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| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 6526802 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 3723579 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 3558082 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | SEE SCHEDULE O |
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| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 454652 |
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| IRS990/BooksInCareOfDetail/PersonNm | 0 | ROBERT SAVAGE |
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| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | WATERTOWN |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02472 |
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| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 1794604 |
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| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 1722689 |
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| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 452407 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 358989 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 4 | 354912 |
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| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 2 BLANCHARD RD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 4002 SOLUTIONS CENTER |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 1635 SHAWSHEEN ST |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 4 | TWO INTERNATIONAL PLACE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | MILFORD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | BURLINGTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | CHICAGO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | TEWKSBURY |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 4 | BOSTON |
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| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | IL |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 4 | MA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 01757 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 01803 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 60677 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 01876 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 4 | 02110 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | CONSIGLI CONSTRUCTION |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | YOUR SPACE LANDSCAPE & CONSTRUCTION |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | C & W FACILITIES SERVICES |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 3 | MIDDLESEX GLASS COMPNAY |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 4 | CHOATE HALL & STEWART |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | CONTRACTOR & BUILDER |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | CONTRACTOR & BUILDER |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | MAINTENANCE & SECURITY STAFFING |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | CONTRACTOR & BUILDER |
| IRS990/ContractorCompensationGrp/ServicesDesc | 4 | LEGAL |
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| IRS990/CYProgramServiceRevenueAmt | 0 | 45015957 |
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| IRS990/CYTotalRevenueAmt | 0 | 57669429 |
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| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 3622972 |
| IRS990/Desc | 0 | BUCKINGHAM BROWNE & NICHOLS SCHOOL IS A COEDUCATIONAL DAY SCHOOL FOR CHILDREN GRADES PRE-KINDERGARTEN THROUGH TWELVE THAT STRIVES FOR THE PURSUIT OF EDUCATIONAL EXCELLENCE WHILE CELEBRATING THE DIVERSITY OF ITS COMMUNITY AND FOSTERING INTELLECTUAL CURIOSITY, CRITICAL THINKING AND A DEEP CONCERN AND RESPECT FOR OTHERS.STUDENTS: 1,003 TOTAL STUDENTS: 329 LOWER SCHOOL; 167 MIDDLE SCHOOL; 507 UPPER SCHOOLSTUDENT DEMOGRAPHICS: 492 BOYS; 511 GIRLS; 36% STUDENTS OF COLORTEACHING FACULTY: 159 TOTAL; 84 PERCENT HAVE ADVANCED DEGREES FINANCIAL AID: 23% PERCENT OF THE STUDENT BODYCOLLEGE COUNSELING: 4 COUNSELORS AVAILABLE FOR GUIDANCECOLLEGE MATRICULATION: THE CLASS OF 2018 ENTERED APPROXIMATELY 60 DIFFERENT COLLEGES AND UNIVERSITIESBB&N'S COMMITMENT TO DIVERSITY IS INTEGRAL TO THE MISSION AND VISION OF THE SCHOOL. THE DIFFERENT PERSPECTIVES AND EXPERIENCES OF OUR STUDENTS DEFINE THE FABRIC OF OUR COMMUNITY. THESE MANY PERSPECTIVES AND EXPERIENCES CONTRIBUTE TO THE GROWTH OF THE INDIVIDUALS WHO CALL BB&N THEIR ALMA MATER AND SHAPE THE CLASSROOM AND EXTRACURRICULAR EXPERIENCES. TO HAVE AS CLASSMATES AND FRIENDS PEOPLE WHO ARE DIFFERENT FROM ONESELF, TO COME TO TRULY KNOW THE BACKGROUND, EXPERIENCES, AND BELIEFS OF A NEW FRIEND, IS TO LEARN MORE DEEPLY ABOUT ONESELF AND OUR WORLD. THERE IS NO MORE IMPORTANT ATTRIBUTE IN THE PREPARATION FOR GLOBAL CITIZENSHIP. IN ADDITION, NO AMOUNTS HAVE BEEN REFLECTED IN THE FORM 990 FOR MANY HOURS OF CONTRIBUTED SERVICES FROM VOLUNTEERS. HOWEVER, MANY INDIVIDUALS VOLUNTEER THEIR TIME AND PERFORM A VARIETY OF TASKS THAT ASSIST THE SCHOOL WITH ITS ACTIVITIES. THE VALUE OF THIS CONTRIBUTED TIME AND EFFORT IS NOT REFLECTED IN THE FORM 990.EACH YEAR OVER 300 BB&N ALUMNI/AE, PARENTS AND FRIENDS SUPPORT THE SCHOOL BY VOLUNTEERING THEIR TIME. THIS GENEROUS SUPPORT ALLOWS BB&N TO ACCOMPLISH MANY OF THE THINGS THAT SET IT APART FROM OTHER INDEPENDENT DAY SCHOOLS. WE ARE ABLE TO RETAIN THE MOST QUALIFIED AND DYNAMIC FACULTY, PROVIDE TREMENDOUS ART AND ATHLETIC PROGRAMS, MAINTAIN BEAUTIFUL GROUNDS AND BUILDINGS, AND PROVIDE FINANCIAL ASSISTANCE TO QUALIFIED STUDENTS. |
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| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 520 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
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| IRS990/EscrowAccountInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 43639734 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
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| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 11268 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 112680 |
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| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 117441 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 650424 |
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| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
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| 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 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 26 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 27 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 28 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 29 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 30 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 31 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 32 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 33 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 34 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 35 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 36 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 37 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 38 | 40.00 |
