| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 2855291 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 3388578 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 399844 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 517406 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | DEAN COLLEGE IS A PRIVATE, RESIDENTIAL NEW ENGLAND COLLEGE GROUNDED IN A CULTURE AND TRADITION THAT ALL STUDENTS DESERVE THE OPPORTUNITY FOR ACADEMIC AND PERSONAL SUCCESS. A UNIQUELY SUPPORTIVE COMMUNITY FOR MORE THAN 150 YEARS, DEAN HAS WOVEN TOGETHER EXTENSIVE STUDENT SUPPORT AND ENGAGEMENT WITH EXCEPTIONAL TEACHING AND INNOVATIVE CAMPUS ACTIVITIES. OUR GRADUATES ARE LIFETIME LEARNERS WHO THRIVE IN THEIR CAREERS, EMBRACE SOCIAL RESPONSIBILITY AND DEMONSTRATE LEADERSHIP. THIS IS THE DEAN DIFFERENCE. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 208566 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 1349608 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 1558174 |
| IRS990/AllOtherContributionsAmt | 0 | 1941083 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | DANIEL MODELANE |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 5085411614 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 99 MAIN STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | FRANKLIN |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02038 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 1 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 3917778 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 3840979 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 6 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 151138 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 793190 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 944328 |
| IRS990/CompDisqualPersonsGrp/ProgramServicesAmt | 0 | 91533 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 91533 |
| 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 | 259624 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 253085 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 189330 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 157394 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 4 | 151601 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 1920 E PARHAM RD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 77 NORTH WASHINGTON ST |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 30 CLIPPER RD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | PO BOX 6002 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 4 | 111 HUNTINGTON AVE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | RICHMOND |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | BOSTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | WEST CONSHOHOCKEN |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | HOLLISTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 4 | BOSTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | VA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | PA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 4 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 23229 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 02144 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 19428 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 01746 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 4 | 02199 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | ROYALL & COMPANY |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | CTP CONOVER ADVERTISING COMPANY |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | WHITEBOARD COMMUNICATIONS |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 3 | NE PROFESSIONAL SERVICE |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 4 | LOCKE LORD |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | ENROLLMENT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | ADVERTISING |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | ENROLLMENT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | MAILING |
| IRS990/ContractorCompensationGrp/ServicesDesc | 4 | LEGAL |
| IRS990/ContriRptFundraisingEventAmt | 0 | 64769 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 2219326 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 21736355 |
| IRS990/CYInvestmentIncomeAmt | 0 | 361915 |
| IRS990/CYOtherExpensesAmt | 0 | 20305410 |
| IRS990/CYOtherRevenueAmt | 0 | 8442 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 56651833 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -807022 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 18006773 |
| IRS990/CYTotalExpensesAmt | 0 | 60048538 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1615088 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 59241516 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 943814 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 917480 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 96416 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 179057 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 3471216 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 3746689 |
| IRS990/Desc | 0 | INSTRUCTION: THE COLLEGE HAD FULL-TIME ENROLLMENT OF 1,100 AND PART-TIME ENROLLMENT OF 269. THE STUDENTS ARE FROM ALL OVER THE WORLD AND NUMEROUS FOREIGN COUNTRIES. THE COLLEGE OFFERS 21 ASSOCIATE AND 13 BACHELOR DEGREES. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 783 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/EscrowAccountInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 32200806 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditPerformedInd | 0 | 1 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 1 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 99655 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 99655 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 153072 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 153072 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 301095 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 306832 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 1281771 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 1889698 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignGrantsGrp/ProgramServicesAmt | 0 | 42200 |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 42200 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| 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 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 55.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 26 | 50.00 |
| 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/IndividualTrusteeOrDirectorInd | 18 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 19 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 20 | 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/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 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 155244 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 31303 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 18313 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 16959 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 31919 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 27168 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 26 | 32216 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | MARK BOYCE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | JAN KOKES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | JOSEPH MAHER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | EDWARD AUGUSTUS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | SCOTT COLWELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JEFFREY P COHEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MICHAEL COSTA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | BETTY-JO CUGINI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | DONNA CUSSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | RUTH DUGAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | ANDRES FERNANDEZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | WILLIAM GREEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | CHRISTOPHER HENNESSEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | PETER HEXTER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | DAVID HOFFIS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | MICHAEL JONES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | STEPHEN LINCOLN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | DOMINIC ORR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | SUSAN PERMUT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | THERESA ROBBINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | DR PAULA M ROONEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | DANIEL MODELANE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | GARY CONVERTINO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | MICHAEL FISHBEIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | CINDY KOZIL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | DARRELL KULESZA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 26 | COLEEN RESNICK |
| 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 699457 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 172153 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 164435 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 163316 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 172442 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 173334 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 26 | 160265 |
| 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/ReportableCompFromRltdOrgAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | CHAIRMAN |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | CO-VICE CHAIRMAN |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | CO-VICE CHAIRMAN |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| 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 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | VP & TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | VICE PRESIDENT |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1865 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingAmt | 0 | 64769 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 15044 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 21111 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 17796 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 21 |
| IRS990/GovernmentGrantsAmt | 0 | 213474 |
| IRS990/GrantAmt | 0 | 21736355 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 21694155 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 21694155 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 2211966 |
| IRS990/GrossReceiptsAmt | 0 | 61469866 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 20171 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 20 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 14 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 55655 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 103359 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 1115561 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 1274575 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 224536 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 7287 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 231823 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 320764 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 344119 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 23355 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 16458592 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 16120422 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 23189841 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 21064103 |
| IRS990/InvestTaxExemptBondsInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 1800 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 43078380 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 48644914 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 53351291 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 96429671 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 2194170 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 19136 |
| 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 | DEAN COLLEGE IS A PRIVATE, RESIDENTIAL NEW ENGLAND COLLEGE GROUNDED IN A CULTURE AND TRADITION THAT ALL STUDENTS DESERVE THE OPPORTUNITY FOR ACADEMIC AND PERSONAL SUCCESS. A UNIQUELY SUPPORTIVE COMMUNITY FOR MORE THAN 150 YEARS, DEAN HAS WOVEN TOGETHER EXTENSIVE STUDENT SUPPORT AND ENGAGEMENT WITH EXCEPTIONAL TEACHING AND INNOVATIVE CAMPUS ACTIVITIES. OUR GRADUATES ARE LIFETIME LEARNERS WHO THRIVE IN THEIR CAREERS, EMBRACE SOCIAL RESPONSIBILITY AND DEMONSTRATE LEADERSHIP. THIS IS THE DEAN DIFFERENCE. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 1 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 46587157 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 42511642 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 17796 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 17796 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 6067 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 6067 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 1035 |
| IRS990/NetRentalIncomeOrLossGrp/UnrelatedBusinessRevenueAmt | 0 | 1035 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 21255 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -2296478 |
| IRS990/NoncashContributionsAmt | 0 | 168701 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |