| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 66892 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 153697 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 1152530 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 334963 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | TO NURTURE A VIBRANT LOWER CAPE REGION BY PROMOTING ENVIRONMENTAL AND ECONOMIC SUSTAINABILITY, EXPANDING OPPORTUNITIES FOR LOW-AND MODERATE- INCOME RESIDENTS, AND PRESERVING OUR UNIQUE CULTURAL AND HISTORIC CHARACTER. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 3767 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 9417 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 24483 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 37667 |
| IRS990/AllOtherContributionsAmt | 0 | 1169501 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 1083 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 7967 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 50672 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 59722 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | KATHLEEN BOYCE |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5082900111 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 260 CRANBERRY HIGHWAY UNIT 1 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | ORLEANS |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02653 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 2501527 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 3421721 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | true |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 2522541 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 190354 |
| IRS990/CYOtherExpensesAmt | 0 | 1627818 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 1072153 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 402248 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 1754982 |
| IRS990/CYTotalExpensesAmt | 0 | 3382800 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 214433 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 3785048 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 92501 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 3773 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 11320 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 362234 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 377327 |
| IRS990/Desc | 0 | HOUSING ADVOCACY PROGRAM TO WORK WITH TOWNS ON THE LOWER CAPE TO CREATE MORE OPPORTUNITIES FOR AFFORDABLE HOUSING FOR YEAR ROUND RESIDENTS AND A FIRST TIME HOMEBUYERS PROGRAM TO PROVIDE EDUCATION TO YEAR ROUND RESIDENTS AT OR BELOW 80% OF MEDIUM INCOME. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | true |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DoingBusinessAsName/BusinessNameLine1Txt | 0 | COMMUNITY DEVELOPMENT PARTNERSHIP |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 867500 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 812258 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | true |
| IRS990/EmployeeCnt | 0 | 20 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 2615102 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 2925 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 15212 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 40372 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 58509 |
| IRS990/FeesForServicesLegalGrp/FundraisingAmt | 0 | 423 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 2197 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 5830 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 8450 |
| IRS990/FeesForServicesManagementGrp/FundraisingAmt | 0 | 2188 |
| IRS990/FeesForServicesManagementGrp/ManagementAndGeneralAmt | 0 | 11376 |
| IRS990/FeesForServicesManagementGrp/ProgramServicesAmt | 0 | 30191 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 43755 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 2413 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 12549 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 33305 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 48267 |
| 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 | 37.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 4.00 |
| 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/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 14 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 15 | 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/OfficerInd | 5 | 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | JAY COBURN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | CAROLE RIDLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | JENNIFER CUSACK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | PAUL RUCHINSKAS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | MATT COLE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | POLLY BRYSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | ANDREW FOSS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | MARY KAY LEONARD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | DAVID KOVEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | ROBERT MACCREADY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | AARON POLHEMUS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | MARIN REINHARDT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | RAPHAEL RICHTER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | KRISTY SENATORI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | ANDREW STERN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | STEVE COLE |
| 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 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/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/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | CLERK |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | IMMEDIATE PA |
| 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 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | BOARD CHAIR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormationYr | 0 | 1992 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 189778 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 15 |
| IRS990/GovernmentGrantsAmt | 0 | 1353040 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 198894 |
| IRS990/GrossReceiptsAmt | 0 | 3794164 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 15 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 816 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 7345 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 73450 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 81611 |
| IRS990/InterestGrp/FundraisingAmt | 0 | 868 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 1737 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 84229 |
| IRS990/InterestGrp/TotalAmt | 0 | 86834 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 600000 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 600000 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 576 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 576 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 35 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 5350384 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 6099816 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 5625138 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 10975522 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/OtherAmt | 0 | 9116 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | true |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | TO NURTURE A VIBRANT LOWER CAPE REGION BY PROMOTING ENVIRONMENTAL AND ECONOMIC SUSTAINABILITY, EXPANDING OPPORTUNITIES FOR LOW-AND MODERATE- INCOME RESIDENTS, AND PRESERVING OUR UNIQUE CULTURAL AND HISTORIC CHARACTER. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 7713379 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 7464745 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 3124502 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 3317569 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | -9116 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 189778 |
| IRS990/NetGainOrLossInvestmentsGrp/UnrelatedBusinessRevenueAmt | 0 | 198894 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 2257002 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 2505311 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 1061 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 5306 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 145767 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 152134 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 16155 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 20507 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 52759 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 89421 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 155201 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 654935 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | -209181 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 21978 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 54946 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 142859 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 219783 |
| IRS990/OtherExpensesGrp/Desc | 0 | HARBOR HILL REIMBURSABLES |
| IRS990/OtherExpensesGrp/Desc | 1 | SPECIAL PROGRAM |
| IRS990/OtherExpensesGrp/Desc | 2 | REPAIRS AND MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 3 | GRANT SHARING EXPENDITURE |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 3464 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 9238 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 199466 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 193925 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 102773 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 40422 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 199466 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 193925 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 115475 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 40422 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 171459 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 148200 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 138550 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 346376 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 900577 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 1385503 |
| IRS990/OthNotesLoansReceivableNetGrp/BOYAmt | 0 | 499327 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 458182 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 11497 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 28743 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 74732 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 114972 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 3472 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 8681 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 22571 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 34724 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 67831 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 81773 |
| IRS990/PrincipalOfficerNm | 0 | JAY COBURN |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 624200 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PROGRAM INCOME |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1072153 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 1072153 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | HOUSING RENTAL PROGRAMS - MANAGES 72 AFFORDABLE RENTAL HOMES ACROSS LOWER CAPE COD, INCLUDING STUDIOS TO 3 BEDROOMS, STAND-ALONES TO MULTI-FAMILY PROVIDING HOUSING FOR 140 PEOPLE. ADDITIONALLY, THE PROGRAM MANAGES 28 UNITS OF MARKET RATE (NOT AFFORDABLE UNITS) STUDIOS TO THREE BEDROOM. PROVIDING HOUSING FOR 54 PEOPLE. |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | BUSINESS DEVELOPMENT - PROVIDING ACCESS TO CAPITAL THROUGH MICRO LOANS, OFFERING ONE-ON-ONE GUIDANCE AND EDUCATIONAL WORKSHOPS AND SUPPORTING LOCAL FISHING/SHELLFISHING BUSINESSES WITH EXPERTISE. |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 0 | OTHER HOUSING PROGRAMS |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 3662193 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 2080 |
| IRS990/PYOtherExpensesAmt | 0 | 1990248 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 1052635 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 1032505 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 1694155 |
| IRS990/PYTotalExpensesAmt | 0 | 3684403 |
| IRS990/PYTotalRevenueAmt | 0 | 4716908 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 402248 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | true |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 2522541 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 3662193 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2327490 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1989090 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 2598295 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 13099609 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 576 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 2080 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 6824 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 15067 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 13141 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 37688 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 4940773 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.99710 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.99670 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 13099609 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 2522541 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 3662193 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2327490 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1989090 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 2598295 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 13099609 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 13137297 |
| 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 | true |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 4448579 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 5295070 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 9743649 |