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| 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/IndividualTrusteeOrDirectorInd | 21 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 22 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 23 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 24 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 25 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 26 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 27 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 28 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 29 | X |
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| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 1 | X |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 0 |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 27 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 28 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 29 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 30 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 31 | 34033 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 32 | 31508 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 33 | 25779 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 34 | 31601 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 35 | 22964 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 36 | 28467 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 37 | 14540 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 38 | 44802 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | REBECCA T UPHAM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | STEPHEN OLSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | LESLIE AHLSTRAND |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JEFFREY BARBER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JAMES T BERYLSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | CHARLES A BRIZIUS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | AGNES BUNDY SCANLAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | TIM COHEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | DIALA EZZEDDINE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | MARY BETH GORDON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | JASON P HAFLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | BOB HIGGINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | KENNETH W LANG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | PETER LEVITT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | BRIDGET TERRY LONG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | ERICA GERVAIS PAPPENDICK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | LESLIE RIEDEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | JANET M STORELLA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | DAVID J THOMPSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | CHARLOTTE CRAMER WAGNER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | FAN WU |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | BRACEBRIDGE H YOUNG JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | KAREN DONOVAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | CHRISTINE GROSS-LOH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | KATHRYN KARGMAN HOLDEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | FREDDIE JACOBS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 26 | TRISTIN MANNION |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 27 | EMMA SAGAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 28 | MATTHEW SIDMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 29 | STEPHEN SPALOSS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 30 | THOM GREENLAW |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 31 | SHERWOOD C HASKINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 32 | GEORGE L MITCHELL JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 33 | KATHERINE SMALL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 34 | GEOFFREY THEOBALD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 35 | MARY EVERETT DOLBEAR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 36 | DEMETRI ORLANDO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 37 | ROBERT SAVAGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 38 | BRETT FUHRMAN |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 813347 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 70464 |
| 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 27 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 28 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 29 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 30 | 117225 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 31 | 273779 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 32 | 170901 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 33 | 211715 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 34 | 184659 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 35 | 146488 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 36 | 137792 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 37 | 154702 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 38 | 146687 |
| 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/ReportableCompFromRltdOrgAmt | 27 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 28 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 29 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 30 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 31 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 32 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 33 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 34 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 35 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 36 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 37 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 38 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | FACULTY TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | VICE CHAIR |
| 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 | VICE CHAIR/TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 27 | YOUNG ALUM TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 28 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 29 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 30 | SPECIAL ADVISOR TO THE HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 31 | ASSISTANT HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 32 | DIRECTOR OF ENROLLMENT MANAGEMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 33 | DIRECTOR OF DEVELOPMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 34 | UPPER SCHOOL DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 35 | MIDDLE SCHOOL DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 36 | DIRECTOR OF IT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 37 | FINANCE MANAGER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 38 | CFO/COO (UNTIL JUNE 2017) |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1883 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 1 |