| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 729432 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 851789 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 16567 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 16593 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | TO DEVELOP RESPONSIBLE CITIZENS OF A GLOBAL SOCIETY. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 57115 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 57115 |
| IRS990/AllOtherContributionsAmt | 0 | 1574855 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 353 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 353 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | KIRK WHEELER |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4254545880 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 8300 NE 12TH STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | MEDINA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | WA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 98039 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 2948419 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 3174971 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 254563 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 137072 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 391635 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 331191 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 272033 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 169940 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 227 WESTLAKE AVE N |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 1402 YORK RD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 310 120TH AVENUE NE - SUITE 101 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | SEATTLE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | LUTHERVILLETIMONIUM |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | BELLEVUE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | WA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | MD |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | WA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 98109 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 21093 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 98005 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | SELLEN CONSTRUCTION |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | SAGE DINING SERVICES |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | CFO SELECTIONS LLC |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | CONSTRUCTION |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | DINING SERVICES |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | OUTSOURCE CFO |
| IRS990/ContriRptFundraisingEventAmt | 0 | 362042 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1936897 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 797619 |
| IRS990/CYInvestmentIncomeAmt | 0 | 874811 |
| IRS990/CYOtherExpensesAmt | 0 | 3835120 |
| IRS990/CYOtherRevenueAmt | 0 | -54822 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 7852837 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 451753 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 5525231 |
| IRS990/CYTotalExpensesAmt | 0 | 10157970 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 493374 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 10609723 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 3596470 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 4106307 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 8975 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 170517 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 717966 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 897458 |
| IRS990/Desc | 0 | PRIVATE SCHOOL EDUCATION FOR PRESCHOOL THROUGH 8TH GRADE. APPROXIMATELY 300 STUDENTS ARE EDUCATED BY 86 FACULTY AND STAFF. IN PARTNERSHIP WITH PARENTS, ST. THOMAS INSPIRES AND MOTIVATES INTELLECTUALLY CURIOUS STUDENTS. THE SMALL, NURTURING ENVIRONMENT SUPPORTS THE ACQUISITION OF A BROAD ACADEMIC FOUNDATION WITH AN EMPHASIS ON CRITICAL THINKING, LEADERSHIP SKILLS AND THE DEVELOPMENT OF A STRONG CHARACTER AND SPIRITUAL AWARENESS. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 86 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 7585141 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 41492 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 41492 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 963 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 963 |
| IRS990/FeesForServicesManagementGrp/ManagementAndGeneralAmt | 0 | 195515 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 195515 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/FundraisingAmt | 0 | 943 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 13208 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ProgramServicesAmt | 0 | 80191 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 94342 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 5.00 |
| 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 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 3 | 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/OfficerInd | 5 | 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 46673 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 23008 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 19845 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 19093 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 19038 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | THOMAS CUSICK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | GLYN NORDSTROM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | MEGAN SMITH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | DAVID ALHADEFF |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JOHN SHERWOOD JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | FRED BARKMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | THIEN-DI DO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | JAYASRI GHOSH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | THOM GRUHLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | JEFF HAIGHT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | JEMIMA HERMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | KEVIN HUGHES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | AMY LORIMER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | CAMPBELL MATHEWSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | CATHERINE NIELSEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | KATE PETERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | SARAH REED |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | KELLY TAYLOR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | PETER THORP |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | MADELIENE VALDMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | REV ALEXANDER BREKINRIDGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | KIRK WHEELER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | LEILA THOMAS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | ALEX COLLEDGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | NANCY MYLES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | KIMBERLY MECHAM |
| 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 340359 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 150416 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 120130 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 113136 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 112407 |
| 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/TitleTxt | 0 | BOARD PRESIDENT & TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | BOARD VICE PRESIDENT & TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | BOARD VICE PRESIDENT & TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD TREASURER & TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD SECRETARY & TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | VESTRY REP & 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 & PA REP |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | EX-OFFICIO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | DIRECTOR OF DEVELOPMENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | DIRECTOR OF MIDDLE SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | DIR OF EARLY LEARNING & EXTENED DAY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | DIR OF CENTER FOR LEADERSHIP & INNOVATION |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/FormationYr | 0 | 1951 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingAmt | 0 | 362042 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 129359 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 46800 |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 7400 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 247703 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 21 |
| IRS990/GrantAmt | 0 | 797619 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 793619 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 793619 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 4000 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 4000 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 7400 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 23757274 |
| IRS990/GrossReceiptsAmt | 0 | 34248653 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 21 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 5 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InfoInScheduleOPartXInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 2434 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 46251 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 194740 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 243425 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 1432 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 20046 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 121706 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 143184 |
| IRS990/InterestGrp/FundraisingAmt | 0 | 4516 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 63794 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 383331 |
| IRS990/InterestGrp/TotalAmt | 0 | 451641 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 619708 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 619708 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 100000 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 100000 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 23612344 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 26090222 |
| IRS990/IRPDocumentCnt | 0 | 38 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 7272164 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 22607304 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 22364593 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 29636757 |
| IRS990/LegalDomicileStateCd | 0 | WA |
| IRS990/LessCostOthBasisSalesExpnssGrp/OtherAmt | 0 | 0 |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 23509571 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MiscellaneousRevenueGrp/ExclusionAmt | 0 | 3050 |
| IRS990/MiscellaneousRevenueGrp/TotalRevenueColumnAmt | 0 | 3050 |
| IRS990/MissionDesc | 0 | THE MISSION OF ST. THOMAS SCHOOL IS TO DEVELOP RESPONSIBLE CITIZENS OF A GLOBAL SOCIETY. IN PARTNERSHIP WITH PARENTS, WE INSPIRE AND MOTIVATE INTELLECTUALLY CURIOUS STUDENTS. OUR SMALL, NURTURING ENVIRONMENT SUPPORTS THE ACQUISITION OF A BROAD ACADEMIC FOUNDATION WITH AN EMPHASIS ON CRITICAL THINKING, LEADERSHIP SKILLS AND THE DEVELOPMENT OF A STRONG CHARACTER AND SPIRITUAL AWARENESS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 13657128 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 13216225 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 33138929 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 35425531 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 255103 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 255103 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | -82559 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -82559 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 1832554 |
| IRS990/NoncashContributionsAmt | 0 | 1074503 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 10907 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 36358 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 316310 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 363575 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 1141 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 315766 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 8557 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 325464 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 2295 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 24671 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 65181 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 348494 |