| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 2706670 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 6705009 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 273731 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 441180 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | TO PROVIDE EXCELLENT HOUSING AND HEALTH CARE SERVICES TO ITS RESIDENTS. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 28614 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 28614 |
| IRS990/AllOtherContributionsAmt | 0 | 55537 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 76010 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 50979 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 126989 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | MARTIN J CONLEY III CFO |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6033710431 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 150 RIVERMEAD RD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | PETERBOROUGH |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | NH |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 03458 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 8238 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 5586 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 8 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 475919 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 475919 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 8932764 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 633543 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 503688 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 410497 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 4 | 213340 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 810 TURNPIKE RD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 1600 MARKET ST STE 1702 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 1000 WASHINGTON ST STE 510 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 250 VALLEYBROOK DR |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 4 | PO BOX 56346 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | NEW IPSWICH |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | PHILADELPHIA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | BOSTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | LANCASTER |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 4 | ATLANTA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | NH |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | PA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | PA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 4 | GA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 03071 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 19103 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 021182798 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 17601 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 4 | 30343 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | HUTTER CONSTRUCTION CORPORATION |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | EVENTUS STRATEGIC LLC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | UNIDINE CORPORATION |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 3 | RLPS ARCHITECTS |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 4 | HUNTER NORTH ASSOCIATES LLC |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | CONSTRUCTION SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | DEVELOPMENT CONSULTANTS |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | DINING SERVICES MANAGEMENT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | ARCHITECTURE SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 4 | SECURITY SERVICES |
| IRS990/CreditCounselingInd | 0 | 1 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 55537 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 84945 |
| IRS990/CYInvestmentIncomeAmt | 0 | 641344 |
| IRS990/CYOtherExpensesAmt | 0 | 10781201 |
| IRS990/CYOtherRevenueAmt | 0 | 293929 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 19328355 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -1098458 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 10551477 |
| IRS990/CYTotalExpensesAmt | 0 | 21417623 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 20319165 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 60867053 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 64880163 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 23747 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 2731524 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 2755271 |
| IRS990/Desc | 0 | INDEPENDENT LIVING:RIVERMEAD HAS 157 INDEPENDENT LIVING RESIDENCES AVAILABLE FOR INDIVIDUALS AGED 62 AND OLDER. THESE RESIDENCES ARE AVAILABLE UNDER A LIFECARE CONTRACT, WHICH GUARANTEES RESIDENTS ACCESS TO ASSISTED LIVING, MEMORY SUPPORT, AND SKILLED NURSING CARE WITH NO SIGNIFICANT CHANGE IN THEIR MONTHLY FEES AS THEY MOVE BETWEEN LEVELS OF CARE. RIVERMEAD HAS NEVER TERMINATED A RESIDENCE AND SERVICES AGREEMENT SOLELY BASED UPON A RESIDENT'S INABILITY TO PAY HIS OR HER MONTHLY FEE IN FULL. RIVERMEAD PROVIDED $72,736 IN CHARITABLE ASSISTANCE TO RESIDENTS IN 2018.CONTINUED ON SCHEDULE "O".HEALTH CARE SERVICES: RIVERMEAD HAS 49 ASSISTED LIVING RESIDENCES, 17 MEMORY SUPPORT RESIDENCES, 33 SKILLED NURSING RESIDENCES, AND A HOME HEALTH PROGRAM.PROGRAMS & AMENITIES:RIVERMEAD IS COMMITTED TO PROVIDING QUALITY PROGRAMS, SERVICES, AND AMENITIES TO ENRICH RESIDENTS' LIVES INCLUDING: EXCEPTIONAL DINING EXPERIENCES, THERAPY SERVICES, HOUSEKEEPING, MAINTENANCE SERVICES, A WELLNESS CENTER, AN INDOOR POOL, TRANSPORTATION, TWO LIBRARIES, A MOVIE THEATER, A WOODWORKING SHOP, A GREEN HOUSE, AN ART GALLERY, WALKING TRAILS, CROQUET COURTS, BOCCE COURTS, AND RAISED GARDEN BEDS. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DoingBusinessAsName/BusinessNameLine1Txt | 0 | RIVERMEAD |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 378 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/EscrowAccountInd | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/BOYAmt | 0 | 6836 |
| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 10784 |
| IRS990/ExpenseAmt | 0 | 19358574 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 89765 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 89765 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 12733 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 12733 |
| IRS990/FeesForServicesLobbyingGrp/ManagementAndGeneralAmt | 0 | 2017 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 2017 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 50441 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 1087075 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 1137516 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 62695 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 62695 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| 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/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 4 | X |
