| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 2324441 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 2470437 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 73369 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 131312 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | POLYTECHNIC IS AN INDEPENDENT, COEDUCATIONAL, DAY SCHOOL FOR APPROXIMATELY 860 STUDENTS. |
| IRS990/AllOtherContributionsAmt | 0 | 8127178 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 332871 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 131726 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 2007242 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 2471839 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | BUSINESS OFFICE |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6263966300 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1030 E CALIFORNIA BLVD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | PASADENA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 91106 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 2595845 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 2378647 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 84034 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 404236 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 168069 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 656339 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
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| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 111587 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 110672 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 12801 N OVERLOOK |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 1434 W COLORADO BLVD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 204 S ROSEMEAD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | RANCHO CUCAMONGA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | PASADENA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | PASADENA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 91739 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 91105 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 91107 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | RAMIRO GARCIA LANDSCAPING & MAINTENANCE |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | THE KITCHEN FOR EXPLORING FOODS |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | AIR TECH AC HEATING INC |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | LANDSCAPING & MAINTENANCE |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | CATERING |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | HVAC |
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| IRS990/CreditCounselingInd | 0 | 1 |
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| IRS990/CYContributionsGrantsAmt | 0 | 8149633 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 3762637 |
| IRS990/CYInvestmentIncomeAmt | 0 | 3416609 |
| IRS990/CYOtherExpensesAmt | 0 | 12638559 |
| IRS990/CYOtherRevenueAmt | 0 | 176852 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 26471790 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 2980271 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 18833417 |
| IRS990/CYTotalExpensesAmt | 0 | 35234613 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1762577 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 38214884 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 3245467 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 3573236 |
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| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 665621 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 2958318 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 3697897 |
| IRS990/Desc | 0 | POLYTECHNIC SCHOOL IS AN INDEPENDENT, COEDUCATIONAL DAY SCHOOL FOR APPROXIMATELY 860 STUDENTS IN KINDERGARTEN THROUGH GRADE TWELVE. THE SCHOOL WAS ESTABLISHED IN 1907 AND IS LOCATED ON A 15 ACRE CAMPUS IN PASADENA, CALIFORNIA. THE SCHOOL OFFERS A STRONG ACADEMIC PROGRAM, ACTIVITIES BEYOND THE CLASSROOM INCLUDING ATHLETICS, OUTDOOR EDUCATION, COMMUNITY SERVICE, AND THE VISUAL AND PERFORMING ARTS. THE SCHOOL STRIVES TO REFLECT THE CULTURAL, ETHNIC AND ECONOMIC DIVERSITY PRESENT IN THE PASADENA AND SAN GABRIEL VALLEY AREA. THE SCHOOL OFFERS SMALL CLASSES WHICH ENCOURAGE DEEP STUDENT-FACULTY INTERACTION, FACILITIES THAT ENHANCE THE ABILITY OF THE FACULTY TO TEACH, AND OPPORTUNITIES FOR FACULTY DEVELOPMENT. |
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| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 469 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
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| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 146706 |
| IRS990/ExpenseAmt | 0 | 30436715 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
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| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 57750 |
| IRS990/FeesForServicesLegalGrp/FundraisingAmt | 0 | 2877 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 84715 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 114430 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 202022 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 50000 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 50000 |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 60.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 26 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 27 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 28 | 50.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 29 | 50.00 |
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| 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 |
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| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 7 | X |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 42684 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 32979 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 48663 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 26 | 30770 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 27 | 20922 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 28 | 32702 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 29 | 37988 |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | BABCOCK JOHN |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | BRYANT JOEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | CASTRO JORGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | EDWARDS RUTH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | FRANK JOHN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | GUERRA JR RODRIGO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | HARVEY J DALE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | HUNT MELANY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | JAFFER SAEED |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | LAMB AMY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | LEE SCOTT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | MUNGER WENDY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | MURPHY ANN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | ROGERS B VICKY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | ROUNTREE STEPHEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | SABBAG MAGGIE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | SHUBIN DOROTHY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | SOWDEN ALISON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | TERRILE JAMES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | BRACKER JOHN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | REED DEBORAH E BASE COMP |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | REED DEBORAH EDEFERRED COMP |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | HUYSSOON KEITH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | FAY JONATHAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 26 | HAASE MARTIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 27 | NEILSON BENJAMIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 28 | DAMASCO TERESA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 29 | FELDMETH GREGORY |
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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 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
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| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 178743 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 364335 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 192770 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 177047 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 26 | 160119 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 27 | 147128 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 28 | 134610 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 29 | 133243 |
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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/ReportableCompFromRltdOrgAmt | 29 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | PRESIDENT |
| 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 | SECRETARY |
| 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 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | HEAD OF SCHOOL (RETIRED JUNE 2014) |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | PAYMENT REPORTED IN PRIOR YEARS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | CFO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | DIRECTOR OF SUMMER PROGRAM |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | DEVELOPMENT DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 27 | UPPER SCHOOL DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 28 | HUMAN RESOURCES DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 29 | ASSISTANT TO THE HEAD OF SCHOOL |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1907 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingAmt | 0 | 22455 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 22426 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 40315 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 209314 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 22 |
| IRS990/GrantAmt | 0 | 3762637 |
| IRS990/GrantsPayableGrp/BOYAmt | 0 | 160000 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 120000 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 3762637 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 3762637 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 1 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 13586692 |
| IRS990/GrossReceiptsAmt | 0 | 51699433 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 102021 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 22 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 37 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 3030 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 27271 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 349299 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 379600 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 18982 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 53269 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 342443 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 414694 |
| IRS990/InterestGrp/FundraisingAmt | 0 | 23290 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 209611 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 931605 |
| IRS990/InterestGrp/TotalAmt | 0 | 1164506 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 3207295 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 3207295 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 28125707 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 29554383 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 54458211 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 57034012 |
| IRS990/InvestTaxExemptBondsInd | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 102 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 19916627 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 74674627 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 72541455 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 92458082 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 13377378 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 84745 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MiscellaneousRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 104565 |
| IRS990/MiscellaneousRevenueGrp/TotalRevenueColumnAmt | 0 | 104565 |
| IRS990/MissionDesc | 0 | THE MISSION OF POLYTECHNIC SCHOOL IS TO DEVELOP THE INTELLECT, TALENTS, AND CHARACTER OF EACH STUDENT IN A COMMUNITY OF LEARNING DEDICATED TO PRINCIPLES OF ACADEMIC EXCELLENCE THAT VALUES THE UNIQUENESS AND DIGNITY OF EACH MEMBER AND FOSTERS PERSONAL RESPONSIBLITY AND SERVICE TO OTHERS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |