| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 3671499 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 3465891 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 1972568 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 1848607 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | SEE SCHEDULE O. |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | JOHN T SZUM |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6176671700 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 109 BROOKLINE AVENUE SUITE 300 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BOSTON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02215 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 1659207 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 1406659 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 1 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 1045291 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 1045291 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 2090582 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 25344 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 25344 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 1 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 7885362 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 813500 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 461496 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 330 BROOKLINE AVENUE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 550 SOUTH HOPE ST STE 1500 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | PO BOX 844736 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | BOSTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | LOS ANGELES |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | DALLAS |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | TX |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 02215 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 90071 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 752844736 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | BETH ISRAEL DEACONESS MEDICAL CENTER |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | KPMG LLP |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | DELOITTE & TOUCHE |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | PAYROLL & BENEFITS |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | ACCOUNTING |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | ACCOUNTING |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 0 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 510945 |
| IRS990/CYOtherExpensesAmt | 0 | 9029696 |
| IRS990/CYOtherRevenueAmt | 0 | 5658982 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 10559866 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -60236 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 7760333 |
| IRS990/CYTotalExpensesAmt | 0 | 16790029 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 16729793 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | SEE SCHEDULE O. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 24 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/EscrowAccountInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 14808123 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 1 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 730948 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 730948 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 205667 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 205667 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 819545 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 819545 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 7.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 58.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 63.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 13 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 14 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 15 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 16 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 17 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 18 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 19 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 20 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 21 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 22 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| 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 | 5.00 |
| 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 | 24.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 65.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 60.00 |
| 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/KeyEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | 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 | 26979 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 82720 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 45118 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 142827 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 87099 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 47269 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 19 | 287299 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 49456 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 45169 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 39289 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | BARKER ESQ THOMAS R |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | BUFFERD ALLAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | CANEPA JOHN J |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | DOWN JAMES W |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | GREEN ESQ KAREN F |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | HESTNES ESQ HAROLD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | JICK DANIEL J |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | MALONEY RICHARD J |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | NICHOLS PETER B |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | NORKUS MICHAEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | SPIVAK MD BARBARA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | STEVENSON HOWARD H |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | STEVENSON MD PHD MARY ANN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | STRIEDER HELEN R |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | WILKINS JOHN P |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | ROBLE DANIEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | SZUM JOHN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | MONCREIFF JANE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | APPLEYARD JOSEPH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | CLOUGH JEANETTE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | DONOVAN SHAWN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | SAMUELS ALIZA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | SCHWAB VALBONA |
| 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 | 319082 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 576716 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 918739 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 239074 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 19 | 1274811 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 523281 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 434359 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 367919 |
| 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 | 239920 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 665958 |
| 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 | 4965904 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | DIRECTOR (EX-OFFICIO) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR (EX-OFFICIO) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | DIRECTOR (EX-OFFICIO) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DIRECTOR (EX-OFFICIO) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR & BOARD CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR (EX-OFFICIO) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | VP, GENERAL COUNSEL, CLERK |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | EVP, CFO, TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | SVP & CHIEF INVESTMENT OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | DIRECTOR OF FINANCE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | PRESIDENT/CEO, MT AUBURN HOSP |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | VP MARKETABLE SECURITIES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | VP MARKETABLE SECURITIES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | VP MARKETABLE SECURITIES |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1984 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 525764 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 8 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 525764 |
| IRS990/GrossReceiptsAmt | 0 | 16729793 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 8 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 14 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartVInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 4091039 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 4091039 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 2311387 |
| IRS990/InterestGrp/TotalAmt | 0 | 2311387 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | -10800 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | -14819 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | -4019 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 11050813 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 11150686 |
| IRS990/InvestTaxExemptBondsInd | 0 | 1 |
| IRS990/IRPDocumentCnt | 0 | 10 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 0 |
| 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/MissionDesc | 0 | SEE SCHEDULE O. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 12899077 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 13019474 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 521337 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 525764 |
| IRS990/NetGainOrLossInvestmentsGrp/UnrelatedBusinessRevenueAmt | 0 | 4427 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | -11414 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -6486 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 377631 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 377631 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 54219 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 54219 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OnBehalfOfIssuerInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 757074 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 904730 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 187119 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 957271 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 957271 |
| IRS990/OtherExpensesGrp/Desc | 0 | DUES AND SUBSCRIPTIONS |
| IRS990/OtherExpensesGrp/Desc | 1 | OTHER |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 210002 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 57518 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 210002 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 57518 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 523000 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | INVESTMENT MANAGEMENT |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2301992 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 5658982 |
| IRS990/OtherRevenueMiscGrp/UnrelatedBusinessRevenueAmt | 0 | 3356990 |
| IRS990/OtherRevenueTotalAmt | 0 | 5658982 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 3983236 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 3983236 |
| IRS990/OthNotesLoansReceivableNetGrp/BOYAmt | 0 | 71130000 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 221632 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 221632 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 507612 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 507612 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 1130914 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 1174683 |
| IRS990/PrincipalOfficerNm | 0 | JOHN T SZUM |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | MANAGEMENT SERVICE FEE |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | POOL LOAN PROGRAM |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 8248479 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 2311387 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 8248479 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 2311387 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 0 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 455434 |
| IRS990/PYOtherExpensesAmt | 0 | 10102051 |
| IRS990/PYOtherRevenueAmt | 0 | 4877492 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 11585463 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -131885 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 6948223 |