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| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1812783 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 83931 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 119676 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | TO PROVIDE FOR THE EDUCATIONAL NEEDS OF BOYS PRE-KINDERGARTEN THROUGH EIGHTH GRADE. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 900 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 900 |
| IRS990/AllOtherContributionsAmt | 0 | 6634293 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | JOHN J SPROULE |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2123690058 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 12 EAST 89TH STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | NEW YORK |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 10128 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
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| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 2000 |
| IRS990/ChangeToOrgDocumentsInd | 0 | true |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 4 |
| IRS990/CollectionsOfArtInd | 0 | true |
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| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 657240 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 442978 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 1132974 |
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| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | false |
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| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 27780 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 29023 |
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| IRS990/ConsolidatedAuditFinclStmtInd | 0 | true |
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| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 171819 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 396750 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 125112 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 333 WEST 52ND STREET |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 235 GARTH ROAD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 225 60TH STREET |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 440 WEST END AVENUE |
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| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | SCARSDALE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | BROOKLYN |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | NEW YORK |
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| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | NY |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | NY |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | NY |
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| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 11220 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 10024 |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 0 | ZUBATKIN OWNER REPRESENTATION LLC |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 1 | OUTLOOK INTERNATIONAL |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 2 | MARIO'S TRANSPORTATION INC |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 3 | DR M SCHWARTZMAN PHD |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | CONSTRUCTION |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | TRAVEL BROKER |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | BUS SERVICE |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | SCHOOL PSYCHOLOGIST |
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| IRS990/CYOtherRevenueAmt | 0 | 81122 |
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| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 78000 |
| IRS990/CYTotalRevenueAmt | 0 | 30788172 |
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| IRS990/Desc | 0 | PROVIDES ESSENTIAL EDUCATIONAL PROGRAMS TO YOUNG BOYS FROM PRE-KINDERGARTEN THROUGH EIGHTH GRADE - APPROXIMATELY 425 STUDENTS. WE OFFER A VARIETY OF PROGRAMS INCLUDING SPORTS, MUSIC, ART AND DRAMA. |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 26 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 27 | 40.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 28 | 40.0 |
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| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 4 | X |
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| 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/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 35459 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 36414 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 23769 |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Daniel S Connoly |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Michael J Marocco |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Jennifer C Price |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Marc H Robert |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | Mark S Shelton |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Alberto M Acosta |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | PATRICIA FARMAN-FARMAIAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | MARK K GORMLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ARTHUR J HALLERAN JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | KEVIN J HAYDEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | GREGORY T HOOGKAMP |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | EVE KLEGER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | DONALD J MACKINNON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | Eliza R Bolen |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | ROBERT K MCMILLAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | JOHN R MENZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | Lauren Burke |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | Frankie J Campione II |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | EVAN SHEINBERG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | Alexander M Carey |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | JULIE B SYKES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | CRAIG D WOOD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | P DAVID O'HALLORAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | JOHN J SPROULE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | ALEXIS AOYAMA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | MAUREEN BARRY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 26 | KIM DAVIDSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 27 | ERIC CHAPMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 28 | MICHAEL IMBELLI |
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| 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 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 267714 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 238588 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 205627 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 26 | 197263 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 27 | 187828 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 28 | 188186 |
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| 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/TitleTxt | 0 | President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Vice President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Vice President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | Secretary |
| 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 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | HEADMASTER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | DIRECTOR OF FINANCE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | ASSISTANT HEADMASTER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | DIRECTOR OF DEVELOPMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | HEAD OF LOWER SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 27 | HEAD OF UPPER SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 28 | PLACEMENT OFFICER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/Form990TFiledInd | 0 | true |
| IRS990/FormationYr | 0 | 1951 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/ConsolidatedBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 682804 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 467340 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 459035 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 1421779 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GamingDirectExpensesAmt | 0 | 0 |
| IRS990/GamingGrossIncomeAmt | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 21 |
| IRS990/GovernmentGrantsAmt | 0 | 197898 |
| IRS990/GrantsPayableGrp/BOYAmt | 0 | 0 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 0 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 1743219 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 1743219 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | true |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 32206621 |
| IRS990/GrossReceiptsAmt | 0 | 62040354 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 0 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 21 |