alto. Participants engage in (continued on Schedule O) |
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| IRS990/DistributionToDonorInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 45 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/EscrowAccountInd | 0 | false |
| IRS990/ExcessBusinessHoldingsInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 1120889 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 47503 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 47503 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 14870 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 14870 |
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| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 266877 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 280044 |
| IRS990/FeesForServicesProfFundraising/FundraisingAmt | 0 | 230055 |
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| IRS990/ForeignActivitiesInd | 0 | false |
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| IRS990/Form8899Filedind | 0 | false |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.00 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 13 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 14 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 15 | 0.00 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 35.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 40.00 |
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| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
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| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
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| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 6954 |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Donnie Fowler |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Michael Katz |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Sandy Linder |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | Maureen Reilly |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Ron Gonzales |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Lisa Hoyos |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | Samuel Luoma |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | Christoper Richard |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | Paul Stone |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | Stephen Thompson |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | Sinclair White |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | Robin Erickson |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | David Lewis |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | Stephen Knight |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | Janine Kraus |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 143000 |
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| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Int Affairs |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | External Affair |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | External Affair |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | CFO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | Exec Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | Political Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | Chief Strategy |
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| IRS990/Form990TFiledInd | 0 | false |
| IRS990/FormationYr | 0 | 1964 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
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| IRS990/FSAuditedInd | 0 | true |
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| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 12 |
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| IRS990/GrantAmt | 0 | 4500 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 8500 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 8500 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 3223478 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
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| IRS990/IndependentAuditFinclStmtInd | 0 | false |
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| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/IndoorTanningServicesInd | 0 | false |
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| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 25155 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 133262 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 179537 |
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| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 3990 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 10662 |
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| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 9529 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
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| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 732403 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
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| IRS990/InvestTaxExemptBondsInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 21 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
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| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 109720 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 249999 |
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| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | true |
| 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 | We engage more than 40,000 supporters, advocates and volunteers to protect the Bay, and inspire the next generation of environmental leaders by educating thousands of students annually. |
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| IRS990/MoreThan5000KToOrgInd | 0 | false |
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| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
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| IRS990/NondeductibleContributionsInd | 0 | true |
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| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 27079 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 104005 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 159173 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 1740 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 1681 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 18904 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 22325 |
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| IRS990/OnBehalfOfIssuerInd | 0 | false |
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| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
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| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 16894 |
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| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 19273 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 90148 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 133888 |
| IRS990/OtherExpensesGrp/Desc | 0 | Printing and Publications |
| IRS990/OtherExpensesGrp/Desc | 1 | Postage and Shipping |
| IRS990/OtherExpensesGrp/Desc | 2 | Miscellenous expense |
| IRS990/OtherExpensesGrp/Desc | 3 | Dues, licenses, service fees |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 36169 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 18096 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 7493 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 3 | 4662 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 4717 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 629 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 3700 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 2286 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 98884 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 36371 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 22649 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 14875 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 139770 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 55096 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 33842 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 21823 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 175247 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 134552 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | Other |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2508 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 2508 |
| IRS990/OtherRevenueTotalAmt | 0 | 2508 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 364339 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 247649 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 1183541 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 1795529 |
| IRS990/OtherWebsiteInd | 0 | X |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/OwnWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 31632 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 27362 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 104790 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 163784 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 3786 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 3758 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 13467 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 21011 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 543000 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 851250 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 27121 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 28758 |
| IRS990/PrincipalOfficerNm | 0 | David Lewis |
| IRS990/ProfessionalFundraisingInd | 0 | true |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | Education and Outreach - Save The Bay provided information on San Francisco Bay and actively engaged the general public and our members to advance our mission, through mail and email communications, social networking, educational events and volunteer opportunities. Thousands of people accessed educational information about the Bay on our enhanced web site, and we introduced many individuals and businesses to the Bay through our expanded calendar of events. Our presence in the regional news media remains high, with significant print, radio and television coverage of our work on many issues, and on our education and restoration programs. Interest and participation in the organization continues to grow, with more than 50,000 members and supporters. We continue to upgrade our technology to improve the effectiveness (continued on Schedule O) |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 884883 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | Bay Protection - Save The Bay provided information to local and regional residents about threats to fill in more of the bay for development on restorable salt ponds in Redwood City, and on diked historic Baylands in Newark. We provided information to state and federal agencies regarding applicable regulations and policies, including sea level rise and adaptation to climate change. Save The Bays Clean Bay Project helped to reduce Bay pollution from cities and neighborhoods encouraging municipalities throughout the region to adopt pollution prevention best practices. Our work with municipalities significantly reduced distribution of single-use plastic bags and polystyrene food packaging, two of the largest components of trash entering the bay through stormwater. We are monitoring cities progress complying with new regulatory requirements to reduce trash entering the Bay through storm water. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 358003 |
| IRS990/ProgSrvcAccomActy3Grp/GrantAmt | 0 | 4000 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 3724908 |