| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 1533564 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1692577 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 1430390 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 1005865 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | THE MISSION OF MONTGOMERY PLACE IS TO ENHANCE THE QUALITY OF LIFE FOR SENIOR ADULTS BY PROVIDING RETIREMENT HOUSING AND HEALTH SERVICES IN A NURTURING ENVIRONMENT THAT SUPPORTS EACH RESIDENT. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 341409 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 341409 |
| IRS990/AllOtherContributionsAmt | 0 | 71375 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 23110 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 976158 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 999268 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | ARTHUR CARR CFO |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 7737534100 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 5550 SOUTH SHORE DRIVE |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | CHICAGO |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | IL |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 60637 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 422955 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 684791 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 5 |
| IRS990/CollectionsOfArtInd | 0 | 1 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 439859 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 439859 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 1 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 826446 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 304477 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 296824 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 113753 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 4 | 103130 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 536 OLD HOWELL ROAD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | PO BOX 10425 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 77 W WACKER DR SUITE 3100 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 207 WEST FRANKLIN STREET |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 4 | 225 W WACKER DR SUITE 2600 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | GREENVILLE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | CHICAGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | CHICAGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | RICHMOND |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 4 | CHICAGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | SC |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | IL |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | IL |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | VA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 4 | IL |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 29615 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 60610 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 60601 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 23220 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 4 | 60606 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | HEALTHPRO REHABILITATION |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | SHEILA KING MARKETING & PUBLIC RELATIONS |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | GREENBERG TRAURIG LLP |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 3 | SB&A |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 4 | CROWE LLP |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | THERAPY SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | MARKETING AND PUBLIC RELATIONS |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | LEGAL SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | MARKETING SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 4 | ACCOUNTING SERVICES |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 71375 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 334901 |
| IRS990/CYOtherExpensesAmt | 0 | 9924884 |
| IRS990/CYOtherRevenueAmt | 0 | 246039 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 16758568 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -1584943 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 9070942 |
| IRS990/CYTotalExpensesAmt | 0 | 18995826 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 17410883 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 1666741 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 2144273 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 33473 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 2233524 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 2266997 |
| IRS990/Desc | 0 | MONTGOMERY PLACE IS A LIFE PLAN CONTINUING CARE RETIREMENT COMMUNITY. RESIDENTS ARE OFFERED MULTIPLE OPTIONS IN INDEPENDENT LIVING APARTMENT SELECTION (VIEWS AND PRICES), VARYING MEAL PLANS, RESIDENT-DRIVEN DAILY ACTIVITIES AND OUTINGS. APARTMENTS INCLUDE FULL KITCHENS AND APPLIANCES, INCLUDING IN-UNIT WASHER/DRYERS. COMMON LIVING SPACES (BOTH IN THE BUILDING AND THE PARK-LIKE OUTDOORS SPACE) ENCOURAGE COMPANIONSHIP AND SATISFACTION OF PHYSICAL, INTELLECTUAL AND PSYCHOLOGICAL NEEDS. NOTABLE SERVICES AND AMENITIES INCLUDE COMPLIMENTARY WELLNESS SERVICES, BASIC PHONE, CABLE AND INTERNET, LIGHT HOUSEKEEPING/LINEN, ENTERTAINMENT AND TRANSPORTATION SERVICES, 24-HOUR LIVE SECURITY, CALL SYSTEM IN EACH UNIT, AND ON-SITE CHAPLAIN SERVICES. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 1 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 384 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/EscrowAccountInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 3441438 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 121697 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 121697 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 251942 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 251942 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 102589 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 224884 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 327473 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 13 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 14 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 15 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 16 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 7.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| 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 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 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/IndividualTrusteeOrDirectorInd | 13 | 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/OfficerInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 8 | 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 | 13306 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 4524 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | MICHAEL M MCGARRY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | GREGORY L GLEASON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | DR CONSTANCE BONBREST |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JOHN JUROE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | DEBORAH C FRANCZEK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | HELEN M JOHNSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MARGO BROOKS-PUGH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | SUZANNE DUTCHER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | DOUG HOFFMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | SUSAN LEVY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | DR CYNTHIA LINDER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | DR BRYON ROSNER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | JOHN SEGAL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | SCOTT WILLIAMSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | DEBORAH HART |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | FRED SAVIANO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | ARTHUR CARR |
| 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 | 252391 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 130496 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 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/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE PRESIDENT (BEG. 1/2018) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | VICE PRESIDENT (THRU 12/2017) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TREASURER (THRU 12/18) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | SECRETARY (BEG. 1/2018) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | SECRETARY (THRU 8/2017) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | BOARD MEMBER (THRU 12/2017) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | CEO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | CFO (THRU 12/2017) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | CFO (BEG 2/2018) |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1987 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | -19052 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 12 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 17560854 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 227029 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 12 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 54928 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 185381 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 240309 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 75211 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 162014 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 237225 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 1684110 |
| IRS990/InterestGrp/TotalAmt | 0 | 1684110 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 353953 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 353953 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 109375 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 118750 |
| IRS990/InvestmentsProgramRelatedGrp/BOYAmt | 0 | 6551416 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 6404960 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 8860133 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 8951455 |
| IRS990/InvestTaxExemptBondsInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 84 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 35075187 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 22056382 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 21072869 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 56148056 |
| IRS990/LegalDomicileStateCd | 0 | IL |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 19052 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 130919 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MiscellaneousRevenueGrp/ExclusionAmt | 0 | 30863 |
| IRS990/MiscellaneousRevenueGrp/TotalRevenueColumnAmt | 0 | 30863 |
| IRS990/MissionDesc | 0 | THE MISSION OF MONTGOMERY PLACE IS TO ENHANCE THE QUALITY OF LIFE FOR SENIOR ADULTS BY PROVIDING RETIREMENT HOUSING AND HEALTH SERVICES IN A NURTURING ENVIRONMENT THAT SUPPORTS EACH RESIDENT. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | -21087038 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | -22725390 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | -19052 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | -19052 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 70494 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 96110 |
| IRS990/NetRentalIncomeOrLossGrp/UnrelatedBusinessRevenueAmt | 0 | 25616 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -53409 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 79810 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 447465 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 527275 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OnBehalfOfIssuerInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 613372 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 1205231 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 172889 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 673212 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 846101 |
| IRS990/OtherExpensesGrp/Desc | 0 | FOOD |
| IRS990/OtherExpensesGrp/Desc | 1 | ANCILLARY |
| IRS990/OtherExpensesGrp/Desc | 2 | REPAIRS & MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 3 | SUPPLIES |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 86709 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 53057 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 41085 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 1016555 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 1072955 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 411681 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 171567 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 1103264 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 1072955 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 464738 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 212652 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 28724527 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 29169831 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 1 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 2 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | RESIDENT GARAGE |
| IRS990/OtherRevenueMiscGrp/Desc | 1 | CAFE LIBRARY |
| IRS990/OtherRevenueMiscGrp/Desc | 2 | MANAGEMENT FEE |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 0 | 70865 |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 1 | 30201 |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 2 | 18000 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 70865 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 1 | 30201 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 2 | 18000 |
| IRS990/OtherRevenueTotalAmt | 0 | 149929 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 1036622 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 5976227 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 7012849 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 133260 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 638873 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 772133 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 234411 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 177263 |
| IRS990/PrincipalOfficerNm | 0 | DEBORAH E HART |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 623000 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 623000 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 623000 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 3 | 623000 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 4 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | INDEPENDENT LIVING |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | HEALTH CARE |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | HOME CARE |