| 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/IndividualTrusteeOrDirectorInd | 16 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 17 | 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/OfficerInd | 6 | 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/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 39042 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 19 | 32952 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 28286 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 29119 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 472 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 34871 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 27592 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | CHRISTOPHER J FLYNN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | GEORGE FOOTE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | SUSAN PETERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | J RODERICK FALBY JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | CARL JOHNSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | CHRISTOPHER BROWN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | ANDREW MANNS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | ANNE PEIRCE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | JANET S GRANT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | RICHARD HANCE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | DEBORAH ROODY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | JOHN H MORISON III |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | CONSTANCE CONNIE G OLIVER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | PETER W LEBERMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | JOHN ROUND |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | CALVIN SHOLL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | MICHAEL J RAFFERTY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | RICHARD P CHURCH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | WILLIAM H JAMES JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | MARTIN J CONLEY III |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | JAN D EATON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | ERIN JABOLONSKI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | ANN E NUNN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | DOUGLAS SHARP |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | DIANNE TISDALE |
| 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/ReportableCompFromOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 251630 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 19 | 152295 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 162294 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 121902 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 118742 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 114909 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 104955 |
| 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/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | ASST. SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | TRUSTEE (UNTIL 12/13/2018) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | TRUSTEE (UNTIL 12/13/2018) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | TRUSTEE (UNTIL 12/13/2018) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | CHIEF EXECUTIVE OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | CHIEF FINANCIAL OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | DIR. MARKETING/RESIDENT SVC |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | DIRECTOR OF HEALTH SERVICES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | HEALTH SVCS. ADMINISTRATOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | DIRECTOR OF FACILITIES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | DIRECTOR OF HUMAN RESOURCES |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1991 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 93828 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 15 |
| IRS990/GrantAmt | 0 | 84945 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 80565 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 80565 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 4380 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 4380 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 22213553 |
| IRS990/GrossReceiptsAmt | 0 | 42465911 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 29363 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 15 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 7 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 254369 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 254369 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 14544 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 128247 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 142791 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 15715 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 1814454 |
| IRS990/InterestGrp/TotalAmt | 0 | 1830169 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 44571 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 59589 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 547516 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 547516 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 21774261 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 23371502 |
| IRS990/InvestTaxExemptBondsInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 74 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 31860189 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 51220889 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 60500498 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 92360687 |
| IRS990/LegalDomicileStateCd | 0 | NH |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 22119725 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 27021 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 1 |
| 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/MiscellaneousRevenueGrp/ExclusionAmt | 0 | 88526 |
| IRS990/MiscellaneousRevenueGrp/TotalRevenueColumnAmt | 0 | 88526 |
| IRS990/MissionDesc | 0 | RIVERMEAD IS A PROGRESSIVE NOT-FOR-PROFIT CONTINUING CARE RETIREMENT COMMUNITY THAT ADVOCATES FOR AN ENRICHED LIFESTYLE WITH CULTURAL AND EDUCATIONAL OPPORTUNITIES. CONTINUED ON SCHEDULE "O".WE CONTINUOUSLY STRIVE TO PROVIDE HIGH-QUALITY, HOLISTIC LIFECARE PROGRAMS, AND HEALTHCARE SERVICES IN A FINANCIALLY RESPONSIBLE MANNER. IN SERVING THIS COMMITMENT, WE SEEK TO PROVIDE A POSITIVE AND SUPPORTIVE WORK ENVIRONMENT. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 82143 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 39286 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | -19488716 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | -22293119 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 93828 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 93828 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 2342 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 2342 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -1417285 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 2208284 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 2208284 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 142186 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 494685 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 636871 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OnBehalfOfIssuerInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 1742746 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 1036573 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 379859 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 75702 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 1225244 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 1300946 |